Diagnosis and Treatment > Medication

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Jose León Mengíbar Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Ismael Capel Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Teresa Bonfill Medical Oncology Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Isabel Mazarico Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Laia Casamitjana Espuña Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Assumpta Caixàs Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Mercedes Rigla Endocrinology and Nutrition Department, Parc Taulí University Hospital, Sabadell, Barcelona, Spain

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Summary

Durvalumab, a human immunoglobulin G1 kappa monoclonal antibody that blocks the interaction of programmed cell death ligand 1 (PD-L1) with the PD-1 and CD80 (B7.1) molecules, is increasingly used in advanced neoplasias. Durvalumab use is associated with increased immune-related adverse events. We report a case of a 55-year-old man who presented to our emergency room with hyperglycaemia after receiving durvalumab for urothelial high-grade non-muscle-invasive bladder cancer. On presentation, he had polyuria, polyphagia, nausea and vomiting, and laboratory test revealed diabetic ketoacidosis (DKA). Other than durvalumab, no precipitating factors were identified. Pre-durvalumab blood glucose was normal. The patient responded to treatment with intravenous fluids, insulin and electrolyte replacement. Simultaneously, he presented a thyroid hormone pattern that evolved in 10 weeks from subclinical hyperthyroidism (initially attributed to iodinated contrast used in a previous computerised tomography) to overt hyperthyroidism and then to severe primary hypothyroidism (TSH: 34.40 µU/mL, free thyroxine (FT4): <0.23 ng/dL and free tri-iodothyronine (FT3): 0.57 pg/mL). Replacement therapy with levothyroxine was initiated. Finally, he was tested positive for anti-glutamic acid decarboxylase (GAD65), anti-thyroglobulin (Tg) and antithyroid peroxidase (TPO) antibodies (Abs) and diagnosed with type 1 diabetes mellitus (DM) and silent thyroiditis caused by durvalumab. When durvalumab was stopped, he maintained the treatment of multiple daily insulin doses and levothyroxine. Clinicians need to be alerted about the development of endocrinopathies, such as DM, DKA and primary hypothyroidism in the patients receiving durvalumab.

Learning points:

  • Patients treated with anti-PD-L1 should be screened for the most common immune-related adverse events (irAEs).

  • Glucose levels and thyroid function should be monitored before and during the treatment.

  • Durvalumab is mainly associated with thyroid and endocrine pancreas dysfunction.

  • In the patients with significant autoimmune background, risk–benefit balance of antineoplastic immunotherapy should be accurately assessed.

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Daphne Yau Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Maria Salomon-Estebanez Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Amish Chinoy Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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John Grainger Departments of Paediatric Haematology, Royal Manchester Children’s Hospital, Manchester, UK

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Ross J Craigie Departments of Paediatric Surgery, Royal Manchester Children’s Hospital, Manchester, UK

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Raja Padidela Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Mars Skae Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Mark J Dunne Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK

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Philip G Murray Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Indraneel Banerjee Departments of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK

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Summary

Congenital hyperinsulinism (CHI) is an important cause of severe hypoglycaemia in infancy. To correct hypoglycaemia, high concentrations of dextrose are often required through a central venous catheter (CVC) with consequent risk of thrombosis. We describe a series of six cases of CHI due to varying aetiologies from our centre requiring CVC for the management of hypoglycaemia, who developed thrombosis in association with CVC. We subsequently analysed the incidence and risk factors for CVC-associated thrombosis, as well as the outcomes of enoxaparin prophylaxis. The six cases occurred over a 3-year period; we identified an additional 27 patients with CHI who required CVC insertion during this period (n = 33 total), and a separate cohort of patients with CHI and CVC who received enoxaparin prophylaxis (n = 7). The incidence of CVC-associated thrombosis was 18% (6/33) over the 3 years, a rate of 4.2 thromboses/1000 CVC days. There was no difference in the frequency of genetic mutations or focal CHI in those that developed thromboses. However, compound heterozygous/homozygous potassium ATP channel mutations correlated with thrombosis (R2 = 0.40, P = 0.001). No difference was observed in CVC duration, high concentration dextrose or glucagon infused through the CVC. In patients receiving enoxaparin prophylaxis, none developed thrombosis or bleeding complications. The characteristics of these patients did not differ significantly from those with thrombosis not on prophylaxis. We therefore conclude that CVC-associated thrombosis can occur in a significant proportion (18%) of patients with CHI, particularly in severe CHI, for which anticoagulant prophylaxis may be indicated.

