Mean Anteroposterior Diameter Research Articles

Prenatal Diagnosis and Clinical Outcomes of Isolated Mega Cisterna Magna.

Objective: The study aimed to investigate the clinical outcomes of fetuses diagnosed with isolated mega cisterna magna in utero. Methods: A multicenter retrospective cohort study was conducted across 18 university hospitals from 2010 to 2019. Cases diagnosed with isolated mega cisterna magna, defined as a cisterna magna >10 mm with a normal cerebellar vermis and no cystic dilation of the fourth ventricle, were included. Cases with other central nervous system (CNS) anomalies, extra-central nervous system anomalies, chromosomal abnormalities, or congenital infections were excluded. Maternal demographics, prenatal findings, delivery outcomes, and postnatal outcomes were analyzed. Results: The mean gestational age at initial diagnosis was 28.6 ± 3.9 weeks, and the mean anteroposterior diameter of the cisterna magna was 12.5 ± 3.2 mm. Of the 71 cases initially assessed, 48 (67.6%) showed self-regression in utero. Postnatally, 13 cases (18.3%) had persistent isolated mega cisterna magna, whereas 10 cases (14.1%) were diagnosed with other central nervous system anomalies. Among the persistent isolated mega cisterna magna cases, one child exhibited delayed neurodevelopment. There was a higher incidence of isolated mega cisterna magna in male fetuses, which exhibited a significantly larger mean cisterna magna diameter compared with female fetuses (P = .045). Conclusion: Male fetuses exhibited a higher incidence of isolated mega cisterna magna compared with female fetuses and had larger anteroposterior diameters of the cisterna magna. The study demonstrated favorable neurodevelopmental outcomes associated with isolated mega cisterna magna, with self-regression observed in two-thirds of the cases. However, consecutive prenatal and postnatal evaluations for additional central nervous system or extra-central nervous system malformations need to be performed, considering the differences between prenatal and postnatal diagnoses.

Morphometric analysis of internal auditory canal using CT imaging: An observational study in South Indian adult population

Abstract Background: The posterior surface of the petrous part of the temporal bone, located near the anterolateral wall of the posterior cranial fossa, houses the internal auditory canal (IAC). The lateral fundus of this canal is divided into three distinct openings that accommodate the facial, cochlear, and vestibular nerves. The present study attempts to measure the dimensions of the IAC using digital image processing to understand how anatomical variations may aid in surgical planning. Materials and Methods: A morphometric analysis of the IAC was conducted at Saveetha Medical College and Hospital in Chennai, Tamil Nadu, India, from November 2021 to May 2022. The study included subjects aged between 25 and 86 years who underwent temporal computed tomography (CT) scans revealing characteristics of the IAC. Imaging was obtained from the supraorbitomeatal plane with the subjects in a designated head support position. The scans were performed using a Philips Secura™ 128-slice Ingenuity CT scanner. The study measured the IAC opening width (OW), longitudinal length (LL), and anteroposterior (AP) diameter in both male and female subjects. Results: Of the 70 cases included in the study, 27 were female, and 43 were male. Three distinct shapes of the IAC were identified across both genders: cylindrical, funnel-shaped, and bud-shaped. Among the 70 samples, 30 exhibited a cylindrical shape, 29 were funnel-shaped, and 11 were bud-shaped. The mean width of the IAC (OW) for both male and female subjects was 0.77 ± 0.19. The mean LL was 1.08 ± 0.20 in males and 1.02 ± 0.21 in females. The mean AP diameter was 0.44 ± 0.13 in males and 0.40 ± 0.13 in females. Conclusion: A detailed understanding of the anatomy and spatial relationships within the IAC is critical for diagnosing and treating conditions affecting this region. This space’s frequent vestibular schwannomas (auditory neuromas) underscores the canal’s clinical significance.

Does the resistive index of the radial artery change after arterial cannulation in patients undergoing abdominal surgery? A prospective observational study.

