EMPTY SELLA SYNDROME FOLLOWING CRANIAL TRAUMA IN A DOG

Background/Aim: Empty sella is a radiological finding characterized by the presence of arachnoid herniation into the sella, resulting in compression of the pituitary against the sella wall. The objective of this case presentation is to discuss secondary empty sella in a patient with spontaneous resolution of a pituitary macroadenoma. Methods: A case of empty sella syndrome is presented. Static and dynamic testing was performed. Etiology, pituitary function, and imaging are discussed. Results: A 69-year-old African-American woman was referred by her primary care physician for evaluation and treatment of ‘hypothyroidisim’. Thyroid tests were performed because of muscle and joint tenderness and revealed low free thyroxine and normal thyroid-stimulating hormone levels. The diagnosis of secondary hypothyroidism was made, and magnetic resonance imaging (MRI) of the pituitary revealed an empty sella turcica. In retrospect, the patient had presented 11 years earlier with tinnitus, and an MRI of her auditory canals demonstrated an ‘incidental’ 1.5-cm pituitary tumor. No endocrine evaluation was done at that time, and neurosurgical follow-up of the pituitary tumor by serial MRIs demonstrated the genesis into empty sella. Conclusions: In our patient the natural history of her pituitary tumor was that it involuted and resulted in an empty sella. Although oftentimes speculated as a cause of empty sella, tumor involution has rarely been shown to be causative. In this instance, empty sella was associated with hypopituitarism. This case illustrates the importance of endocrine evaluation of patients with this radiological finding.

Several computed tomographic scan studies have described empty sellae in children with hypothalamic-pituitary disorders. Magnetic resonance imaging, however, is a more precise technique for visualizing the intrasellar content, such as the stalk and pituitary lobes. Using magnetic resonance imaging, we studied 339 children and adolescents (mean age +/- SD, 12.7 +/- 4.5 yr) with possible hypothalamic-pituitary disorders to ascertain the frequency of primary empty sella and examine its relationships with other intrasellar abnormalities, pituitary function, and adverse perinatal events. One hundred and ninety-three patients had isolated GH deficiency, 43 had multiple pituitary hormone deficiency, 10 had diabetes insipidus, 17 had hypogonadotropic hypogonadism, 5 had idiopathic delayed puberty, 47 had precocious puberty, and 24 had other hypothalamic pituitary disorders of hyperfunction. One tenth (10.9%) of the patients (37 cases) had empty sella, with a marked variation of incidences among the disorders listed above. A statistically higher frequency of subjects with empty sellae was found only in patients with multiple pituitary hormone deficiency. Patients with and without empty sellae were not different in regard to age or sex. The incidence of empty sella in the various groups of patients was as follows: isolated GH deficiency, 8.8% (17 cases); multiple pituitary hormone deficiency, 34.9% (15 cases); hypogonadotropic hypogonadism, 5.9% (1 case); idiopathic delayed puberty, 40% (2 cases); and precocious puberty, 4.2% (2 cases). No patients with isolated diabetes insipidus or other hypothalamic-pituitary disorders had empty sellae. In the patients with empty sellae, abnormalities of the stalk or posterior lobe were found in 1 patient with isolated GH deficiency (5.9%), 13 patients with multiple pituitary hormone deficiency (86.7%), and no patients with puberty disorders. Likewise, adverse perinatal events were found only in 1 patient with isolated GH deficiency and 9 patients with multiple pituitary hormone deficiency. These findings suggest that empty sella is not rare in children and adolescents evaluated for hypothalamic-pituitary disorders, particularly if there is multiple pituitary hormone deficiency. Empty sella can be found regardless of abnormalities of the stalk and posterior lobe, and adverse perinatal events do not seem to be the primary etiological factor. Empty sella is usually associated with pituitary hypofunction, but it can be found in patients with hyperfunction of the hypothalamic-pituitary-gonadal axis.