Learning points:

  • CVC insertion is one of the most significant risk factors for thrombosis in the paediatric population.

  • Risk factors for CVC-associated thrombosis include increased duration of CVC placement, malpositioning and infusion of blood products.

  • To our knowledge, this is the first study to evaluate CVC-associated thrombosis in patients with congenital hyperinsulinism (CHI).

  • The incidence of CVC-associated thrombosis development is significant (18%) in CHI patients and higher compared to other neonates with CVC. CHI severity may be a risk factor for thrombosis development.

  • Although effective prophylaxis for CVC-associated thrombosis in infancy is yet to be established, our preliminary experience suggests the safety and efficacy of enoxoaparin prophylaxis in this population and requires on-going evaluation.

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Teresa M Canteros Endocrinology, Metabolism and Nuclear Medicine, Hospital Italinao de Buenos Aires, Buenos Aires, Argentina

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Valeria De Miguel Endocrinology, Metabolism and Nuclear Medicine, Hospital Italinao de Buenos Aires, Buenos Aires, Argentina

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Patricia Fainstein-Day Endocrinology, Metabolism and Nuclear Medicine, Hospital Italinao de Buenos Aires, Buenos Aires, Argentina

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Summary

Severe Cushing syndrome (SCS) is considered an emergency that requires immediate treatment to lower serum cortisol levels. Fluconazole may be considered an alternative treatment in Cushing syndrome when ketoconazole is not tolerated or unavailable. We report a 39-year-old woman with a history of partial pancreaticoduodenectomy due to a periampullary neuroendocrine tumor with locoregional extension. Three years after surgery, she developed liver metastases and was started on 120 mg of lanreotide/month, despite which, liver metastases progressed in the following 6 months. The patient showed extreme fatigue, muscle weakness, delirium, moon face, hirsutism and severe proximal weakness. Laboratory tests showed anemia, hyperglycemia and severe hypokalemia. 24-h urinary free cortisol: 2152 nmol/day (reference range (RR): <276), morning serum cortisol 4883.4 nmol/L (RR: 138–690), ACTH 127.3 pmol/L (RR: 2.2–10). She was diagnosed with ectopic ACTH syndrome (EAS). On admission, she presented with acute upper gastrointestinal tract bleeding and hemodynamic instability. Intravenous fluconazole 400 mg/day was started. After 48 h, her mental state improved and morning cortisol decreased by 25%. The dose was titrated to 600 mg/day which resulted in a 55% decrease in cortisol levels in 1 week, but then had to be decreased to 400 mg/day because transaminase levels increased over 3 times the upper normal level. After 18 days of treatment, hemodynamic stability, lower cortisol levels and better overall clinical status enabled successful bilateral adrenalectomy. This case report shows that intravenous fluconazole effectively decreased cortisol levels in SCS due to EAS.

Learning points:

  • Severe Cushing syndrome can be effectively treated with fluconazole to achieve a significant improvement of hypercortisolism prior to bilateral adrenalectomy.

  • Intravenous fluconazole is an alternative treatment when ketoconazole is not tolerated and etomidate is not available.

  • Fluconazole is well tolerated with mild side effects. Hepatotoxicity is usually mild and resolves after drug discontinuation.

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Tejhmal Rehman Departments of Endocrinology Diabetes and Metabolism, St George’s University Hospitals NHS Trust, London, UK

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Ali Hameed Departments of Endocrinology Diabetes and Metabolism, St George’s University Hospitals NHS Trust, London, UK

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Nigel Beharry Departments of Radiology, St George’s University Hospitals NHS Trust, London, UK

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J Du Parcq Departments of Histopathology, St George’s University Hospitals NHS Trust, London, UK

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Gul Bano Departments of Endocrinology Diabetes and Metabolism, St George’s University Hospitals NHS Trust, London, UK

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Summary

Beta-human chorionic gonadotropin (βhCG) is normally produced by syncytiotrophoblasts of the placenta during pregnancy and aids embryo implantation. However, it is also secreted in varying amounts in non-pregnant conditions commonly heralding a neoplastic process. We present a case of 50-year-old man, who presented with bilateral gynaecomastia with elevated testosterone, oestradiol, suppressed gonadotropins with progressively increasing levels of human chorionic gonadotropin (hCG). Biochemical and radiological investigations including ultrasonography of testes, breast tissue, MRI pituitary and CT scan full body did not identify the source of hCG. FDG PET scan revealed a large mediastinal mass with lung metastasis. Immunostaining and histological analysis confirmed the diagnosis of primary choriocarcinoma of the mediastinum. It is highly aggressive and malignant tumor with poor prognosis. Early diagnosis and management are essential for the best outcome.

