Welcome to your 🧠 Pituitary Disorders, Growth Abnormalities & Diabetes Insipidus with Acromegaly Clinical Long Case Arena — 40 MCQs
1.
A 43-year-old man has progressive enlargement of his hands, feet and facial structures. Examination shows a prominent jaw, widened spaces between teeth, enlarged lips and broad fingers. Which interpretation best explains these findings?
2.
A 46-year-old man with acromegaly reports progressive exertional breathlessness and reduced exercise tolerance. He has longstanding hypertension, and examination reveals bilateral ankle oedema and basal lung crackles. Which complication should be prioritized in further evaluation?
3.
A 16-year-old boy is investigated for accelerated linear growth. His serum IGF-1 is significantly elevated for age, and pituitary MRI identifies a GH-secreting adenoma. His parents ask why early treatment is important when he has no current cardiac or metabolic symptoms. Which is the most appropriate explanation of the benefit of early hormonal control?
4.
A 43-year-old man with a known pituitary macroadenoma suddenly develops an extremely severe headache, repeated vomiting, double vision and rapidly deteriorating visual acuity. He becomes increasingly drowsy. Which diagnosis must be considered immediately?
5.
A 50-year-old man underwent treatment for acromegaly six months ago. His headaches have improved, but he still has enlarged hands and persistent joint discomfort. The clinician wishes to assess ongoing disease activity. Which approach is most appropriate?
6.
A 14-year-old girl is evaluated for tall stature. Her height is above the 97th percentile, but her growth velocity has accelerated markedly over the previous year. She has developed increasing shoe size, excessive sweating and facial coarsening. Her parents are of average height. Which feature most strongly favours pathological growth rather than uncomplicated familial tall stature?
7.
A 45-year-old man with progressive hand enlargement and changing facial features complains of numbness and tingling affecting his thumb, index finger and middle finger, particularly at night. His palms are thickened, and there is no history of trauma. Which mechanism best explains these symptoms?
8.
A 43-year-old man with acromegaly is awaiting definitive pituitary treatment. He has hypertension, HbA1c of 7.2%, obesity and symptoms suggesting sleep apnoea. Which management strategy best addresses his overall clinical needs?
9.
A 46-year-old man with newly diagnosed acromegaly has hypertension, elevated fasting glucose and enlargement of the hands and jaw. His physician explains that the hormonal disturbance affects several organ systems simultaneously. The patient asks why treating the pituitary disease is necessary when medications are already controlling his blood pressure and glucose. Which is the best explanation?
10.
A 13-year-old boy is referred to the endocrine clinic because of excessive height. His height is above the 99th percentile, but his growth chart shows that he has remained on approximately the same percentile for the previous five years. Both parents are tall, his pubertal development is appropriate for age, and examination reveals normal body proportions without acral enlargement. His parents request immediate pituitary imaging because they are worried about gigantism. Which is the most appropriate next clinical decision?
11.
A 43-year-old man has a typical clinical phenotype of acromegaly and elevated age-adjusted IGF-1. A random growth hormone concentration obtained earlier was within the laboratory reference interval. Which explanation best accounts for this discrepancy?
12.
A 48-year-old woman with a history of acromegaly is receiving pegvisomant after incomplete biochemical control with previous treatment. Her serum IGF-1 has normalized, and her soft-tissue symptoms have improved. During follow-up, the physician continues to arrange periodic pituitary imaging despite satisfactory biochemical results. Which explanation best justifies this approach?
13.
A 45-year-old man is referred with progressive enlargement of the hands, thickened facial features and headaches. Clinical assessment supports acromegaly, and biochemical testing confirms GH excess. MRI demonstrates a small pituitary adenoma. He asks how removal of a relatively small intracranial lesion can improve changes occurring throughout his body. Which explanation best connects the underlying disease with the expected therapeutic effect?
14.
A 52-year-old man presents with an enlarged skull and progressively increasing hat size. The clinician considers Paget disease and acromegaly. Which additional clinical finding would more strongly favor acromegaly?