BACKGROUNDEmpty sella syndrome is a condition in which the pituitary gland shrinks or flattens. Patients with empty sella syndrome often present with headache, hypertension, obesity, visual disturbances, cerebrospinal fluid (CSF) rhinorrhoea, or endocrine dysfunction. Herein, we report a rare case of empty sella syndrome discovered after the patient experienced postoperative hypotension and respiratory failure.CASE SUMMARYA 60-year-old man was admitted for further workup of left shoulder pain. He was assessed by the orthopaedics team and booked for internal fixation of the left clavicle. General anaesthesia with a nerve block was administered. His blood pressure continued to decrease post-operation. Endocrine tests were performed, with the results supporting a diagnosis of hypopituitarism with hypocortisolism and hypothyroidism. Brain magnetic resonance imaging demonstrated that the sella was enlarged and filled with CSF, confirming a diagnosis of empty sella syndrome. The patient was started on endocrine replacement therapy. The patient regained consciousness and spontaneous breath finally.CONCLUSIONThis case highlights the importance of considering pituitary hormone insufficiency in the context of respiratory and hemodynamic failure during the perioperative period.

Empty Sella (ES) occurs when the subarachnoid space is herniated into the Sella Turcica (ST). ES may be radiologically determined randomly, and patients with ES are usually asymptomatic. However, approximately 20% of partial ES (PES) cases can be symptomatic. Therefore, it is essential to diagnose patients with ES accurately for treatment. We studied whether there was a difference in ST dimensions between patients with ES and healthy individuals using magnetic resonance imaging (MRI), and we compared a group of measurements using computed tomography (CT). 212 patients with ES and 98 healthy individuals participated in this study and underwent cranial 3T MRI. We divided the study population into three groups: the PES, total ES (TES), and control groups. We placed the patients who underwent both cranial MRI and paranasal CT in a separate group. The aperture, height, and length of the ST of all subjects were measured. MRI and CT showed that the length, height, and aperture diameters of the ST were statistically significantly different between the PES, TES, and control groups (p<0.05). In receiver operating characteristic analysis, the cut-off values for the length, height, and aperture measurements were 12.05 mm, 8.35 mm, and 9.65 mm, respectively. The dimensions of the ST expand in patients with ES, and we found a reliable threshold value for this expansion. CT taken for unrelated reasons may be used in the diagnosis of ES by measuring the dimensions of the ST.

Sir, Busch described the condition empty sella syndrome (ESS) in 1951 where the sella turcica is filled with cerebrospinal fluid (CSF) causing displacement or flattening of the normal pituitary gland.[1] It is reported to occur in 5.5%–23.5% of the population[2] which is pathophysiologically characterized by either anatomic abnormalities in the diaphragma sellae (primary ESS) or damage to the pituitary by irradiation/surgery, or autoimmunity leading to the availability of “empty” space in the sella (secondary ESS).[1] The common signs and symptoms includes headache, papilledema due to raised intracranial pressure, leakage of CSF through nose and weight gain.[1] It can also present as decreased libido, galactorrhea, amenorrhea and secondary infertility.[3] Psychiatric manifestations of ESS are rare but can occur in the form of behavioral disturbances and psychotic symptoms.[4,5] A 25-year-old male presented to us with violent behavior towards family members, reduced need for sleep, elevated self-esteem and grandiose delusions claiming himself to be the prime minister of India. It was associated with one episode of tonic–clonic movements two nights back, with urinary incontinence. Patient also complained of jerky movements in his left arm occasionally about two to three times a day following this. All the symptoms started abruptly for past 10 days, this being his first such episode in his lifetime. There was no history of any febrile illness, head injury, substance abuse; blood parameters that included serum electrolytes, serum prolactin, vitamin B12 levels, and serum osmolality were all within normal limit. He was diagnosed to be in mania as per Diagnostic and Statistical Manual of Mental Disorders (DSM 5). Young’s Mania Rating Scale (YMRS) score was 24. The patient was subjected to magnetic resonance imaging (MRI) scan which revealed empty sella [Figure 1]. 10–20 electroencephalogram findings revealed generalized periodic epileptiform discharges (GPED). The patient was placed on sodium valproate 1000mg, haloperidol 10 mg and trihexyphenidyl 4 mg in divided dosages. The symptoms reduced in severity and YMRS score came 12 on day 5 of admission and EEG was normal. This was his first episode of mania that coexisted with first lifetime episode of seizure. GPEDs results in kindling of neuronal pathways, leading to psychiatric manifestations such as mania. Lateral hypothalamic kindling can induce manic-like behavior in a rat model.[5]Figure 1: MRI scan showing empty sellaThere are reports of atypical presentations of ESS in the form of acute psychosis, sinus bradycardia, herniation of anterior cerebral artery.[5–7] The presentation of empty sella as seizure episode has been reported rarely.[8] Moreover, it is even more rare to be presenting with both seizure episode and mania.[9] In one case report mania was precipitated by hyponatremia in a patient with ESS[10] whereas in our case sodium and other electrolytes level were in normal range. The possible mechanism of such is still a gray area.[9] Even there is also a dilemma of seizure precipitating mania or vice-versa. More sample based studies is needed to establish the neurochemical events leading to the same for better diagnosis and management. Ethical concerns Proper consent was taken from the patient regarding publication of the case without revealing patient’s identity Financial support and sponsorship Nil. Conflicts of interest There are no conflicts of interest.