To evaluate the flow at the cannulation site in the radial artery, the resistive indices (RIs) before cannula insertion and 6 h after decannulation were measured (primary outcome). The secondary outcomes were measurement of the artery size by anteroposterior (AP) diameter at the insertion site, RI and AP diameter at a point 4 cm proximal and in the ipsilateral ulnar artery before insertion and 6 h after cannula removal. In 96 patients requiring an arterial line during surgery, peak systolic velocity (PSV) and end-diastolic velocity (EDV) were measured to derive RI using a linear ultrasound transducer. The RI was measured at R1 (insertion point), R2, 4 cm proximal to R1, and U1 on the ipsilateral ulnar artery. The AP diameter of the arteries at baseline R10, R20 and U10 was measured and repeated 6 h after removal of the cannula, R16, R26 and U16. RI or AP diameter in R1 or R2 did not differ pre- and post-cannulation. Mean R10 1.143 [standard deviation (SD: 0.239)] versus R16 1.181 (SD: 0.260) m/sec [mean difference (MD): -0.0372 (95% confidence interval (CI): -0.098, 0.023), P = 0.230]. Mean AP diameter at baseline versus 6 h decannulation 0.177 (SD: 0.042) versus 0.172 (SD: 0.045) cm [MD: 0.005 (95% CI: 0.003, 0.013), P = 0.222] was also similar. The mean PSV in U10 versus U16 was higher: 0.480 (SD: 0.178) versus 0.528 (SD: 0.316) m/sec [MD: 0.120 (95% CI: -0.185, -0.054), P = 0.002] and AP diameter was also higher than baseline (P = 0.001). The flow in the radial artery did not change following cannulation. The PSV and AP diameter in the ulnar artery increased after decannulation, suggesting a compensatory increase in flow.

Foramen Magnum: Morphometric Analysis in Dry Adult Human Skulls

Abstract Background: Foramen magnum (FM) is a crucial aperture situated in the occipital bone and connects the brain to the spinal cord. Its size and dimensions are crucial in understanding a range of disorders, with implications for clinical, surgical, radiological, and forensic fields. We undertook the present study to analyze the morphometry of FM in detail and to compare this data with other similar studies. Methodology: This study analyzed 51 dry human skulls from Northern India of unspecified gender. Morphometric assessments of the FM were conducted, encompassing measurements of its shape, anteroposterior diameter (APD), transverse diameter (TD), FM index (FMI), size, and surface area using digital Vernier calipers. Minimum, maximum, and mean values and standard deviations (SDs) were calculated for each parameter. A comparison with previous studies was conducted. Results: The study established that the most common shape of FM as calculated by the ratio of AP diameter to TD was round (58.8% of specimens) and the majority of FM (41.1%) were narrow according to Martin and Saller classification. Mean APD was 33.71 ± 2.53, and TD was 27.88 ± 1.92; AP diameter was significantly greater than TD (P < 0.05). FMI ranged from 70.54 to 93.55 (mean: 82.92 and SD: 5.63). The mean surface area as calculated by Teixeira’s method was higher compared to Radinsky’s formula; 747.51 ± 96.25 mm2 and 739.93 ± 94.85 mm2, respectively. This difference was not statistically significant (P = 0.68). Conclusion: This study furnishes data on detailed morphometry of FM, a complete knowledge of which is essential for planning surgical procedures for optimal preoperative and postoperative results. It provides an objective definition of the FM’s morphology and highlights the ambiguous role of visual assessment which needs to be reconsidered. The comparison of present morphometric data with other national and international studies further highlights the ethnic and genetic variation of FM.

New Insights into the Diagnosis, Monitoring, and Management of Antenatal Hydronephrosis, Aiming to Refine Treatment Protocols: A Clinical Study.

Antenatal hydronephrosis (ANH) is a common prenatal finding that requires careful evaluation to determine appropriate management strategies. The variability in outcomes underscores the need for refined diagnostic and monitoring protocols to differentiate between cases necessitating intervention and those likely to resolve spontaneously. A prospective clinical study was conducted involving 150 pregnant women diagnosed with ANH between gestational weeks 18 to 24. Prenatal ultrasounds were performed at regular intervals to monitor renal pelvic dilatation. Postnatal evaluations included renal ultrasound, voiding cystourethrography, and nuclear renal scans to assess renal function and identify associated anomalies. Management decisions were based on standardized criteria including degree of hydronephrosis, presence of associated anomalies, and renal function. Of the 150 cases, 80 (53.3%) resolved spontaneously during the prenatal period, while 70 (46.7%) required postnatal intervention. Among the intervention group, 45 cases (64.3%) required surgical correction for persistent hydronephrosis or associated anomalies, while the remaining 25 cases (35.7%) were managed conservatively with close monitoring. Arbitrarily, the mean anteroposterior renal pelvic diameter (APRPD) in the resolved group was 5.2 mm, compared to 10.6 mm in the intervention group. The median postnatal follow-up duration was 24 months. This study highlights the importance of systematic evaluation and monitoring in managing ANH. While a significant proportion of cases resolve spontaneously, a careful assessment of associated anomalies and renal function is crucial in identifying cases requiring intervention. The arbitrary APRPD values presented underscore the potential for establishing diagnostic thresholds to guide clinical decision-making. Refinement of treatment protocols based on such parameters can improve outcomes and reduce unnecessary interventions in infants with ANH.

