Nasal Groove Research Articles

Nasofacial Groove Pedicled Flap for the Reconstruction of Lateral Alar Defect.

The repair of nasal alar defects is challenging for plastic surgeons, and there is currently no standard operation. Herein, the authors reported the clinical outcomes of a nasofacial groove pedicled flap for the reconstruction of alar defect. This retrospective study included patients who underwent the nasofacial groove pedicled flap for the reconstruction of alar defect between January 2018 and June 2020. Photographs of standard facial postures were taken before and after surgery to record the surgical results of the patients. The patient's medical history was reviewed retrospectively. Self-reported satisfaction of patients on scar morphology and reconstructive effect were evaluated with a questionnaire survey. There were 26 eligible patients enrolled, and all patients were followed up for more than 1 year after surgery. All flaps were free of ischemia and necrosis and healed well. No patient experienced restricted nostril ventilation. Eight patients underwent reoperation to trim the flap pedicle and the scar. Eight patients (8/26) reported "very satisfied," and 17 patients (17/26) reported "satisfied" with the repair effect and scar morphology. One patient went through multiple laser treatments to improve her scars but still remained visible hyperpigmentation. She was dissatisfied with postoperative flap pigmentation but was satisfied with the correction effect. The clinical results indicated that the nasal groove flap was safe for the treatment of the lateral alar defect, and the patients were satisfied with the clinical results. The authors believe that this flap can be used as an alternative method for repairing the lateral alar defect. Level -IV, therapeutic study.

Evaluation of Sporadic and Familial Cases with Craniofrontonasal Syndrome: A Wide Clinical Spectrum and Identification of a Novel EFNB1 Gene Mutation

Craniofrontonasal syndrome (CFNS) is a rare X-linked genetic disorder which is characterized by coronal synostosis, widely spaced eyes, a central nasal groove, and various skeletal anomalies. Mutations in the EFNB1 gene in Xq13.1 are responsible for familial and sporadic cases. In the present study, we aimed to evaluate the clinical characteristics and molecular results of 4 patients with CFNS. Genomic DNA was extracted from the peripheral blood lymphocytes of all patients and their parents, and Sanger sequencing of the EFNB1 gene was performed. A novel EFNB1 gene mutation (c.65delG; p.Cys22SerfsTer24) was detected in a newborn who had only dysmorphic facial features and bicornuate uterus. The other 3 patients (2 familial cases and 1 sporadic case) shared the same mutation (c.196C>T; p.R66X). However, the clinical features of these patients were highly variable. Additionally, central (meso-axial) polydactyly and deep palmar creases were detected, which have not been previously reported. CFNS has a wide clinical spectrum, but there is no clear genotype-phenotype correlation. However, central (meso-axial) polydactyly and deep palmar creases may be part of the clinical spectrum seen in CFNS. In addition, our findings expand the mutational spectrum in patients with CFNS.

CONSERVATIVE SURGERY IN THE TREATMENT OF LARGE PSAMMOMATOID JUVENILE OSSIFYING FIBROMAS: A CASE REPORT

Juvenile ossifying fibromas are uncommon benign tumors. Their aggressiveness added to their high tendency to recur provokes real diagnostic and therapeutic challenges for the dentist in addition to making postoperative follow-up over the subsequent years indispensable. In this case report, we present 17-year-old patient G.S.L. who sought out the stomatology service with complaints of painless swelling on the left side of the upper jaw and a slight obliteration of the nasal groove with an evolution of 20 days. After anamnesis and clinical examination, an incisional biopsy of the lesion was performed, and a definitive diagnosis of psammomatoid juvenile ossifying fibroma obtained. The treatment was enucleation, based on the previous biopsy that evidenced an encapsulated lesion not requiring maxillectomy. Because of its dimensions, an enucleation under general anesthesia was performed. The patient is currently the subject of regular observation and shows no signs of relapse.