Empty Sella syndrome (ESS) is characterized by the sella turcica being filled with cerebrospinal fluid (CSF), leading to partial or total compression of the pituitary gland, often resulting in hormonal deficiencies. It can be primary or secondary. In patients presenting with complaints of generalized weakness and fatiguability, with multiple episodes of prior hospitalizations, a thorough history and evaluation can lead to a diagnosis. We report a case of a 50-year-old lady with recurrent admissions for hyponatremia. Based on biochemical parameters and brain imaging, she was diagnosed to have ESS. We report this case to highlight the various diagnostic challenges associated with panhypopituitarism and the importance of having a high clinical suspicion, as the treatment is simple and lifesaving.

<title>Abstract A 55-year-old male was admitted to emergency department with a hypoglycemic shock of unknown origin. He was presented with tonic seizure activity after admission. Initial diagnostic procedure could exclude diabetes mellitus, drug side effects, and exogenous insulin application. Detailed evaluation of the patient's history revealed that the patient had experienced repeated hypoglycemic episodes for 2 years. He was diagnosed with hypothyroidism six years ago. Initial laboratory investigations revealed hypoglycemia, hyponatremia, and low plasma cortisol level (0.18 pg/dᄂ)· Sellar magnetic resonance imaging showed empty sella. Replacement therapy with hydrocortisone resulted in the improvement of clinical symptoms. Combined pituitary stimulation test with exception of hypoglycemia induced growth hormone and cortisol stimulation test was performed. The response of thyroid stimulating hormone, prolactin, follicle-stimulating hormone, and luteinizing hormone was normal. We report the case of empty sella syndrome associated with hypoglycemic shock due to with multiple anterior pituitary hormone deficiencies.</p>

Hypothalamic-pituitary dysfunction in primary empty sella syndrome in childhood

Endocrine Disturbances in Empty Sella Syndrome: Case Reports and Review of Literature

BackgroundAccording to neuroradiological findings, empty sella seems to be deprived of pituitary tissue in sella turcica. Changing size of the pituitary volume is closely related to the occurrence of primary empty sella. The aim of the study is to determine pituitary dysfunction in patients with partial or total primary empty sella and the significance of pituitary volume measurements in these patients.MethodsThis study was designed retrospectively. 67 patients (55 females, 12 males) diagnosed with primary empty sella syndrome between the years of 2015-2019 were included in the study. Patients were divided into two groups: partial (PES) and total (TES) empty sella by magnetic resonance imaging (MRI). Basal anterior pituitary and its hormones were assessed. We also included 26 healthy control subjects (19 females, 7 males) to compare the differences in pituitary volumes. Volumes were measured by using Osirix Dicom Viewer (Pixmeo SARL, Geneve, Swiss) in 3.0 Tesla scanner MRI.Results82.1% (n=55) of all patients were PES and the others were (n=12) TES. Hypopituitarism, known as one or more pituitary hormones deficiency, was found in 12 patients (17.9%). While 9 of them had total PES, the others had partial PES. Secondary adrenal insufficiency and gonadotropin deficiency were more prevalent in patients with TES. Mean volume measurements of patients with TES, PES and healthy subjects were 0.23±0.17, 0.35±0.15, 0.54±0.17 cm3, respectively. Except for IGF1 values (p=0.026), there was not any significant correlation found between the anterior pituitary hormones and volume measurements.ConclusionAlthough volume measurement has helped in the diagnosis of pituitary empty sella (partial or total), it does not seem to have any significant correlation with pituitary secretory function.

