Fig. 4
From: Postpneumonectomy-like syndrome due to bronchial carcinoid: a unique case report
Histology of bronchial atypical carcinoid tumor. a. Small rounded uniform cells and highly vascularized stroma are seen. Bronchial epithelium on the left appears intact. (hematoxylin-eosin). b. Strong synaptophysin expression in tumor cells. c. Bright CD56 expression in tumor cells. d. Ki67 immunostaining in tumor cells was approximately 10% (original magnifications × 40 [A through D])