Does Age Influence the Functional Recovery after Infant Pyeloplasty?

The purpose was to study the correlation between age at surgery and functional recovery after infant pyeloplasty. All infants who underwent pyeloplasty were analyzed retrospectively in this multicenter study. Anteroposterior diameter (APD) >2 cm, split renal function (SRF) <40%, and Society of Fetal Urology (SFU) grade 3-4 were surgical indications. Based on the age at pyeloplasty, they were divided into Group 1 (1-3 months) and Group 2 (4-12 months). APD and SRF were compared before and after surgery in both groups. The fractional recoverable function (post-SRF-pre-SRF)/(50-pre-SRF) ×100 was correlated with age. Fifty-one infants underwent pyeloplasty (mean age: 1.6 months - Group 1 and 7.2 months - Group 2). The mean APD decreased from 3 cm to 1.2 cm in Group 1 while 2.8 cm to 2 cm in Group 2 (P = 0.001). The mean SRF increased from 32.28% to 42.81% in Group 1 while 31%-34.18% in Group 2. SRF recovery was significantly higher in Group 1 compared to Group 2 (P = 0.001). Regression analysis showed a weak negative correlation (r = -0.2792) between age at surgery and renal function improvement. Functional recovery after pyeloplasty is better when done earlier (1-3 months), as this gives the growing kidney the best opportunity to recover.

Cross-Sectional Study to Compare Preoperative Fasting Volume of Gastric Contents by Using Ultrasonography in Non-Diabetic and Diabetic Patients Posted for Elective Surgery

Background: Diabetic patients are known to have gastroparesis and consequent delayed gastric emptying which predisposes them to an increased risk of aspiration as compared to the general population. This study compares the gastric volumes in diabetic and non-diabetic patients using point-of-care ultrasound and correlates it with the HbA1c levels in diabetic patients.&#x0D; Methods: This cross-sectional study included 180 patients, 90 diabetic (&gt;5 years) and 90 nondiabetic, aged &gt;40 years, American Society of Anaesthesiologists' physical status I–II kept fasting for 8 hours. Before induction, gastric ultrasound was performed to measure craniocaudal (CC) and anteroposterior (AP) diameters followed by calculation of antral cross-sectional area (CSA) and gastric volume (GV) in right lateral decubitus (RLD) position using curved array probe. In diabetic patients, the gastric volumes were correlated with HbA1c values.&#x0D; Results: In the RLD, the mean CC and AP diameters were higher in diabetic Group. The calculated CSA in RLD in diabetics (8.014 ± 2.412 cm2) were significantly higher than non-diabetic (6.314± 2.894 cm2) (p &lt; 0.0001). The calculated GV of 71.501 ± 35.937 ml in the diabetic group was significantly higher than 48.0022± 41.587 ml in the non-diabetic group (p &lt; 0.0001). In diabetics, the gastric volumes showed significant correlation with HbA1c.&#x0D; Conclusion: Diabetic patients show higher residual gastric volume as compared to non-diabetic patients indicating gastroparesis. The gastric volumes are further increased in those with poorly controlled disease with high HbA1C levels. Ultrasound is an effective tool in assessing the risk of aspiration and altering anaesthetic management accordingly.

Role of urinary N-acetyl-beta-D-glucosaminidase in predicting the prognosis of antenatal hydronephrosis.

