Anti-pituitary-specific transcription factor-1 hypophysitis developing after thymoma resection: a case report with review of literature.
Hitomi Konishi, Yui Yamashita, Yuma Motomura et al.
✦ AI-curated · Sources linked
Case in brief
A 42-year-old woman developed anti-pituitary-specific transcription factor-1 (PIT-1) hypophysitis with deficiencies in growth hormone, prolactin, and thyrotropin following thymectomy for a WHO type B2 thymoma. Diagnosis was confirmed by serum anti-PIT-1 antibodies and cytotoxic T lymphocytes. Treatment with levothyroxine and recombinant human GH led to normalization of serum FT4 and IGF-1 levels, with no tumor recurrence noted on follow-up imaging.
What made this case unusual
This case is notable as it presents anti-PIT-1 hypophysitis developing after thymectomy, challenging the notion that tumor presence alone drives autoimmunity.
Diagnostic / clinical pearl
Clinicians should consider anti-PIT-1 hypophysitis as a potential autoimmune complication in patients experiencing nonspecific symptoms after thymectomy.
Why it matters
Understanding the multifactorial pathogenesis of post-thymectomy autoimmune disorders is crucial for identifying at-risk patients and developing preventive strategies.