Placento-Cranial Adhesion: A New Syndromic Association

AbstractCases of placento-cranial adhesion are rare and most of them are incompatible with life. A few case reports in the literature have included such cases under the overarching rubric of amniotic band syndrome. We present autopsy findings of four cases with gestation period ranging from 16 to 21 weeks. All of them displayed placenta-cranial adhesion, low weight for gestation, absence of flat bones of skull, anencephaly, dysmorphic facial features, short umbilical cord and limb/digit amputation with oligohydrambios. Three out of four showed nasal groove. We propose that there are grounds for syndromic association of the features mentioned above. Furthermore, it is important that whenever such cases are identified termination of pregnancy should be considered. The article also underscores the importance of fetal autopsies.

A Computational Study of the Hydrodynamics in the Nasal Region of a Hammerhead Shark (Sphyrna tudes): Implications for Olfaction

The hammerhead shark possesses a unique head morphology that is thought to facilitate enhanced olfactory performance. The olfactory chambers, located at the distal ends of the cephalofoil, contain numerous lamellae that increase the surface area for olfaction. Functionally, for the shark to detect chemical stimuli, water-borne odors must reach the olfactory sensory epithelium that lines these lamellae. Thus, odorant transport from the aquatic environment to the sensory epithelium is the first critical step in olfaction. Here we investigate the hydrodynamics of olfaction in Sphyrna tudes based on an anatomically-accurate reconstruction of the head and olfactory chamber from high-resolution micro-CT and MRI scans of a cadaver specimen. Computational fluid dynamics simulations of water flow in the reconstructed model reveal the external and internal hydrodynamics of olfaction during swimming. Computed external flow patterns elucidate the occurrence of flow phenomena that result in high and low pressures at the incurrent and excurrent nostrils, respectively, which induces flow through the olfactory chamber. The major (prenarial) nasal groove along the cephalofoil is shown to facilitate sampling of a large spatial extent (i.e., an extended hydrodynamic “reach”) by directing oncoming flow towards the incurrent nostril. Further, both the major and minor nasal grooves redirect some flow away from the incurrent nostril, thereby limiting the amount of fluid that enters the olfactory chamber. Internal hydrodynamic flow patterns are also revealed, where we show that flow rates within the sensory channels between olfactory lamellae are passively regulated by the apical gap, which functions as a partial bypass for flow in the olfactory chamber. Consequently, the hammerhead shark appears to utilize external (major and minor nasal grooves) and internal (apical gap) flow regulation mechanisms to limit water flow between the olfactory lamellae, thus protecting these delicate structures from otherwise high flow rates incurred by sampling a larger area.

Appraisal of transverse nasal groove: A study

Transverse nasal groove is a condition of cosmetic concern which awaits due recognition and has been widely described as a shallow groove that extends transversely over the dorsum of nose. However, we observed variations in the clinical presentations of this entity, hitherto undescribed in literature. We conducted a clinicoepidemiological study of transverse nasal lesions in patients attending our outpatient department. We conducted a prospective observational study. We screened all patients attending our out-patient department for presence of transverse nasal lesions, signs of any dermatosis and associated other skin conditions. One hundred patients were recruited in the study. Females (80%) predominated over males. Most patients were of 15-45 years age group (70%). Majority of the transverse nasal lesions were classical transverse nasal groove (39%) and others included transverse nasal line (28%), strip (28%), ridge (4%) and loop (1%). Seborrhoeic diathesis was the most common condition associated with transverse nasal lesion. Occurrence of transverse nasal line, strip, ridge and loop, in addition to classical transverse nasal groove implies that latter is actually a subset of transverse nasal lesions. Common association of this entity with seborrheic dermatitis, seborrhea and dandruff raises a possibility of whether transverse nasal lesion is a manifestation of seborrheic diathesis.

