scholarly journals A Rare Case of Thyrotropin Secreting Pituitary Macroadenoma Primarily Treated With Somatostatin Analogue

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A568-A568
Author(s):  
Arwa Mahmoud Elsheikh ◽  
G Edward Vates ◽  
Ismat Shafiq
Keyword(s):  
Pituitary Adenoma ◽  
Medical Treatment ◽  
Thyroid Function ◽  
Pituitary Adenomas ◽  
Rare Case ◽  
Somatostatin Analogues ◽  
Primary Treatment ◽  
Alpha Subunit ◽  
Somatostatin Analogue ◽  
Pituitary Macroadenoma

Abstract Introduction/Background: Thyrotropin secreting pituitary adenomas (TSH-oma) are a rare cause of hyperthyroidism. They account for <1% of the cases of hyperthyroidism with a reported incidence of 2.8 per 1 million in Sweden. Diagnosis is suspected by the presence of elevated T4 and T3 in the setting of an unsuppressed TSH level. The presence of large pituitary adenoma is highly suggestive of the diagnosis and can be differentiated from thyroid hormone resistance by elevated alpha subunit and SHBG levels. Trans-sphenoidal surgery is the definitive treatment. Peri-operative medical treatment with somatostatin analogues is indicated to achieve euthyroidism and prevent surgical risks and thyroid storm. The use of somatostatin analogues as a primary treatment for TSH-oma is still under investigation. We hereby report a rare case of TSH-oma where somatostatin analogues successfully resulted in normalization of thyroid function and tumor size reduction. Clinical Case: A 61 years old gentleman with a history of hypothyroidism diagnosed three years before presentation to the Pituitary clinic. He was treated with Levothyroxine. On clinical examination, he had mild tremor and warm sweaty palms with no stigmata of Grave’s disease. The thyroid function test showed elevated free T4 of 3.6 ng/dl (0.9-1.7), elevated free T3 of 8.6 pg/ml (2.0-4.4), and a high TSH level of 9.10 μIU/ml (0.27-4.20). His prolactin level was mildly elevated at 24.8 ng/ml(4.0-15.2). Testosterone, IGF-1, and cortisol levels were normal. An MRI of his pituitary gland showed large pituitary macroadenoma with supra-sellar extension and mild compression of the optic nerve. He had an elevated alpha subunit of 5.6 ng/ml (<1.37) and a high SHBG level of 198 nmol/l(10-80). TSH adenoma was diagnosed and he was planned for trans-sphenoidal surgery. Pre-operative treatment with somatostatin analogue Lanerotide 90 mg monthly injection was initiated. Interestingly normal thyroid function was observed approximately 1 month after his first injection. Repeat MRI showed a considerable decrease in the size of the pituitary macroadenoma. The patient opted to hold on to surgery and to continue on medical treatment. His thyroid function remains normal 15 months after initiation of treatment and his MRI continues to show stable pituitary adenoma. Conclusion: Somatostatin analogues can be used as a primary treatment for thyrotropin secreting pituitary adenomas when the patient is unable or unwilling to undergo surgery. It is use is associated with normalization of thyroid function and in some cases with a reduction in the adenoma size.

scholarly journals A Rare Case of a Plurihormonal Pituitary Adenoma

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A565-A565
Author(s):  
Alisha Hossain ◽  
Emily Skutnik ◽  
Arjan Ahluwalia ◽  
Lindor Gelin ◽  
Sonum Singh ◽  
...  
Keyword(s):  
Pituitary Adenoma ◽  
Thyroid Function ◽  
Pituitary Adenomas ◽  
Alpha Subunit ◽  
Histological Evaluation ◽  
Benign Tumors ◽  
Thyroid Function Tests ◽  
Free T4 ◽  
Function Tests ◽  
Suppression Test

