[Apudomas of the lung from the cytochemical and electron microscopic viewpoint]

12 small cell anaplastic carcinomas and two bronchial carcinoids have been analysed by light and electron microscopy. Using cytological smears from tumor materials (imprints) silver stainings were applied for detection of argyrophilic and argentaffin nature of APUDoma (Fontana-Masson, Grimelius). The results were compared with ultrastructural findings of neurosecretory granules.