New information on the protorosaurian reptile Macrocnemus fuyuanensis Li et al., 2007, from the Middle/Upper Triassic of Yunnan, China

ABSTRACT A new specimen of the protorosaur Macrocnemus fuyuanensis, from the Zhuganpo Member of the Falang Formation at Fuyuan (Yunnan Province, southwestern China), is described and compared with Macrocnemus bassanii. The new specimen is the first in the genus Macrocnemus that clearly shows details of the preorbital region of the skull. A large, plate-like lacrimal is located in front of the tall, columnar prefrontal that defines the anterior margin of the orbit. A longitudinally oriented nasal groove extends along the anterior two-thirds of the snout, accommodating the external naris at its anterior part. A similar preorbital depression has previously been described for Dinocephalosaurus and it is also reported here for the first time in Tanystropheus. The new specimen confirms the status of Macrocnemus fuyuanensis as a species distinct from Macrocnemus bassanii on the basis of a humerus that significantly exceeds the radius in length. The occurrence of both Macrocnemus and Tanystropheus in southwestern China further underscores the close faunal affinities of the eastern and western Tethyan realms during the Middle and early Late Triassic.

Functional morphology of the nasal region of a hammerhead shark

We describe several novel morphological features in the nasal region of the hammerhead shark Sphyrna tudes. Unlike the open, rounded incurrent nostril of non-hammerhead shark species, the incurrent nostril of S. tudes is a thin keyhole-like aperture. We discovered a groove running anterior and parallel to the incurrent nostril. This groove, dubbed the minor nasal groove to distinguish it from the larger, previously described, (major) nasal groove, is common to all eight hammerhead species. Using life-sized plastic models generated at 200 μm resolution from an X-ray scan, we also investigated flow in the nasal region. Even modest oncoming flow speeds stimulate extensive, but not complete, circulation within the model olfactory chamber, with flow passing through the two main olfactory channels. Flow crossed from one channel to another via a gap in the olfactory array, sometimes guided by the interlamellar channels. Major and minor nasal grooves, as well as directing flow into the olfactory chamber, can, in conjunction with the nasal bridge separating incurrent and excurrent nostrils, limit flow passing into the olfactory chamber, possibly to protect the delicate nasal structures. This is the first simulation of internal flow within the olfactory chamber of a shark.

Extension cutanée d’un chordome

Chordomas are rare extradural bone tumors arising from notochord remnants, the embryonic structure forming the original axis of the spine. They represent 0.1p. 100 of all intra-cranial tumors. The chordoma is a locally malignant cancer that tends to invade the surrounding tissues. Its localization in the skin is exceptional. A 56 year-old man developed a nut-sized vegetating nodule on the nasal groove. This lesion appeared a few months following surgery for a frontoglabellar relapse of a chordoma that had developed six years earlier at the base of the skull. We report this case because of the rareness of cutaneous involvement and the particular conditions in which it occurred. It may have been due to tumoral seeding during the previous surgical interventions.

Combined nasal and skull base pathology: adjacent nasal schwannoma and olfactory groove meningioma

A 55-year-old woman presented with a longstanding history of headache and personality change. Preoperative imaging suggested an olfactory groove meningioma invading the posterior nasal space. Following surgical removal of the lesion histopathology confirmed the presence of both a nasal schwannoma and an olfactory groove meningioma. This dual pathology may represent a variation of neurofibromatosis type 2 (NF-2).

Disappearance of epidermal growth factor receptor is essential in the fusion of the nasal epithelium.

Abstract Epidermal growth factor (EGF) and receptor (-R) signaling pathway is required for epithelial cell growth and differentiation such as the degeneration of the medial edge epithelial cells during the fusion process of secondary palate formation. As epithelial fusion takes place during primary palate formation, we investigated the involvement of the EGF-R in fusion of the medial (MNP) and lateral (LNP) nasal prominences of the mouse embryo was examined. Immunoreactivity of EGF-R was investigated in embryonic day 10 embryos (32-37 somite stages). The EGF-R immunoreactivity was observed in the nasal epithelia of the presumptive fusion area before fusion. It became undetectable just prior to the fusion and faintly reappeared at the time of the fusion. In contrast, the non-fusing epithelial cells of the nasal groove maintained the immunoreactivity throughout these stages. In order to elucidate whether the EGF/EGF-R signaling pathway was involved in nasal epithelial fusion, EGF solution was injected into the exocoelum of explanted mouse embryos, and the embryos were cultured for 18-24 h by whole embryo culture (WEC). This exogenous EGF inhibited fusion of nasal prominences in 66.7-81.5% of the embryos. Treatment with EGF for 4-14 h showed that exogenous EGF disturbed the EGF-R disappearance and normal alteration of epithelial cell morphology in the fusion area. These results suggest that temporal disappearance of the EGF/EGF-R signaling from presumptive fusion of the nasal prominences is required for morphological change of the epithelial cells leading to the fusion of MNP and LNP.