Abstract Background: Pituitary adenomas are usually benign tumors that arise from adenophypophyseal cells and produce one or two types of hormones. Plurihormonal adenomas are a rare subtype that produce two or more hormones and represent less than 1% of all pituitary adenomas. Clinical Presentation: A 76-year-old female presented for evaluation of abnormal thyroid function test results. She was found to have an elevated free T4 of 1.92 ng/dL and total T4 of 14.4 ug/dL with an inappropriately normal TSH of 2.11 uIU/mL. Physical examination was significant for tachycardia, tremors, diaphoresis, coarse facial features, and enlarged hands. Further biochemical evaluation of her pituitary hormone levels demonstrated an elevated prolactin (PRL) of 237.2 ng/mL, elevated insulin-like growth factor 1 (IGF-1) of 787 ng/mL, normal morning ACTH of 47 pg/mL, normal morning cortisol of 17.0 ug/dL, an inappropriately suppressed FSH of <5.0 mIU/mL, an elevated alpha subunit of pituitary glycoprotein hormones (PGH) of 6.9 ng/mL, and an elevated free T4 of 3.5 ng/dL by equilibrium dialysis. She underwent an MRI of the pituitary and brain which demonstrated a pituitary adenoma measuring 1.2 x 1.3 x 1.8 cm with a portion herniating into the sella turcica with no mass effect of the optic chiasm. A formal visual field examination was normal. The patient underwent workup for Cushing’s Disease with a low dose overnight dexamethasone suppression test, resulting in an appropriate response with an 8 AM cortisol of <1.0 ug/dL. Glucose suppression test confirmed the diagnosis of acromegaly with growth hormone at 120 minutes of 19.90 ng/mL. Neurosurgery performed a trans-sphenoidal pituitary adenoma resection. Thyroid function tests on post-operative day 4 demonstrated a suppressed TSH of 0.01 uIU/mL and an elevated free T4 of 2.30 ng/dL. Histological evaluation revealed dual expression of transcription factors pituitary-specific positive transcription factor 1 (PIT1) and steroidogenic factor 1 (SF1) as well as PRL, GH, TSH and FSH expression. Immunostaining for LH and ACTH were negative. Post-operative IGF-1 and GH levels were 106 ng/mL and 0.51 ng/mL at 17 weeks, respectively. Post-operative TSH normalized to 0.82 uIU/mL, free T4 normalized to 1.04 ng/dL, and PRL normalized to 8.1 ng/mL at 12 weeks. The patient remained symptom free after successful surgical resection. Discussion: Our case demonstrates the clinical course of a unique patient with clinical and biochemical manifestations of thyroid dysfunction and acromegaly with a pituitary adenoma immunoreactive for GH, TSH, FSH, and PRL. The co-secretion of GH, TSH, PRL, and FSH as well as positivity for the alpha-subunit is extremely unusual. This case emphasizes the importance of considering pituitary abnormalities as a cause for abnormal thyroid function tests.

scholarly journals Effects of combination therapy: somatostatin analogues and dopamine agonists on GH and IGF1 levels in acromegaly

2015 ◽  
Vol 88 (3) ◽  
pp. 310-313 ◽  
Author(s):  
Ana Valea ◽  
Cristina Ghervan ◽  
Mara Carsote ◽  
Andra Morar ◽  
Iulia Iacob ◽  
...  
Keyword(s):  
Pituitary Adenoma ◽  
Combination Therapy ◽  
Dopamine Agonist ◽  
Normal Level ◽  
Dopamine Agonists ◽  
Somatostatin Analogues ◽  
Somatostatin Analogue ◽  
Endocrine Disorder ◽  
Excessive Secretion