Empty sella syndrome (ESS) is characterized by the herniation of cerebrospinal fluid into the sella, which results in the enlargement of the sella and compression of the pituitary gland. ESS commonly accompanies pituitary dysfunction and abnormal secretion of one or more hormones, which manifests as symptoms like cold intolerance, fatigue, and memory impairment. However, the occurrence of sick sinus syndrome (SSS) in ESS has not been reported. A 66-year-old female patient was admitted to the hospital with complaints of dizziness and fatigue. Electrocardiogram (ECG) revealed sinus arrest, junctional escape rhythm, and a heart rate of 40 bpm. Then, the patient was diagnosed with SSS. Thyroid function test indicated decreased thyroxine levels and slightly elevated thyroid-stimulating hormone levels. Additionally, hyposecretion of cortisol and insulin-like growth factors was observed. Magnetic resonance imaging of the pituitary gland confirmed the diagnosis of ESS. The patient was treated with hydrocortisone and euthyrox, relieving the symptoms of dizziness and fatigue. Thyroid function tests during the follow-up period showed normal hormone levels, and ECG examination revealed no abnormalities.

The purpose of this study was to evaluate the performance of magnetic resonance imaging (MRI) in measuring the optic nerve sheath diameter (ONSD) compared to the established method transorbital sonography (TOS) in patients with idiopathic intracranial hypertension (IIH). Twenty-three patients with IIH were prospectively included applying IIH diagnostic criteria. All patients received a lumbar puncture with assessment of the cerebrospinal fluid (CSF) opening pressure to assure the IIH diagnosis. Measurement of ONSD was performed 3mm posterior to inner sclera surface in B-TOS by an expert examiner, while three independent neuroradiologists took measurements in axial T-weighted MRI examinations. The sella turcica with the pituitary gland (and potential presence of an empty sella) and the trigeminal cavity were also assessed on sagittal and transversal T1-weighted MRI images by one independent neuroradiologist. The means of ONSD between ultrasound and MRI measurements were 6.3mm (standard deviation [SD]=0.6mm) and 6.2mm (SD=0.8mm). The interrater reliability between three neuroradiologists showed a high interclass correlation coefficient (ICC) (confidence interval: .573<ICC<.8;p<.001). In patients with an empty sella, the ONSD evaluated by MRI was 6.6mm, while measuring 6.1mm in patients without empty sella. No correlation between CSF opening pressure and ONSD was found. MRI can reliably measure ONSD and yields similar results compared to TOS in patients with IIH. Moreover, patients with empty sella showed significantly larger ONSD than patients without empty sella.