鼻部基底細胞癌の治療戦略

Basal cell carcinoma (BCC) occurs and recurs most commonly on the nose. The authors conducted a study to establish reliable guidelines for resecting BCC on the nose. During a 20-year period from 1981 to 2000, the authors experienced 88 cases of BCC, in 37 (42%) of which tumor cells were found histologically to invade muscle layers. The authors propose the following methods of adequate excision and reconstructions in different areas of the nose.Part I: Nasal ala (7 aggressive, 5 non-aggressive) . Full-depth or submucosal excision and one-step reconstruction by free composite graft is recommended.Part II: Nasal groove (24 aggressive, 3 non-aggressive) . A two-step procedure. The tumor, including part of the muscle, should be excised. After complete removal of the tumor has been confirmed histologically, the defect should be reconstructed by naso-labial flap.Part III: Lateral side of nasal dorsum (3 aggressive, 20 non-aggressive) . The tumor may be excised in a one-step procedure. It is desirable to cover the defect by naso-labial flap.Part IV: Nasal dorsum (3 aggressive, 18 non-aggressive) . The tumor may be excised below SMAS and the defect should be covered by axial frontonasal flap.Part V: Nasal tip and Columella (5 non-aggressive) . This area should be considered as a dangerous zone. A two-step procedure is recommended. [Skin Cancer (Japan) 2003; 18: 278-289]

Naso mcdadei, a new species of unicornfish (Perciformes : Acanthuridae), with a review of the Naso tuberosus species complex

An immaculate square-nosed acanthurid fish of the genus Naso, previously misidentified as N. tuberosus, is described as a new species, N. mcdadei. The species is widespread, but appears uncommon, being known from only 10 specimens and five underwater photographs. It is described from specimens from tropical eastern and western Australia, southern Indonesia, Mauritius, and Natal, South Africa. Its occurrence is confirmed from off western Sumatra, the Maldives, Chagos Archipelago and southern Taiwan by photographs. It differs from N. tuberosus (Lacèpede, 1801) and N. tonganus (Valenciennes, 1835) most notably through smaller, more numerous teeth and a generally uniform greyish colouration. The head, body and fins all lack numerous small dark spots that are variously present in the latter two species. In adults, it also differs through a squarish rather than rounded tuberosity on the snout, a shorter straighter nasal groove, lack of a discernible hump in the dorsal profile, smaller-scale tubercles, non-prominent jaws, and first rather than last dorsal spine longest.The species previously recognised as N. tuberosus is split into two closely related taxa, N. tonganus (Valenciennes) from the western Pacific and Indian Oceans and N. tuberosus Lac�pede from the central and western Indian Ocean. These species differ mainly in the size and shape of the nasal tuberosity, dorsal profile, body depth, and colouration.

Congenital nasal comedones - report of three cases

We report on three patients with black or white comedones arranged along the nasal groove in the distal third of the nose between the alar and triangular cartilages. This peculiar disorder is probably more common than would appear from the small number of cases so far reported in the literature.

Multiple Applications of GoreTex Soft Tissue Patch in Facial Plastic Surgery

This communication reveals multiple uses, versatility, predictability, and excellent tissue compatibility of GoreTex® membrane in facial plastic surgery. An outline of the technique relying on subcutaneous undermining as opposed to the threading method is provided. Five-year experience (in more than 127 patients) with the GoreTex soft tissue patch demonstrates good tolerance to implants up to 8 mm in thickness and 10 cm2 in area as a tissue filler in the face and neck region. No functional impairment has been documented with the use of large implants to correct nasal labial grooves or in lip augmentation.

