Triple jeopardy in the pituitary.
Aggressive pituitary tumors are rare the pathogenesis is not well established. The development of pituitary tumor after apoplexy has also been rarely reported. We describe the sequential development of Cushing's disease, apoplexy and aggressive pituitary tumor in the same patient. A 31-year old male presented with eutopic ACTH dependent Cushing's syndrome which failed initial pituitary surgery. He underwent subsequent bilateral adrenalectomy for control of hypercortisolism. An episode of pituitary apoplexy then occurred which was followed by the development of a null-cell pituitary tumor. This second tumor exhibited an aggressive behavior with invasion into the surrounding structures and systemic spread clinically. This case provides important evidence for the hypotheses of the pathogenesis of aggressive pituitary tumors which could have arisen from surviving adenoma cells following apoplexy or as a de novo development of pituitary carcinoma from cells which were not part of the original adenoma. This is the first report of a transformation of Cushing's disease to an aggressive and invasive null cell tumor after pituitary irradiation, apoplexy and surgery.
Goh
Kian-Peng
KP
Department of Medicine, Alexandra Hospital, 378 Alexandra Road, 159964, Singapore, Singapore.
Lee
Hwei-Yee
HY
Rajasoorya
Raja C
RC
D049913:ACTH-Secreting Pituitary Adenoma / Q000150:complications* / Q000209:etiology / Q000473:pathology / Q000628:therapy; D000236:Adenoma / Q000150:complications* / Q000209:etiology / Q000473:pathology / Q000628:therapy; D000315:Adrenalectomy; D000328:Adult; D002277:Carcinoma / Q000209:etiology* / Q000473:pathology / Q000628:therapy; D017809:Fatal Outcome; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009361:Neoplasm Invasiveness; D016609:Neoplasms, Second Primary; D047748:Pituitary ACTH Hypersecretion / Q000150:complications* / Q000473:pathology / Q000628:therapy; D010899:Pituitary Apoplexy / Q000150:complications* / Q000209:etiology / Q000473:pathology; D010902:Pituitary Gland / Q000473:pathology* / Q000528:radiation effects / Q000601:surgery; D010911:Pituitary Neoplasms / Q000209:etiology* / Q000473:pathology / Q000628:therapy; D018714:Radiotherapy, Adjuvant