Related Experiment Videos
Diagnostic difficulties in periodic Cushing's syndrome
A B Walker1, G P Leese, J P Vora
1Department of Medicine, Royal Liverpool University Hospital, UK.
Postgraduate Medical Journal
|July 1, 1997
Summary
Cushing's syndrome diagnosis can be challenging, especially with periodic hormone overproduction. A thymic carcinoid tumor causing ectopic adrenocorticotropin production was successfully removed in a patient with prior chemotherapy.
Area of Science:
- Endocrinology
- Oncology
Background:
- Cushing's syndrome is a complex endocrine disorder often presenting with subtle symptoms.
- Ectopic adrenocorticotropin (ACTH) production can mimic other conditions, complicating diagnosis.
Observation:
- A 22-year-old woman developed symptoms suggestive of Cushing's syndrome three years post-chemotherapy for a presumed teratoma.
- Initial diagnostic workup, including normal urinary free cortisol levels, did not immediately confirm the diagnosis.
Findings:
- A surgically removed thymic carcinoid tumor was identified as the source of ectopic adrenocorticotropin production.
- Periodic hormonogenesis from the ectopic tumor contributed to diagnostic challenges.
Implications:
- This case highlights the importance of considering ectopic ACTH syndrome in Cushing's syndrome differentials, even with initially normal tests.
- Surgical resection of the ectopic ACTH-producing tumor led to successful management of Cushing's syndrome.