Urinary biomarkers are known to be able to diagnose renal damage caused by obstruction at an early stage. We evaluated the usefulness of urine N-acetyl-beta-D-glucosaminidase (NAG) to determine the prognosis of antenatal hydronephrosis. From January 2019 to December 2021, a retrospective study was performed on patients with grade 3 or 4 hydronephrosis. We analyzed the ultrasonographic findings and the urinary NAG/Cr ratio between the laparoscopic pyeloplasty (LP) group and active surveillance (AS) group. A total of 21 children underwent LP for ureteropelvic junction (UPJ) obstruction and 14 children underwent AS. The mean age at the time of examination was 3.7 months (1.7-7.5 months) in the LP and 5.2 months (0.5-21.5 months) in the AS (p=0.564). The mean anteroposterior pelvic diameter was 30.0 mm (15.0-49.0 mm) in the LP and 16.7 mm (9.0-31.3 mm) in the AS (p=0.003). The mean renal parenchymal thickness was 2.6 mm (1.2-3.7 mm) in the LP and 3.8 mm (2.9-5.5 mm) in the AS (p=0.017). The urinary NAG/Cr ratio was 26.1 IU/g (9.8-47.4 IU/g) in the LP and 11.1 IU/g (2.6-18.1 IU/g) in the AS (p=0.003). After LP, the urinary NAG/Cr ratio was significantly reduced to 10.4 IU/g (3.4-14.2 IU/g) (p=0.023). The urinary NAG/Cr ratio, one of the biomarkers of acute renal injury, is closely related to the degree of hydronephrosis. Therefore, it may be useful to determine whether to perform surgery on the UPJ obstruction and to predict the prognosis.

Anatomical Variations of The Diaphragma Sellae and Pituitary Stalk in Human Adult Cadavers in Myanmar

Objective: The middle cerebral fossa contains the sellar area. The diaphragma sellae, a dural fold, covers the sella turcica, which is located in the bony depression of the sphenoid bone. One of the most significant endocrine glands in the body, the pituitary gland’s stalk protrudes from the base of the brain through the diaphragma sellae’s primary hole.Material and Methods: This study was a cross-sectional experimental study and carried out on 30 human adult cadavers (20 males and 10 females) in order to describe the anatomical variations of diaphragma sellae and pituitary stalk.Results: The shapes of the diaphragma sellae were 17 flat types (56.7%), 12 concave types (40%) and 1 convex type (3.3%). The shapes of the central opening of the diaphragma sellae were 21 round types (70%), 5 coronal elliptical types (16.7%), and 4 sagittal elliptical types (13.3%). The mean anteroposterior diameter of the central opening of the diaphragma sellae was 6.92±1.47 mm and the transverse diameter was 7.06±1.46 mm. The mean anteroposterior diameter of the pituitary stalk was 1.83±0.41 mm and the transverse diameter of the pituitary stalk was 2.00±0.33 mm. The locations of the pituitary stalk were 20 posterior types (66.7%), 5 central types (16.7%), and 5 anterior types (16.7%).Conclusion: Neurosurgeons, maxillofacial surgeons, and clinical radiologists may find the current study of the diphragama sellae and sellar region helpful in contemplating the diseases and operational techniques in this area.

Clinical significance of morphological and morphometrical analysis of foramen magnum

Introduction: The foramen magnum is a transitional zone between cranial cavity and spinal canal, and it is related with the very important neuro-vascular structures like vertebral arteries, spinal accessory nerves and spinal arteries and terminal part of medulla oblongata. Therefore, thorough knowledge of morphometric and morphological variation of foramen magnum is important for authentic radiological diagnosis and surgeries in the area of cranio-cervical junction. Materials and Methods: This study was done on 70 dried human skulls taken from the Department of Anatomy, TS Misra Medical College &amp; Hospital, Era’s Lucknow Medical College &amp; Hospital, and KGMU, Lucknow. The shape of foramen magnum was observed and transverse and antero-posterior (AP) diameters of foramen magnum (FM) were measured with the help of vernier caliper. Foramen magnum index (FMI) and foramen magnum area (FMA) were also calculated. Results: The study showed six types of shapes of foramen magnum. The oval shaped foramen magnum was found in 47% (in 33 skulls), round 30% (in 30 skulls), tetragonal 10 % (in 10 skulls), triangular &amp; irregular 10% (in 5-5 skulls), pentagonal 2% (in 2 skulls), and hexagonal 1% (in single skull). The mean anteroposterior and transverse diameter were 34.3±2.90mm and 28.9±2.80 mm respectively. The mean foramen magnum index and Foramen magnum area were 77.80±27.80 and 845.90±87.50 mm2 respectively. Conclusions: The data obtained from the present study will be useful to the neurosurgeons prior to the surgeries in the area of cranio-cervical junction and posterior cranial fossa. The morphometric and morphological knowledge of the foramen Magnum has important clinical implications in the prognosis and treatment of various neurological pathologies like Arnold Chiari syndrome, Achondroplasia and posterior cranial fossa lesions. Keywords: Foramen magnum, Transcondylar approach, Foramen magnum index, Foramen magnum area, Transverse diameter (TD), Anteroposterior diameter, Trigonal.