 Background and aims. Acromegaly is a complex endocrine disorder caused by excessive secretion of GH, secondary to a GH secreting pituitary adenoma or a mixed pituitary adenoma secreting GH and PRL.Methods. The aim of this study was to evaluate the effects of combination therapy: dopamine agonist and somatostatin analogue on GH and IGF1 levels in a group of 30 patients with acromegaly. Cabergoline in a dose of 2 mg/week and 4 mg/week respectively was associated with Sandostatin LAR in a dose of 20 mg/month and 30 mg/months respectively. Eight patients were treated with Lanreotide 30 mg/week and Cabergoline 2 mg/week and 3 patients were treated with Bromocriptine 10 mg/day and Sandostatin LAR 30 mg/month.Results. Combination therapy: Cabergoline and Sandostatin achieved normal levels of IGF1  in 32% of the patients, better results being obtained after 12 months of treatment in the group treated with 4 mg Cabergoline/week. In 37% of cases the levels of IGF1 decreased by 50% after 12 months of treatment. In the group treated with Cabergoline and Somatuline a normal level of IGF1 was achieved in 25% of patients after 12 months of treatment. The outcome for the group treated with Sandostatin and Bromocriptine was similar to that obtained under Cabergoline 2 mg/week. There was no significant correlation between the level of GH and the type or dose of dopamine agonist used.Conclusions. In conclusion, combination therapy consisting of dopamine agonist and somatostatin analogue achieves a significant reduction of IGF1 levels in patients with mixed adenomas secreting GH and PRL. A decrease in IGF1 levels is directly correlated with the dose of Cabergoline used. 

Giant plurihormonal pituitary adenoma in a child – case study

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Elżbieta Moszczyńska ◽  
Wiesława Grajkowska ◽  
Maria Maksymowicz ◽  
Joanna Malicka ◽  
Mieczysław Szalecki ◽  
...  
Keyword(s):  
Pituitary Adenoma ◽  
Middle Cranial Fossa ◽  
Thyroid Stimulating Hormone ◽  
Somatostatin Analogue ◽  
Tall Stature ◽  
Pituitary Macroadenoma ◽  
Hand Tremor ◽  
Cranial Fossa ◽  
Magnetic Resonance Imaging Mri ◽  
Plurihormonal Pituitary Adenoma

Abstract Objectives To describe the case of a 12-year-old girl with a rare plurihormonal pituitary macroadenoma secreting prolactin (PRL), growth hormone (GH), thyroid-stimulating hormone (TSH), and alpha subunit (α-SU). Case presentation The patient experienced recurrent headaches and progressing loss of vision in one eye. During the examination, abnormalities such as tall stature, coarse facial features, enlarged feet and hands, tachycardia, hand tremor, hyperhidrosis, galactorrhea, and goiter were observed. Head magnetic resonance imaging (MRI) revealed a solid tumor in the anterior and middle cranial fossa, measuring 80 × 50 × 55 mm. A stereotactic biopsy revealed plurihormonal Pit-1 positive pituitary adenoma secreting PRL, GH, and TSH. A pituitary hyperfunction with PRL, GH, TSH, and α-SU excess was diagnosed. The patient was successfully treated pharmacologically with dopamine agonists and somatostatin analogue, and a decrease of tumor volume (30%) was achieved. Conclusions When neurosurgery is not possible, long-term pharmacological treatment of plurihormonal pituitary macroadenoma can be a safe and relatively effective alternative.

scholarly journals Germline mutations of AIP gene in somatotropinomas resistant to somatostatin analogues

2013 ◽  
Vol 168 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Josep Oriola ◽  
Tomás Lucas ◽  
Irene Halperin ◽  
Mireia Mora ◽  
Ma José Perales ◽  
...  
Keyword(s):  
Pituitary Adenomas ◽  
Conventional Treatment ◽  
Poor Response ◽  
Germline Mutations ◽  
Somatostatin Analogues ◽  
Age At Diagnosis ◽  
Somatostatin Analogue ◽  
Endocrine Tumors ◽  
Peg Treatment ◽  
Aip Gene

