title: Exfoliative cytology of multiple endobronchial granular cell tumor.
abstract: A multicentric endobronchial granular cell tumor (GCT) in a 50-year-old man was diagnosed by the cytologic study of bronchial lavage specimens. The paraffin-embedded sections contained small clusters of medium-sized round tumor cells that had eccentric nuclei without nucleoli and eosinophilic finely granulated cytoplasm, which was positive with the periodic acid-Schiff stain. These cells were distinguishable from the macrophages and bronchial and squamous cells also found in the specimens. The excised tumors histologically mimicked a squamous cell carcinoma. Since 10% of all GCTs occur in the lung, where a multiple presentation can especially mimic a metastatic malignant process, it is important that the possibility of a granular cell tumor be considered in the screening of exfoliative cytologic specimens from the lung.
authors: Institute of Pathology, Nordwest Hospital, Frankfurt, Federal Republic of Germany.
authors: L
authors: L
authors: Füzesi
authors: P W
authors: PW
authors: Höer
authors: W
authors: W
authors: Schmidt
mesh_terms: D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D001999:Bronchoscopy; D003937:Diagnosis, Differential; D006801:Humans; D007124:Immunoenzyme Techniques; D007150:Immunohistochemistry; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D013194:Staining and Labeling / Q000379:methods