Disclosure: D. Fawcett: None. S. Ceballos: None. C. Livasky: None. Introduction: Empty sella is a pituitary disorder characterized by the herniation of the subarachnoid space within the sella turcica. It can be further classified as primary empty sella (PES), considered an idiopathic disease or secondary empty sella (SES) which may result after pituitary tumor treatment, spontaneous necrosis, infection, autoimmune disease or brain trauma. Case Description: 47-year-old female with no medical history, who presented to emergency due to a 2-week history of fatigue associated with persistent heart pounding sensation and intermittent holocranial headache. On admission, the patient had sinus tachycardia with a normal blood pressure, and a non-focal neurologic exam. Her initial labs were significant for elevated lactic acid and low TSH. Initially a hyperthyroid etiology was considered, however, thyroid panel obtained on admission showed low T4 level. On further interrogation patient recalled a recent motor vehicle accident (MVA) a month prior to symptoms developing, without medical evaluation at the time. Brain MRI was completed as part of a central etiology work up demonstrating an empty sella with enlargement of the sella turcica measuring 1.6 cm. No contrast enhancing lesions were seen. Endocrinologic work up was consistent with a secondary adrenal insufficiency. Patient was discharged with hormonal thyroid and hydrocortisone supplementation. Discussion: Empty sella is a pituitary disorder in which a herniation of the subarachnoid space within the sella turcica occurs. There are two types: Primary empty sella (PES) which is considered idiopathic and is seen in patients with no history of previous pituitary pathology, and Secondary empty sella (SES) which may result after pituitary tumor treatment such as surgery or radiation, spontaneous necrosis, infection, autoimmune disease or brain trauma. The patient we presented did not have medical history consistent with autoimmune diseases or prior procedures. However, she did report an MVA with head trauma, that did not receive medical attention with subsequent development of headache and rest of previously described symptoms, highly concerning for a possible traumatic etiology. A high level of suspicion is required for diagnosis, particularly in patients with unspecific symptoms in order to improve patient’s prognosis. Presentation: 6/1/2024

To identify possible differences between empty sella in children and adults we studied 43 subjects (age 13.6 +/- 5.4 years, range 4.1-27 years) with hypothalamic-pituitary disorders and empty sella at magnetic resonance imaging. Pituitary function, presence of non-endocrine symptoms, perinatal history, sellar volume, pituitary height, midline or intrasellar anatomical abnormalities were evaluated. Twenty subjects had isolated growth hormone deficiency, 17 multiple pituitary hormone deficiency and 6 puberty disorders (3 precocious puberty, 2 idiopathic delayed puberty, 1 Kallmann syndrome). The group with multiple pituitary hormone deficiency had a higher percentage of subjects with complete empty sella, i.e. pituitary height < 2 mm (p = 0.016), or intrasellar anatomical abnormalities (p = 0.0002) than the other groups. The subjects with puberty disorders had a mean sellar volume higher than the other groups (p < 0.05). Apart from pituitary dysfunction, symptoms of the empty sella syndrome were infrequent (9.3% of cases) in our subjects. The age of our subjects, the frequent association between empty sella and pituitary dwarfism and the non-enlarged sellae suggest a different aetiology, perhaps congenital, for empty sella in our subjects. As in adults, empty sella may be associated with both pituitary hypo- and hyperfunction.

To determine the diagnostic performances of clinical examination and selective magnetic resonance imaging in the evaluation of intraarticular knee disorders in children and adolescents we compared them with arthroscopic findings in a consecutive series of pediatric patients (< or = 16 years old). Stratification effects by patient age and magnetic resonance imaging center were examined. There were 139 lesions diagnosed clinically, 128 diagnosed by magnetic resonance imaging, and 135 diagnosed arthroscopically. There was no significant difference between clinical examination and magnetic resonance imaging with respect to agreement with arthroscopic findings (clinical examination, 70.3%; magnetic resonance imaging, 73.7%), overall sensitivity (clinical examination, 71.2%; magnetic resonance imaging, 72.0%), and overall specificity (clinical examination, 91.5%; magnetic resonance imaging, 93.5%). Stratified analysis by diagnosis revealed significant differences only for sensitivity of lateral discoid meniscus (clinical examination, 88.9%; magnetic resonance imaging, 38.9%) and specificity of medial meniscal tears (clinical examination, 80.7%; magnetic resonance imaging, 92.0%). For magnetic resonance imaging, children younger than 12 years old had significantly lower overall sensitivity (61.7% versus 78.2%) and lower specificity (90.2% versus 95.5%) compared with children 12 to 16 years old. There was no significant effect of magnetic resonance imaging center. In conclusion, selective magnetic resonance imaging does not provide enhanced diagnostic utility over clinical examination, particularly in children, and should be used judiciously in cases where the clinical diagnosis is uncertain and magnetic resonance imaging input will alter the treatment plan.