ACTH-Cell pituitary adenoma with signet ring cells: A rare case report and review of the literature

Levent Trabzonlu*, Tugce Agirlar Trabzonlu, Yesim Gurbuz, Savas Ceylan

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


Here, we present a case of pituitary adenoma producing adrenocorticotropic hormone (ACTH) in a 19-year-old woman. The patient was admitted to neurosurgery clinic because of a headache and decreased visual acuity. Transsphenoidal resection was performed. Microscopic examination of the tumor revealed signet-ring-like cell areas intermixed with conventional pituitary adenoma cells. Both populations of tumor cells showed immunoreactivity for chromogranin, synaptophysin, and ACTH. To date, there have been 3 reports of pituitary adenoma with signet-ring-like changes. To our knowledge, this is the first case of ACTH-secreting pituitary adenoma with signet-ring-like cell changes. The clinical reflection of signet cells in pituitary adenoma is unclear. Accumulation of the similar cases and investigation of molecular background of them may lighten the importance of this morphologic variance.

Original languageEnglish (US)
Pages (from-to)E13-E16
JournalApplied Immunohistochemistry and Molecular Morphology
Issue number2
StatePublished - Feb 1 2020


  • ACTH
  • immunohistochemistry
  • pituitary adenoma
  • signet ring cells

ASJC Scopus subject areas

  • Medical Laboratory Technology
  • Pathology and Forensic Medicine
  • Histology


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