Pleural Endosalpingiosis: A Novel Entity.

Endosalpingiosis, defined as ectopic fallopian tube tissue, is a rare entity usually found in the intraabdominal cavity. We present a case of pleural endosalpingiosis presenting as an exudative pleural effusion diagnosed through pleural biopsy and histologic examination. To our knowledge, no case reports in the literature have described this process occurring in the pleural cavity. This report highlights this novel entity and the diagnostic dilemma it poses.