ObjectiveMost cases of familial isolated pituitary adenomas with mutated aryl hydrocarbon receptor-interacting protein (AIP:HGNC:358) gene develop somatotropinomas. They are characterised by an aggressive clinical phenotype including early age at diagnosis, large tumours and frequent invasiveness. There is little information on AIP gene mutations' prevalence in isolated somatotropinomas characterised by poor response to somatostatin analogue treatment. The aim of this study was to investigate the prevalence of AIP mutations in non-familial cases of somatotropinomas with poor response to conventional treatment.Design and methodsFifty patients with acromegaly (22 males/28 females, age 51±18 years) and 60 controls were included in this study performed at eight University Hospitals in Spain. None had family history of pituitary adenomas or other endocrine tumors. All patients failed to respond to conventional treatment including surgery and somatostatin analogues. Some patients received adjuvant radiotherapy and most cases required pegvisomant (PEG) treatment for normalisation of IGF1. AIP analysis was performed in DNA extracted from peripheral leucocytes, using standardised PCR protocol in which the coding regions of exons 1, 2, 3, 4, 5 and 6 were amplified. Possible deletions/duplications were studied using multiplex ligation-dependent probe amplification.ResultsSequence changes of potential different significance that could be considered as mutations or variations of unknown significance (VUS) of the AIP gene were found in four patients (8%). In two cases, two different mutations previously described were found: p.Arg9Gln and p.Phe269Phe. Two other VUS were also found: c.787+24C>T in intron 5 and c.100-18C>T in intron 1. Age at diagnosis ranged from 21 to 50 years old, and in all patients, the tumor was a macroadenoma depicting IGF1 normalisation under PEG treatment.ConclusionsAIP germline mutations show a low, but non-negligible, prevalence in non-familial acromegaly patients with tumors resistant to treatment with somatostatin analogues.

scholarly journals A Rare Corticotroph-Secreting Tumor with Coexisting Prolactin and Growth Hormone Staining Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Subramanian Kannan ◽  
Susan M. Staugaitis ◽  
Robert J. Weil ◽  
Betul Hatipoglu
Keyword(s):  
Growth Hormone ◽  
Transcription Factors ◽  
Pituitary Adenoma ◽  
Pituitary Adenomas ◽  
Rare Case ◽  
Pituitary Hormones ◽  
Review Literature ◽  
Pituitary Cells ◽  
Biological Mechanisms

Pituitary adenomas can express and secrete different hormones. Expression of pituitary hormones in nonneoplastic pituitary cells is regulated by different transcription factors. Some pituitary adenomas show plurihormonal expression. The most commonly reported plurihormonal adenomas are composed of somatotrophs, lactotrophs, thyrotrophs and gonadotrophs. Pituitary adenomas composed of both corticotroph and somatolactotroph secreting cells are not common because transcription factors regulating the expression of these hormones are different. We report a rare case of pituitary adenoma with concomitant corticotroph, prolactin, and growth hormone staining cells, review literature on similar cases, and discuss possible biological mechanisms underlying these plurihormonal tumors.

scholarly journals SAT-276 Co-Secreting TSH and Growth Hormone Pituitary Adenoma

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Hatem Eid
Keyword(s):  
Growth Hormone ◽  
Pituitary Adenoma ◽  
Pituitary Adenomas ◽  
Case Reports ◽  
Somatostatin Analogs ◽  
Signs And Symptoms ◽  
Pituitary Hormones ◽  
Oral Glucose ◽  
Pituitary Macroadenoma ◽  
Α Subunit

Abstract Introduction: Secreting pituitary adenoma is exceedingly rare. Less than 15 cases having been reported. Its clinical presentation and diagnosis is challenging. We report a case of pituitary macroadenoma, with features of acromegaly and hyperthyroidism. Case report: A 75 years’ old man presented with new onset atrial fibrillation. He had high FT4 with normal TSH. His ultrasound scan of the neck showed a solitary nodule. He had ablation twice and was started on bisoprolol and anticoagulant. He had MRI scan for headaches and this showed a pituitary macroadenoma. He had high IGF-1. His oral glucose tolerance showed failure of GH suppression. His FT4 was persistently high with normal TSH and he had high a subunits. This suggested the diagnosis of TSH and GH secreting pituitary adenoma. Discussion: TSH-secreting pituitary adenomas are rare and not uncommonly, they co-secrete other pituitary hormones including growth hormones. Somatotrophs and lactotrops share common transcription factors with thyrotrophs. TSH-secreting adenomas are benign but 60% of them are locally invasive. TSH-secreting pituitary adenomas typically present with either symptoms of tumor growth like headache or visual field disturbance or symptoms of hyperthyroidism. Thyroid nodules are common in patients with TSHomas. In patients with TSH-secreting pituitary adenomas, majority will need only surgery and radiation. The medical treatment used to normalize TSH and FT4 levels is somatostatin analogs. This is effective in about 90% of patients with TSH secreting pituitary adenomas TSHoma should be differentiated from resistance to thyroid (RTH). The main difference between TSHoma and RTH is the presence of signs and symptoms of hyperthyroidism in patients with TSHoma, absence of a family history, normal thyroid hormone levels in family members, and the presence of an elevated glycoprotein α-subunit in patients with pituitary tumor. Reference: H Adams and D Adams. A case of a co-secreting TSH and growth hormone pituitary adenoma presenting with a thyroid nodule. EDM case reports 2018 [email protected]