ANATOMIC AND MORPHOMETRIC VARIATIONS OF FORAMEN SPINOSUM IN ADULT HUMAN SKULL IN PESHWAR PAKISTAN AND ITS CLINICAL IMPORTANCE

Aims and Objectives: The main aim of the current study is to evaluate various shapes of FS and differences in its number, size, and position related to the spine of sphenoid bone. Materials and Methods: 46 adult macerated dried skulls were used in this study. All measurements were made with a digital Vernier calipers and a screw-adjusted compass. Using the formula “A = (x L x B) /4)” = 3.14, L = length, B = breadth of FS, the area was measured. For each measurement, the mean (SD) was determined. The data was analyzed, using SPSS version 20 and a P value of 0.05 was taken as statistically significant. The mean difference in foramen spinosum length (L) and breadth (B), between both sides was measured using an independent t-test. Results: On the right side, mean antero-posterior (AP) diameter of FS was 3.52 ± 1.33 mm, on left it was 3.26 ± 1.26 mm. the mean TD of the right FS was 3.3 ± 1.19 mm, whereas on the left it was 2.96 ± 1.90 mm. No significant difference was observed, through independent t-test between the AP and TD Diameters on both sides of skull. Conclusions: Various shapes of foramen spinosum were noted. In comparison to data from earlier research, the foramen spinosum mean diameter was larger. Therefore, for clinicians who work on the middle cranial fossa for various surgeries, it is essential to recognize different variations of the FS

COMPUTED TOMOGRAPHY STUDY OF THE THYMUS AT A TERTIARY CARE CENTRE OF NEPAL

Background: Thymus is a small, irregular shaped gland mainly concerned with immune function. Studies have shown that in different age groups and in genders, the morphology of thymus is variable. Hence this study was aimed to access the different shapes, size of thymus gland using Computed tomography scan. Methods: The study was a descriptive cross-sectional study conducted in Department of Radiology and Imaging, College of medical sciences, Bharatpur, Nepal. This study was conducted for a period of three months among 104 patients. Computed tomography examination was conducted by the Toshiba 160 slice CT scanner with slice thickness of 1.5mm. Statistical analysis was done with Statistical Package for the Social Sciences (SPSS) version 16. Only descriptive statistics were employed and the results were presented in tabular format. Results: In total 104 patients participated in this study. The frequency of male was 39 (37.5%) and female 65 (62.5%). The mean age of patients was 55±15.1 years. The mean anteroposterior diameter in the male was 17.62±5.98 mm and in female it was 16.02±5.78 mm, similarly the transverse diameter in male was 30.85±11.85 and in female it was 28.80±10.23 mm. Triangular morphology was most common among both male and female with frequency of 31(79.5%) and 34(52.3%) respectively. Conclusions: Thymus gland is slightly larger in males than females. From this study we can conclude that triangular thymic shape was most frequently observed morphological shape in both male and female.

Non-refluxing Primary Megaureter in Children Resolves From Proximal to Distal

To evaluate a population of children with non-refluxing primary megaureter (NRPM), we investigated spontaneous resolution of ureteral dilation and the pattern (proximal to distal or distal to proximal) in which it occurs. From our prospectively collected prenatal hydronephrosis (HN) database (0-24months, 2008-2017), selecting those with NRPM (n=92). We excluded patients who underwent surgery (n=20), children with <6months follow-up (n=2) and without a voiding cystourethrogram (VCUG) (n=4). Images were segregated into 198 ureteric segments (proximal/mid/distal). We defined resolution as Society for Fetal Urology (SFU) (0/1), anteroposterior diameter (APD) <10mm, and ureteric dilatation <5mm. Descriptive statistics and Kaplan-Meier curves were created for time-to-resolution analyses. Of 66 patients and 198 ureteral segments, median age at presentation was 2months (0-12), 83% were male (33% circumcised). Mean APD at baseline was 11±4mm, and 79% had (SFU 3/4) HN. Mean dilatation of ureteral segments (mm) at baseline was: 9±2 proximal, 9±2 mid, and 11±3 distal. At a median follow-up time of 26 (7-83) months, dilation of 55 (83%) proximal, 48 (72%) mid, and 22 (33%) distal ureteric segments had resolved. Overall, HN resolution occurred in 76% of patients. Resolution rates were similar for proximal/mid-ureters (83% vs 72%; P=.20); however, they were significantly different from distal segments (83% proximal vs 33% distal; 72% mid vs 33% distal, P<.01). Our data suggest that spontaneous resolution of NRPM follows a proximal to distal progression. Distal ureteric dilatation takes up to 10months longer to resolve compared to that of proximal and mid-ureteric segments, as well as that of the renal pelvis.

