Pulmonary carcinoid with glandular features. Report of two cases with positive fine needle aspiration biopsy cytology

Abstract

A detailed description is given of two challenging cases of pulmonary carcinoid with glandular features that were diagnosed cytologically on fine needle aspiration biopsy material. The histologic type in the first case was identified on the aspirated material obtained from the tumor at the time of its radiologic discovery; for the second case, after a prior diagnosis of adenocarcinoma, the correct diagnosis was made upon review of the material; the diagnosis was warranted by the indolent clinical course. The cytologic diagnoses were unequivocally confirmed by the histology of the surgical specimen in the first case and by an ultrastructural investigation of the second.