scholarly journals A luteinizing hormone-, alpha-subunit- and prolactin-secreting pituitary adenoma responsive to somatostatin analogs: in vivo and in vitro studies

2001 ◽  
pp. 35-41 ◽  
Author(s):  
A Saveanu ◽  
I Morange-Ramos ◽  
G Gunz ◽  
H Dufour ◽  
A Enjalbert ◽  
...  
Keyword(s):  
Cell Culture ◽  
Pituitary Adenoma ◽  
Luteinizing Hormone ◽  
Somatostatin Analogues ◽  
Alpha Subunit ◽  
Receptor Subtypes ◽  
Culture Studies ◽  
Long Term Treatment

OBJECTIVE: Evaluation of the efficiency of somatostatin analogues in the treatment of a mixed luteinizing hormone (LH)-, alpha-subunit-, prolactin (PRL)-secreting pituitary adenoma. DESIGN: A 30-year-old woman, with amenorrhaea-galactorrhaea, presented with a pituitary macroadenoma. The endocrine evaluation showed high plasma levels of PRL, LH, and alpha-subunit inhibited by 65%, 65% and 33% respectively under octreotide test (200 microg, s.c.). Long-term treatment with slow release (SR) lanreotide (30 mg/10 days, i.m.) restored menstrual cycles and normalized PRL values. Due to persisting supranormal levels of LH and alpha-subunit, and to the absence of tumoral shrinkage, the adenoma was resected by the transsphenoidal route. METHODS: In vitro characterization of the somatostatin receptor subtypes (SSTR) expression and functionality. Real-time polymerase chain reaction was performed to quantify the expression of SSTR mRNAs and functionality of the SSTRs was assessed in cell culture studies with various concentrations of native somatostatin (SRIF-14) and of analogues preferential for SSTR2 or SSTR5. RESULTS: This adenoma presented with high levels of SSTR2, SSTR3 and SSTR5 mRNAs, as compared with a series of gonadotroph adenomas. In cell culture studies, PRL, LH and alpha-subunit were inhibited by 60%, 47% and 33% respectively by SRIF-14 at a concentration of 10 nmol/l. The SSTR2 (BIM-23197, lanreotide) and SSTR5 (BIM-23268) preferential analogues both produced a partial 21-38% inhibition of PRL, LH, and alpha-subunit release. DISCUSSION: In this plurihormonal-secreting adenoma, the high efficacy of somatostatin analogues to inhibit PRL, LH and alpha-subunit secretion in vivo may be explained by the unusually high level of expression and by the functionality of both SSTR2 and SSTR5 receptor subtypes.

scholarly journals Thyrotropin-Secreting Pituitary Adenoma Successfully Treated With Cabergoline

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A967-A968
Author(s):  
Aisha R Saand ◽  
Monica Flores ◽  
Sura Alqaisi ◽  
Ossama Lashin
Keyword(s):  
Pituitary Adenoma ◽  
Medical Treatment ◽  
Pituitary Adenomas ◽  
Reference Range ◽  
Clinical Manifestations ◽  
Alternative Form ◽  
Thyroid Function Tests ◽  
Invasive Treatment ◽  
Α Subunit