ULTRASONOGRAPHIC MORPHOMETRIC ANALYSIS OF UTERUS IN NULLIPAROUS AND MULTIPAROUS FEMALES ATTENDING TERTIARY CARE HOSPITAL

Background: Uterus is considered as a major reproductive organ in women which is responsible for pregnancy and delivery of the foetus. The dimensions of the uterus can act as the markers for the reproductive health of the women. The dimension of the uterus deviates from the normal dimensions in the presence of any anomalies. Therefore, the uterine dimensions can help in predicting the reproductive health of the women and help in the treatment. Ultrasonography is an overexploited technique due to the key advantages it provides in diagnoses purposes. The uterine dimension can easily be measured by this technique. Aims and Objectives: To measures the uterine dimension using Ultrasonography of women lying in the age group of 15-45 years. Methods- Uterine dimensions of 200 nulliparous and parous women were measured in the study and comparison were made from the normal counterparts. Results: Women lying in 15-25 years of age were having the mean longitudinal length as 6.43±0.24 cm, mean Anteroposterior diameter as 2.96±0.33 cm and mean transverse diameter as 3.77±0.45cm. In age group of 26-35 years, the mean longitudinal length was 7.72±0.630, mean anteroposterior diameter was 3.59±0.42 cm and mean transverse diameter was 4.42±0.52 cm. In age group of 36-45 years the mean longitudinal length was 8.57±0.55, mean anteroposterior diameter was 4.12±0.45cm and mean transverse diameter was 4.93±0.46cm. Conclusion: Our study showed a significant increase in uterine dimensions with Age and Parity. These values are of immense importance for predicting and later on diagnosing any uterine pathology affecting its dimensions.

Morphological Measurements of Innominate Foramina and Bony Spurs along the Base of Sphenoid as a Potential Risk Factor for Neurovascular Entrapment, Radiological Interpretation and Surgical Access.

Restricted access and compression of neurovascular structures at various anatomic variations at the skull base poses a challenge to surgeons, neurologists and anesthetists. The present study was performed with the objective of providing morphometric analysis of innominate foramina, and anomalous bony bars and spurs along the infratemporal surface of the greater wing of the sphenoid and reviewing the practical significance of dealing with this region. A total of 100 dry-aged human adult skulls from the archives of the osteology library of the Department of Anatomy were studied. A detailed morphometric analysis of such innominate foramina and anomalous osseous structures along the base of the sphenoid was performed using a sliding digital vernier caliper. Anomalous bony bar was found in 22 skulls (25.28%). A complete bar was observed at eight (9.1%). An innominate foramen was located inferomedial to foramen ovale (5 unilateral and 3 bilateral) with a mean anteroposterior diameter of 3.44 mm and a mean transverse diameter of 3.16 mm. Neurovascular structures may be compressed by abnormal bony outgrowths or while traversing through such unnamed bony foramina. The latter may also be overlooked and mistaken during radiological interpretation leading to delayed diagnosis. Such unnamed foramina and bony outgrowths need to be documented in the literature due to their surgical, and radiological implications and limited citations.