15.
A 49-year-old man with suspected acromegaly has progressive facial coarsening, headaches and hypertension. Bedside confrontation visual field examination is normal. His clinician is considering further pituitary assessment. What is the most appropriate interpretation of the normal bedside visual field finding?
16.
A 46-year-old man with treated acromegaly returns for follow-up. His IGF-1 has normalized, and the headaches and sweating have improved. However, he has hypertension, previously diagnosed impaired glucose tolerance and persistent symptoms of sleep apnoea. He asks whether endocrine follow-up alone is sufficient now that his hormone levels are controlled. Which is the most appropriate long-term care plan?
17.
A 53-year-old woman with acromegaly is found to have elevated blood pressure, impaired glucose regulation and excessive daytime sleepiness. She has a history of progressive snoring and witnessed pauses in breathing during sleep. Her physician arranges sleep assessment while managing the endocrine disorder. Which relationship best explains why this additional assessment is clinically important?
18.
A 56-year-old man with a known GH-secreting pituitary macroadenoma is admitted with sudden severe headache, rapidly worsening vision and vomiting. Examination reveals reduced visual acuity and acute neurological deterioration. His previous clinic records describe gradually progressive symptoms, but the current presentation has developed over several hours. Which is the most appropriate immediate management principle?
19.
A 15-year-old boy presents with rapidly increasing height, enlarged hands and progressive facial coarsening. His growth velocity has increased significantly during the previous two years. Serum IGF-1 is elevated for his age, and further investigations suggest autonomous GH secretion. The physician explains that the abnormal height increase occurs because excessive GH acts through IGF-1 on growing skeletal structures. Which tissue response most directly accounts for his accelerated linear growth?
20.
A 47-year-old woman undergoes evaluation for progressive facial enlargement, joint pain and excessive sweating. Her serum IGF-1 is above the age-adjusted reference range, and growth hormone fails to suppress appropriately during an oral glucose test. MRI reveals a 13 mm pituitary lesion. She also complains of reduced peripheral vision. Which interpretation best integrates the biochemical, radiological and clinical findings?
21.
A 43-year-old man with clinical and biochemical evidence of acromegaly undergoes contrast-enhanced pituitary MRI. It demonstrates a 12-mm pituitary lesion without optic chiasm compression. Which is the most appropriate interpretation of this finding?
22.
A 48-year-old woman with persistent acromegaly after pituitary surgery is started on octreotide. At her next follow-up, she reports intermittent abdominal discomfort and new episodes of pain in the right upper abdomen after fatty meals. The physician considers a treatment-related complication. Which adverse effect is most relevant to her medication?
23.
A 45-year-old man has confirmed acromegaly due to a resectable growth-hormone-secreting pituitary adenoma. He is clinically stable, has no visual field loss and has been assessed by an endocrine and pituitary surgical team. Which is the most appropriate definitive initial treatment?
24.
A 49-year-old man has persistent acromegaly despite previous treatment. The multidisciplinary team considers radiotherapy because further surgery is unsuitable and medical treatment has not achieved adequate control. The patient asks whether radiotherapy will produce immediate normalization of his GH levels. Which explanation best reflects the expected treatment response and long-term risk?
25.
A 48-year-old man undergoes transsphenoidal surgery for a growth-hormone-secreting pituitary macroadenoma. At subsequent endocrine review, IGF-1 remains elevated and further assessment indicates persistent disease activity. Which management approach is most appropriate?
26.
A patient with acromegaly has confirmed growth hormone excess and a pituitary macroadenoma. His HbA1c is 7.2%, and blood pressure is persistently elevated. Which interpretation best describes the importance of these additional findings?
27.
A 42-year-old man with suspected acromegaly has increased hand size and progressive mandibular enlargement. His serum IGF-1 is elevated. A junior doctor suggests using repeated random GH measurements as the principal diagnostic method. The endocrinologist instead recommends appropriate confirmatory dynamic testing. Which feature of GH physiology explains the advantage of this approach?