Learning points:

  • High βhCG in a male patient or a non-pregnant female suggests a paraneoplastic syndrome.

  • In the case of persistently positive serum hCG, exclude immunoassay interference by doing the urine hCG as heterophilic antibodies are not present in the urine.

  • Non-gestational choriocarcinoma is an extremely rare trophoblastic tumor and should be considered in young men presenting with gynaecomastia and high concentration of hCG with normal gonads.

  • A high index of suspicion and extensive investigations are required to establish an early diagnosis of extra-gonadal choriocarcinoma.

  • Early diagnosis is crucial to formulate optimal management strategy and to minimize widespread metastasis for best clinical outcome.

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Haruhiko Yamazaki Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Japan

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Hiroyuki Iwasaki Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Japan

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Yoichiro Okubo Department of Pathology, Kanagawa Cancer Center, Yokohama, Japan

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Nobuyasu Suganuma Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Japan

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Katsuhiko Masudo Department of Breast and Thyroid Surgery, Yokohama City University Medical Center, Yokohama, Japan

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Hirotaka Nakayama Department of Surgery, Yokohama City University School of Medicine, Yokohama, Japan

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Yasushi Rino Department of Surgery, Yokohama City University School of Medicine, Yokohama, Japan

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Munetaka Masuda Department of Surgery, Yokohama City University School of Medicine, Yokohama, Japan

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Summary

The objective this study is to report two cases of thyroid gland invasion by upper mediastinal carcinoma. Mediastinal tumors are uncommon and represent 3% of the tumors seen within the chest. In reports on mediastinal masses, the incidence of malignant lesions ranged from 25 to 49%. The thyroid gland can be directly invaded by surrounding organ cancers. We report these cases contrasting them to the case of a thyroid cancer with mediastinal lesions. Case 1 was a 73-year-old woman who was diagnosed with papillary thyroid carcinoma, and she underwent surgery and postoperative radioactive iodine. Case 2 was a 74-year-old man who was diagnosed with non-small-cell lung carcinoma, favor squamous cell carcinoma, and he underwent chemoradiotherapy. Case 3 was a 77-year-old man who was diagnosed a thymic carcinoma based on pathological findings and referred the patient to thoracic surgeons for surgical management. The images of the three cases were similar, and the differential diagnoses were difficult and required pathological examination. Primary thyroid carcinoma and invading carcinoma originating from the adjacent organs need to be distinguished because their prognoses and treatment strategies are different. It is important to properly diagnose them by images and pathological findings.

Learning points:

  • The thyroid gland in the anterior neck can be directly invaded by surrounding organ cancers.

  • Primary thyroid carcinoma and invading carcinoma originating from the adjacent organs need to be distinguished because their prognoses and treatment strategies are different.

  • It is important to properly diagnose by images and pathological findings.

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G Leksic Division of Endocrinology and Diabetes, Department of Internal Medicine

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A M Alduk Department of Radiology, University Hospital Centre Zagreb, Zagreb, Croatia

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V Molnar Division of Endocrinology and Diabetes, Department of Internal Medicine

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A Haxhiu Division of Endocrinology and Diabetes, Department of Internal Medicine

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A Balasko Division of Endocrinology and Diabetes, Department of Internal Medicine

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N Knezevic Department of Urology, Department of Internal Medicine, University Hospital Centre Zagreb, School of Medicine, University of Zagreb, Zagreb, Croatia

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T Dusek Division of Endocrinology and Diabetes, Department of Internal Medicine, University Hospital Centre Zagreb, School of Medicine, University of Zagreb, Zagreb, Croatia

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D Kastelan Division of Endocrinology and Diabetes, Department of Internal Medicine, University Hospital Centre Zagreb, School of Medicine, University of Zagreb, Zagreb, Croatia

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Summary

Primary aldosteronism (PA) is characterised by aldosterone hypersecretion and represents a common cause of secondary hypertension. During diagnostic evaluation, it is essential to determine the aetiology of PA since the treatment of unilateral and bilateral disease differs significantly. Adrenal vein sampling (AVS) has been implemented as a gold standard test for the diagnosis of PA subtype. However, due to the AVS complexity, costs and limited availability, many patients with PA are being treated based on the computed tomography (CT) findings. In this article, we present two patients with discrepant CT and AVS results, demonstrating that AVS is the only reliable method for localising the source of aldosterone excess.