Gynaecoid Pelvis among Female Patients Attending Department of Radiology of a Tertiary Care Centre: A Descriptive Cross-sectional Study

The bony pelvis consists of the two hip bones, the sacrum and the coccyx. The bony pelvis is divided into the greater pelvis and the lesser pelvis. The junction between the greater and the lesser pelvis is the pelvic inlet. The transverse and anteroposterior dimensions of the pelvic inlet will classify the pelvis as the anthropoid, gynaecoid, android, and platypelloid pelvis. Knowledge of female pelvis type is important for obstetricians to know the process of labour which can decrease the morbidity and mortality of mothers and neonates. Thus, the aim of this study was to find out the prevalence of gynaecoid pelvis among female patients attending the Department of Radiology of a tertiary care centre. This was a descriptive cross-sectional study conducted in the Department of Radiology of a tertiary care centre from 24 July 2022 to 15 November 2022 after approval from the Institutional review committee (Reference number: 11/022). The study included radiographs of the female pelvis without any bony pathology and developmental anomalies. Anteroposterior and transverse dimensions of the pelvic inlet were measured using a digital ruler in a computer. A convenience sampling method was done. Point estimate and 95% confidence interval were calculated. Among total female patients, the gynaecoid pelvis was found in 28 (46.66%) (34.04-59.28, 95% Confidence Interval). Mean anteroposterior and transverse diameters for the gynaecoid pelvis were observed to be 12.85±1.0 cm and 13.66±1.07 cm respectively. The prevalence of gynaecoid pelvis was similar to the other similar studies conducted in similar settings. female; pelvis; radiology.

Do we know the normal anterior-posterior diameters of the spinal cord and canal in newborns?

Aim: We aim to reveal the normal anterior-posterior diameter of the spinal cord and canal at cervical, thoracic and lumbar levels in newborn with sonographic measurements and to create a reference value. Also, we aim to reveal whether the anterior-posterior diameter at these levels will vary with the newborn's head circumference, gender, height and weight. Thus, we aim to be one of the pioneering studies in the literature&#x0D; Material and Method: Statistical analysis was performed to determine normal anterior-posterior diameter for the spinal canal and spinal cord at each vertebral level, and their correlations with birth weight, length and head circumference.&#x0D; Results: 188 newborns were included. The mean anteroposterior spinal canal diameter in male newborns was significantly higher compared to females (9.27±0.83 vs 9.00±0.79, p=.020). There was a positive correlation between spinal cord anterior-posterior diameter and head circumference at thoracic level, which was statistically significant. There was a positive correlation between spinal canal diameter and height at thoracic level. There was a positive correlation between spinal canal diameter and weight at lumbar level. &#x0D; Conclusion: The establishment of the normal values for anterior-posterior diameters of the spinal cord in healthy newborns may contribute the current literature data.

Morphometric Variations of the Foramen Lacerum in Dry Skulls and Its Clinical Significance: A Cross-sectional Study

Introduction: The foramen lacerum is located in the middle cranial fossa and transmits a number of nerves and blood vessels. Occlusion can result in the compression of the neurovascular bundle, and the foramen has been reported to be involved in the spread of tumours into the cranium. Aim: The aims of the present study was to describe the morphology of the foramen lacerum and to compare the anatomical parameters on the left and right sides of the skull. Also, the significance of the anatomical parameters in male versus female skulls and right side versus left side of the skull where studied. Materials and Methods: This cross-sectional study was conducted in May and June 2023 using 62 dry skulls (124 foramen lacerum) available in the Department of Anatomy at Gautam Buddha Chikitsa Mahavidyalay, a tertiary care teaching institute in Dehradun, Uttarakhand, India. The anatomical parameters, including the Anteroposterior (AP) and transverse diameters, were recorded using a calibrated digital Vernier caliper. The shape of the foramen was also observed. The mean and standard deviation of the recorded parameters were obtained. Results: Out of the 62 skulls, 41 were males and 21 were females, resulting in a male-to-female ratio of 1.8:1. The mean AP diameter on the Right Side (RT) and Left Side (LT) in males was 6.26 mm and 6.24 mm, respectively, while in females, the mean diameter was 4.97 mm (RT) and 5.4 mm (LT). The mean transverse diameter recorded in the present study was 6.14 mm (RT) and 6.2 mm (LT) in males, while in females, this measurement was 5.88 mm on both sides. The most common shape of the foramen lacerum observed in the study was bilaterally round, in both males and females. Conclusion: There are morphological differences in the AP diameter between male and female skulls, with males having a larger AP diameter on their right side and females having larger AP diameter on their right side. The overall size of the foramen lacerum was smaller in the present study, indicating a higher likelihood of neurovascular bundle compression with age. The recent advances in skull base surgery warrant further and larger studies on this neglected yet important foramen to gather more data on its morphometric variations in different geographical regions.