Abstract Background: Thyrotropin secreting pituitary adenomas (TSH-oma) account for less than 1% of pituitary adenomas and are a rare cause of hyperthyroidism. In this case, we describe the safe use of cabergoline with the subsequent achievement of euthyroid levels and the resolution of symptoms. Clinical Case: A 67-year-old female with a presumed history of hypothyroidism for the last 3 years managed with Armour thyroid was referred for fatigue associated with palpitations, intermittent diarrhea, insomnia, and anxiety. Her TSH was noted to be suppressed at that time, and her Amour thyroid was changed to Levothyroxine 25 mcg daily, which was eventually stopped as her symptoms persisted. Follow-up thyroid function tests (TFTs) showed elevated TSH (8.60 µU/mL, reference range 0.340 - 5.600 µU/mL), and elevated free T3 (10.8 pg/mL, reference range 2.7-4.7 pg/mL) and free T4 (2.0 ng/dL, reference range 0.8-1.5 ng/dL) levels. Further laboratory workup including basal prolactin, LH, FSH, hCG α-subunit, IGF-1, and ACTH levels were within the normal range. Physical examination showed diffuse thyroid enlargement. An I-123 thyroid uptake and scan showed uniform uptake throughout the gland with no focal hyperintense areas. A dedicated pituitary MRI was performed and revealed an 8 mm microadenoma in the posterior left adenohypophysis. The patient wanted to avoid any invasive treatment and refused trans-sphenoidal surgery and medical therapy was chosen. Unfortunately, using a somatostatin analog as part of the standard medical treatment was not an option due to the high cost and lack of insurance coverage. For these reasons, a trial of cabergoline was started to suppress TSH secretion. Atenolol 25 mg daily was added temporarily for the management of her sympathetic symptoms. On periodic follow-up, her symptoms gradually subsided, and TFTs remained within normal limits. Treatment was continued for one year. Conclusion: Clinical manifestations of hyperthyroidism with biochemical evidence of elevated thyroid hormone levels and TSH levels should raise a strong suspicion for central or secondary hyperthyroidism due to TSH secreting pituitary adenoma. Cabergoline might represent an effective alternative form of medical treatment for TSH-oma in certain situations where the first line therapeutic options are refractory, contraindicated, or declined.

scholarly journals Is MRI follow-up relevant in patients with GH-secreting pituitary adenomas primarily treated and responsive to long-acting somatostatin analogues (SMSa)?

2020 ◽  
Vol 182 (1) ◽  
pp. 123-130
Author(s):  
Naia Grandgeorge ◽  
Giovanni Barchetti ◽  
Solange Grunenwald ◽  
Fabrice Bonneville ◽  
Philippe Caron
Keyword(s):  
Pituitary Adenoma ◽  
Visual Field ◽  
Pituitary Adenomas ◽  
First Generation ◽  
Somatostatin Analogues ◽  
Hormonal Control ◽  
Tumor Shrinkage ◽  
Normal Visual Field ◽  
Long Acting

Objective Primary SMSa treatment can be associated with hormonal control and tumor shrinkage in patients with GH-secreting pituitary adenomas. The aim of this study was to evaluate whether regular MRI follow-up was necessary in patients with acromegaly-treated and responsive to first-generation long-acting SMSa. Patients and methods In this retrospective monocentric study we included patients with GH/IGF-1 hypersecretion and pituitary adenomas with normal visual field, primarily treated with first-generation long-acting SMSa between 1995 and 2015 and regularly monitored (clinical evaluation, GH/IGF-1 levels and pituitary MRI) for at least 3 years. Results We included 83 patients (32 men and 51 women, mean age at diagnosis 50 ± 12 years) with mean GH = 19.3 ± 25.6 ng/mL, IGF-1 = 284 ± 110% ULN and pituitary adenoma height = 12.9 ± 4.7 mm. Mean follow-up was 8.9 ± 4.9 years in 36 controlled patients and 2.0 ± 1.6 years in 47 partial responders to SMSa alone. No significant increase in pituitary adenoma height was observed. Pituitary adenoma height decreased significantly in controlled patients (diagnosis: 11.9 ± 4.8 mm, SMSa: 9.6 ± 3.3 mm, P < 0.001), and in partially responders (diagnosis: 13.6 ± 4.5 mm, SMSa: 11.5 ± 4.5 mm, P < 0.001). Conclusion During SMSa treatment, no significant increase in GH-secreting adenoma size was observed. Primary SMSa treatment was associated with a significantly decrease in adenoma height in our population. Our cohort data suggest that regular MRI follow-up does not seem relevant in patients with acromegaly who are responsive to SMSa treatment.