Milia cysts along the nasal groove in a child

The occurrence of transverse linear milia cysts over the dorsum of the nose in an 11-year-old girl is described. Two younger sisters of the proband had a conspicuous nasal groove at the same site without milia. The anatomical basis and the pathogenesis of the so-called 'transverse nasal crease' are reviewed.

Evolution ofNaso thynnoides and the status ofN. minor (Acanthuridae; Actinopterygii)

Naso minor was described from a single specimen (Smith, 1966). Only one other specimen has since been reported (Randall, 1986). The species apparently differed fromN. thynnoides in the ratio of fork length to head length and eye diameter, the shape of the caudal peduncle spine, and in number of dorsal spines. Collections of 24 specimens of four- and five-spined individuals (putatively assigned to both species) from the Philippines revealed that the first three differences are not valid. However, spine number, the length of the nasal groove, the pigmentation of the basal plate of the caudal peduncle spine, and the morphology of the first dorsal-fin pterygiophore confirm the distinctness of the two species.

Newly recognized syndrome of cerebral, ocular, dental, auricular, skeletal anomalies: CODAS syndrome—a case report

We report on a child with a unique constellation of congenital anomalies suggesting a new syndrome. These consist of developmental delay; craniofacial abnormalities, including bilateral cataracts, ptosis, median nasal groove, malformed ears with associated neurosensory hearing loss; dental anomalies consisting of anomalous cusp morphology with unusual pointed extensions and delayed tooth eruption; short stature with marked delay in epiphyseal ossification; coronal clefts involving vertebrae T11-S2; and dislocated hips. A literature search and use of a computer-assisted syndrome-identification program failed to uncover an identical case.

Morphometric and autoradiographic analysis of frontonasal development in the chick embryo.

Dimensional changes in the nasal processes were measured in chick embryos from Hamburger and Hamilton (1951) stages 20 through 27.5. Transverse measurements in the frontonasal region of freshly fixed embryos were compared to frontal sections of the nasal region of comparably staged embryos. These observations were correlated with autoradiographic studies of cell movement employing an implant labeling technique. Morphometric analysis indicated that between stages 20 and 25 the separation of the nasal pit orifices increased coincidentally with rapid forebrain enlargement. Since the separation of the nasal pit fundi increased more rapidly, the orientation of the nasal pits changed. Autoradiographic studies indicated that lateral movement of medial nasal process mesenchyme into the base of the nasal groove and medial area at the base of the lateral nasal process had occurred. After stage 25, the separation of the nasal orifices declined dramatically, coincidental with rapid orbital enlargement. In contrast, the separation of the nasal pit fundi was maintained. It is proposed that nasal development of the chick embryo may be governed initially by forebrain enlargement and associated lateral movements of mesenchyme in the medial nasal processes, resulting in reorientation of the invaginating nasal placodes; subsequently, orbital enlargement and an associated medial redirection of growth of the lateral nasal processes assumes greater significance to the continued development of the frontonasal region.

Hypertelorism and the median cleft face syndrome. An embryological analysis.

A microscopical study of the early and late development of the face was performed in 77 human embryos and fetuses. After the transformation of both nasal placodes, via nasal grooves, into the nasal tubes the ectoderm of the face is closed superficially and the early development of the face (less than or equal to 17 mm crown-rump length (C-RL)) is terminated. Between the nasal tubes the internasal groove is present. Furthermore these embryos show physiologically a flat nose and hypertelorism. During the late development (greater than or equal to 17 mm C-RL) of the face the internasal groove disappears due to the outgrowth and differentiation of the nasal septum in the frontocaudal direction. Simultaneously (17-27 mm C-RL) the distance between the eyes decreases relatively, because of a relative lag in transverse growth. The differentiation of the facial mesenchyme into bone centres starts in the same period. From this embryological point of view the major anomalies of the median cleft face syndrome (hypertelorism--orbital as well as interorbital--and cranium bifidum occultum, median cleft nose, median cleft prolabium and median cleft premaxilla), can be classified as secondary or late, i.e., differentiation, defects.