Learning points:

  • CT is an unreliable method for distinguishing aldosterone-producing adenoma (APA) from bilateral adrenal hyperplasia (BAH).

  • CT can be misleading in defining lateralisation of the aldosterone excess in case of unilateral disease (APA).

  • AVS is the gold standard test for defining the PA subtype.

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A Chinoy Department of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK
Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK

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N B Wright Department of Paediatric Radiology, Royal Manchester Children's Hospital, Manchester, UK

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M Bone Department of General Paediatrics, Royal Manchester Children’s Hospital, Manchester, UK

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R Padidela Department of Paediatric Endocrinology, Royal Manchester Children’s Hospital, Manchester, UK
Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK

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Summary

Hypokalaemia at presentation of diabetic ketoacidosis is uncommon as insulin deficiency and metabolic acidosis shifts potassium extracellularly. However, hypokalaemia is a recognised complication of the management of diabetic ketoacidosis as insulin administration and correction of metabolic acidosis shifts potassium intracellularly. We describe the case of a 9-year-old girl with newly diagnosed type 1 diabetes mellitus presenting in diabetic ketoacidosis, with severe hypokalaemia at presentation due to severe and prolonged emesis. After commencing management for her diabetic ketoacidosis, her serum sodium and osmolality increased rapidly. However, despite maximal potassium concentrations running through peripheral access, and multiple intravenous potassium ‘corrections’, her hypokalaemia persisted. Seventy two hours after presentation, she became drowsy and confused, with imaging demonstrating central pontine myelinolysis – a rare entity seldom seen in diabetic ketoacidosis management in children despite rapid shifts in serum sodium and osmolality. We review the literature associating central pontine myelinolysis with hypokalaemia and hypothesise as to how the hypokalaemia may have contributed to the development of central pontine myelinolysis. We also recommend an approach to the management of a child in diabetic ketoacidosis with hypokalaemia at presentation.

Learning points:

  • Hypokalaemia is a recognised complication of treatment of paediatric diabetic ketoacidosis that should be aggressively managed to prevent acute complications.

  • Central pontine myelinolysis is rare in children, and usually observed in the presence of rapid correction of hyponatraemia. However, there is observational evidence of an association between hypokalaemia and central pontine myelinolysis, potentially by priming the endothelial cell membrane to injury by lesser fluctuations in osmotic pressure.

  • Consider central pontine myelinolysis as a complication of the management of paediatric diabetic ketoacidosis in the presence of relevant symptoms with profound hypokalaemia and/or fluctuations in serum sodium levels.

  • We have suggested an approach to the management strategies of hypokalaemia in paediatric diabetic ketoacidosis which includes oral potassium supplements if tolerated, minimising the duration and the rate of insulin infusion and increasing the concentration of potassium intravenously (via central line if necessary).

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Jonathan Brown Brighton and Sussex University Hospitals NHS Trust, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK

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Luqman Sardar Elderly Care, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK

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Summary

A 68-year-old previously independent woman presented multiple times to hospital over the course of 3 months with a history of intermittent weakness, vacant episodes, word finding difficulty and reduced cognition. She was initially diagnosed with a TIA, and later with a traumatic subarachnoid haemorrhage following a fall; however, despite resolution of the haemorrhage, symptoms were ongoing and continued to worsen. Confusion screen blood tests showed no cause for the ongoing symptoms. More specialised investigations, such as brain imaging, cerebrospinal fluid analysis, electroencephalogram and serology also gave no clear diagnosis. The patient had a background of hypothyroidism, with plasma thyroid function tests throughout showing normal free thyroxine and a mildly raised thyroid-stimulating hormone (TSH). However plasma anti-thyroid peroxidise (TPO) antibody titres were very high. After discussion with specialists, it was felt she may have a rare and poorly understood condition known as Hashimoto’s encephalopathy (HE). After a trial with steroids, her symptoms dramatically improved and she was able to live independently again, something which would have been impossible at presentation.