Morphometric Analysis of the Body, Pedicle and Lamina of Typical Thoracic Vertebrae: An Observational Study

Introduction: Thoracic vertebrae are a part of the vertebral column. The thoracic vertebrae have a body size between the cervical and lumbar vertebrae, which increase gradually from above downward and are characterised by the presence of facet joints for articulation with the head of the ribs on the side of the vertebral bodies. Aim: To measure the various morphometric parameters of different components of dry thoracic vertebrae and compare various components on the right and left-sides. Materials and Methods: The present observational study was carried on 100 dry human thoracic vertebrae for direct measurements of the vertebral body, pedicle and lamina. Using a digital Vernier calliper, all the parameters were measured. The data was entered in Microsoft Excel sheet. The mean and standard deviation (M±SD) of all parameters were analysed using Statistical Package for the Social Sciences (SPSS) version 21.0. Student’s t-test was used for the comparison of morphometric dimensions of the right and left-sides. Results: In a typical thoracic vertebra, the mean Transverse Diameter (TD) was 25.58±2.34 mm, and the mean Anteroposterior Diameter (APD) of the vertebral body was 18.53±2.59 mm. The mean Anterior Height (AH) and Posterior Height (PH) of the body were 16.24±1.54 mm and 17.81±1.67 mm, respectively. The mean Pedicle Width (PW) was 3.75±0.98 mm on the right-side and 3.74±0.97 mm on the left-side. The mean Pedicle Height (PH) was 9.64±1.04 mm on the right-side and 9.68±1.14 mm on the left-side. The mean Lamina Height (LH) on the right-side was 17.07±2.15 mm and on the left-side was 17.20±1.98 mm. The right-side and left-side mean Lamina Widths (LW) were 5.26±0.94 mm and 5.13±0.85 mm, respectively. PW and PH and lamina thickness and LH measurements showed no statistically difference between right and left-sides. Conclusion: Designing implants and instruments using data from such researches can benefit the surgeon during preoperative planning.

Morphological and Morphometric Variations in Foramen Transversarium: A Cross-sectional Study in Dried Cervical Vertebrae of Western Odisha Origin

Introduction: Foramen transversarium refers to bilateral foramina found lateral to the vertebral body in the transverse process of the cervical vertebrae. Many variations are observed in these foramina which may lead to vertebrobasilar insufficiency, labyrinthine or hearing disturbances along with neurological symptoms due to compression or tortuosity of vertebral artery as it passes through the foramen. Aim: To study the morphological and morphometric variations of the foramen transversarium in cervical vertebrae. Materials and Methods: This cross-sectional study was conducted in Department of Anatomy, Veer Surendra Sai Institute of Medical Sciences and Research, Burla, Odisha, India, from June 2022 to August 2022. A total of 367 human cervical vertebrae were procured from the anthropology section of Department of Anatomy. Vertebrae with any damage to foramen transversarium were discarded. Each vertebra was observed for shape, size, symmetry, number of foramen transversarium and osteophytic encroachment. Distance of foramen transversarium from the medial margin of uncinate process was measured bilaterally in C3 to C7 vertebrae. Data collected was tabulated and analysed by Microsoft excel software 2019. Results: Mean anteroposterior diameter and transverse diameter in left-side were 5.45 mm and 5.42 mm respectively and in right-side the measurements were 5.29 mm and 5.23 mm respectively. Double foramen transversarium was observed in 40 (10.9%) vertebrae. Among them 18 (4.9%) was bilateral and 22 (6.0%) was unilateral. In 2 (0.54%) vertebrae there was triplication of foramen transversarium. In 34 vertebrae (9.26%) there was incomplete duplication of which 9 (2.45%) were bilateral and 25 (6.81%) were unilateral. Six different shapes of foramen transversarium were observed out of which round shape (62.1%) was the most common finding. In 261 (71.1%) of vertebrae the main foramen transversarium was symmetrical in both sides but in 106 (28.9%) it was asymmetrical. Osteophytic encroachment was found in 14 (3.81%) vertebrae. The mean distance of the foramen from medial margin of uncinate process was 5.32 mm on the left and 5.42 mm on the right-side. Conclusion: The morphological data like very narrow foramina and such a high number of accessory foramina produced through the present study definitely points towards the variations of vertebral vessels.