Suprasellar Ectopic Pituitary Neuroendocrine Tumor Misdiagnosed as Pineal Parenchymal Tumor: A Case Report
- Author:
Seung-Bin WOO
1
;
Chang-Young LEE
;
Chang-Hyun KIM
;
Min-Yong KWON
;
Jae Hyun KIM
;
Sang Pyo KIM
;
Sae Min KWON
Author Information
- Publication Type:CASE REPORT
- From:Brain Tumor Research and Treatment 2025;13(2):53-57
- CountryRepublic of Korea
- Language:English
- Abstract: We report a rare and diagnostically challenging case of a 39-year-old male patient who presented with symptoms of dizziness and headaches, without any focal neurological symptoms. Initial imaging studies suggested a germ cell tumor, and an endoscopic biopsy led to a preliminary diagnosis of a pineal parenchymal tumor of intermediate differentiation. However, histological evaluation following surgical resection revealed the final diagnosis to be an ectopic pituitary neuroendocrine tumor (PitNET), a condition that is exceedingly rare. Ectopic PitNETs are uncommon tumors that develop outside the normal anatomical location of the pituitary gland. Their atypical presentation often leads to misdiagnosis as other intracranial neoplasms. This case highlights the diagnostic challenges posed by ectopic PitNETs and contributes to the limited literature on this rare condition. It underscores the importance of maintaining a broad differential diagnosis in patients presenting with atypical intracranial neoplasms.