Learning points:

  • In cases of subacute onset confusion where most other diagnoses have already been excluded, testing for anti-thyroid antibodies can identify patients potentially suffering from HE.

  • In these patients, and under the guidance of specialists, a trial of steroids can dramatically improve patient’s symptoms.

  • The majority of patients are euthyroid at the time of presentation, and so normal thyroid function tests should not prevent anti-thyroid antibodies being tested for.

  • Due to high titres of anti-thyroid antibodies being found in a small percentage of the healthy population, HE should be treated as a diagnosis of exclusion, particularly as treatment with steroids may potentially worsen the outcome in other causes of confusion, such as infection.

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Valeria de Miguel Departments of Endocrinology, Metabolism and Nuclear Medicine

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Andrea Paissan Departments of Endocrinology, Metabolism and Nuclear Medicine

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Patricio García Marchiñena Departments of Urology, Metabolism and Nuclear Medicine

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Alberto Jurado Departments of Urology, Metabolism and Nuclear Medicine

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Mariana Isola Pathology, Buenos Aires, Argentina

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José Alfie Hypertension Unit of Hospital Italiano de Buenos Aires, Buenos Aires, Argentina

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Patricia Fainstein-Day Departments of Endocrinology, Metabolism and Nuclear Medicine

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Summary

We present the case of a 25-year-old male with a history of neurofibromatosis type 1 and bilateral pheochromocytoma 4 years after kidney transplantation that was successfully treated with simultaneous bilateral posterior retroperitoneoscopic adrenalectomy.

Learning points:

  • Hypertensive patients with NF1 should always be screened for pheochromocytoma.

  • Pheochromocytoma is rarely associated with transplantation, but it must be ruled out in patients with genetic susceptibility.

  • Posterior retroperitoneoscopic adrenalectomy (PRA) allows more direct access to the adrenal glands, especially in patients with previous abdominal surgeries.

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Anne Marie Hannon Departments of Endocrinology and Diabetes, Cork University Hospital, Cork, Ireland

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Isolda Frizelle Departments of Endocrinology and Diabetes, Cork University Hospital, Cork, Ireland

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George Kaar Departments of Neurosurgery, Cork University Hospital, Cork, Ireland

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Steven J Hunter Department of Endocrinology and Diabetes, Royal Victoria Hospital, Belfast, UK

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Mark Sherlock Department of Endocrinology and Diabetes, Beaumont Hospital, Dublin, Ireland

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Christopher J Thompson Department of Endocrinology and Diabetes, Beaumont Hospital, Dublin, Ireland

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Domhnall J O’Halloran Departments of Endocrinology and Diabetes, Cork University Hospital, Cork, Ireland

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the Irish Pituitary Database Group
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Summary

Pregnancy in acromegaly is rare and generally safe, but tumour expansion may occur. Managing tumour expansion during pregnancy is complex, due to the potential complications of surgery and side effects of anti-tumoural medication. A 32-year-old woman was diagnosed with acromegaly at 11-week gestation. She had a large macroadenoma invading the suprasellar cistern. She developed bitemporal hemianopia at 20-week gestation. She declined surgery and was commenced on 100 µg subcutaneous octreotide tds, with normalisation of her visual fields after 2 weeks of therapy. She had a further deterioration in her visual fields at 24-week gestation, which responded to an increase in subcutaneous octreotide to 150 µg tds. Her vision remained stable for the remainder of the pregnancy. She was diagnosed with gestational diabetes at 14/40 and was commenced on basal bolus insulin regimen at 22/40 gestation. She otherwise had no obstetric complications. Foetal growth continued along the 50th centile throughout pregnancy. She underwent an elective caesarean section at 34/40, foetal weight was 3.2 kg at birth with an APGAR score of 9. The neonate was examined by an experienced neonatologist and there were no congenital abnormalities identified. She opted not to breastfeed and she is menstruating regularly post-partum. She was commenced on octreotide LAR 40 mg and referred for surgery. At last follow-up, 2 years post-partum, the infant has been developing normally. In conclusion, our case describes a first presentation of acromegaly in pregnancy and rescue of visual field loss with somatostatin analogue therapy.

Learning points:

  • Tumour expansion may occur in acromegaly during pregnancy.

  • Treatment options for tumour expansion in pregnancy include both medical and surgical options.

  • Somatostatin analogues may be a viable medical alternative to surgery in patients with tumour expansion during pregnancy.

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