28.
A 44-year-old man undergoing evaluation for progressive acral enlargement reports loud snoring, witnessed pauses in breathing and excessive daytime sleepiness. He has enlarged facial soft tissues and a BMI of 32 kg/m². Which associated complication is most strongly suggested by these symptoms?
29.
A 14-year-old boy presents with unusually rapid height gain, increased shoe size and progressive enlargement of facial features. His serum IGF-1 is elevated, but the physician notices that the laboratory report has flagged the value using an adult reference interval. The child is undergoing puberty. Which interpretation principle is most important before diagnosing pathological GH excess?
30.
A 44-year-old man has undergone transsphenoidal removal of a GH-secreting pituitary adenoma. At follow-up, his sweating has improved, but his IGF-1 remains persistently above the age-adjusted reference range. Repeat assessment suggests residual hormonally active disease. He is commenced on lanreotide. Which finding would provide the strongest biochemical evidence that this treatment is controlling the underlying hormonal abnormality?
31.
A 43-year-old man has progressive enlargement of his hands and feet, coarse facial features, excessive sweating and headaches. His blood pressure is 154/94 mmHg. Which diagnosis best explains the combination of progressive physical changes and systemic manifestations?
32.
A 51-year-old man with long-standing acromegaly presents for routine follow-up after successful biochemical treatment. He reports intermittent hand numbness and tingling, particularly at night. Examination suggests median nerve compression at the wrist. Which mechanism best connects acromegaly with these neurological symptoms?
33.
A 47-year-old man has progressive enlargement of facial and acral structures. Serum IGF-1 is elevated above the age-adjusted reference range. An oral glucose growth hormone suppression test is performed because biochemical confirmation is required. Which result would support autonomous growth hormone secretion?
34.
A 50-year-old man with confirmed acromegaly undergoes MRI, which demonstrates a large GH-secreting pituitary adenoma extending beyond the sella turcica. He reports worsening headaches, and examination reveals a temporal visual-field defect. The multidisciplinary team recommends tumour-directed treatment rather than focusing only on lowering circulating IGF-1. What is the most important additional treatment objective in this patient?
35.
A 43-year-old man reports progressive enlargement of his hands and feet over four years. His wife has noticed changes in his facial appearance, and he has recently developed hypertension. He previously attributed the changes to weight gain. Which additional historical finding would most strongly support a progressive growth hormone excess disorder rather than simple obesity?
36.
A 55-year-old man with untreated acromegaly has progressive joint pain and difficulty walking. Radiographs demonstrate degenerative changes in several weight-bearing joints. Endocrine treatment successfully normalizes his IGF-1 concentration, but the patient continues to experience substantial joint stiffness. Which explanation best accounts for persistence of his musculoskeletal symptoms?
37.
A 43-year-old man presents with progressive prognathism, interdental spacing, broad hands and feet, excessive sweating and hypertension. The clinical findings strongly suggest acromegaly. Which investigation is the most appropriate initial biochemical assessment?
38.
A 52-year-old woman with confirmed acromegaly has undergone surgical removal of a pituitary adenoma. Repeat biochemical assessment demonstrates persistent hormonal activity, and MRI suggests a small residual lesion. The endocrinologist considers medical therapy to suppress GH secretion and potentially reduce tumour size. Which therapeutic class would most directly achieve both objectives?
39.
A 43-year-old man has undergone successful treatment for acromegaly. His IGF-1 has normalized, and his headaches and sweating have improved. However, he is concerned that his jaw enlargement and joint stiffness have not completely resolved. Which counselling statement is most appropriate?
40.
A 46-year-old man with progressive facial coarsening, excessive sweating and increasing shoe size presents for evaluation. He also complains of persistent headaches. Which additional symptom would be most important to investigate because it may indicate local compression by an underlying pituitary lesion?
