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Updated: May 17, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
Published on: January 17, 2018
Benign lymphoepithelial tumor of the pituitary
Hwa Jin Cho1, Jae Kyung Myung, Yong Hwy Kim
1Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea.
Abstract:
Here, we report a case of lymphoepithelial tumor that developed in the sellar and suprasellar regions in a 56-year-old woman. The lesion was composed of abundant but benign squamous cell nests (Erdheim's nests) and heavy lymphoid tissue with well-developed lymphoid follicles. Therefore, it mimicked tonsil or adenoid tissue, but was disorganized. We report this case to define the pathogenesis and proper diagnostic terminology of this unusual sellar and suprasellar lesion, and we assume that its origin is the infundibulum.
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