scholarly journals MON-313 Thyrotropin-Secreting Pituitary Tumors: Clinical Features, Diagnostic Criteria and Treatment Outcomes in 28 Patients

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Diana A Dimitrova ◽  
Evgeniy T Abdullin ◽  
Elena G Przhiyalkovskaya ◽  
Andrey Yu. Grigoriev ◽  
Vilen N Azizyan ◽  
...  
Keyword(s):  
Pituitary Adenoma ◽  
Thyroid Hormones ◽  
Medical Treatment ◽  
Combined Treatment ◽  
Laboratory Data ◽  
Clinical Manifestations ◽  
Case Series ◽  
Pituitary Tumors ◽  
Mean Value ◽  
Somatostatin Analogue

Abstract Introduction Thyrotropin-secreting pituitary adenoma (TSH-oma) is a rare cause of thyrotoxicosis and represents 0.5-3% of all pituitary adenomas. Given the rarity of the disease and the lack of extensive clinical experience in world practice, the analysis of each case of TSH-secreting pituitary tumors is extremely relevant. Materials and methods: We enrolled consecutive patients with TSH secreting pituitary adenoma. TSH (0,25-3,5 mIU/L), FT4 (9-20 pmol/l) FT3 (2,5-5,5 pmol/l) were measured by Architect i2000SR (Abbott Laboratories, Abbott Park, Illinois, U.S.A). An octreotide test consisted of injecting short-acting somatostatin analogue (SSA) at a dose of 100 μg 3 times a day subcutaneously during 3 days or long-acting SSA 20 mg in 28 days minimum for two months and measuring thyroid profile blood tests before and at the end of the test. MRI was performed on GE Optima MR450w 1.5T. Results: We present 28 case series with TSH-omas followed in our center from 2010 to 2019, the median age - 46 (from 10 to 71 years) with a predominance of a female (21 cases) over a male (7 cases). Clinical manifestations included cardiac arrhythmias (82.1%), neurological changes (60.7%), visual impairment (39.3%), osteoporosis (28.6%), hypopituitarism (7.1%). At first admission, 17 patients had increased TSH, FT3 and FT4; in 7 patients - FT3 and FT4 only, and in 4 - an increase was in one of the hormones; mean value of TSH was 5,04 mIU/L, FT4 - 24,46 pmol/l, FT3 - 8,9 pmol/l. SSBG, CTx, osteocalcin were elevated in 60.9%, 57.9% and 31.6% of cases, respectively. In 88.5% of cases octreotide test led to thyroid hormones normalization. On MRI macroadenomas was registered in 67.9%. In 12 patients, diagnosis was confirmed by immunohistochemical examination. In 12 patients, the diagnosis verification was based on remission after surgical and medical treatment. In the remaining four cases, the diagnosis was made on clinical and laboratory data, however, confirmation was inconceivable due to inefficacy of medical treatment. Remission was achieved in 23 patients: 17 of 21 after neurosurgery (81%), 3 of 7 after primary administration of SSA, and 3 after administration of SSA after surgery (100% remission in cases of combined treatment and 42.9% of monotherapy); 3 out of 5 patients who did not achieve remission were lost for observation. Two patients died: in one case due to the brain herniation and cachexia in active thyrotoxicosis. In second case, the patient developed a mental disorder (catatonia) after the second transphenoidal adenomectomy, which led to death. Conclusion The diagnosis of TSH-oma should be based on all thyroid hormones assessment, since biochemical thyrotoxicosis can manifest itself in various ways. The most effective treatment is transphenoidal adenomectomy. If a neurosurgery is not effective or contraindicative, preoperative preparations SSA can be used.

Sign in / Sign up

Export Citation Format

Share Document