[Cytological characteristics of a malignantly degenerating stomach ulcer].

On the material of 154 gastrobiopsies and 42 resected stomachs a pronounced dysplasia was revealed which cytologically was manifested by the hyperbasophilic cells (HBC), nucleolar atypia and hypertrophy of other cells, multinuclear pathological mitoses. Fragmentation of the nucleus and alterations of the nuclear apparatus were detected in the HBC in carcinoma in situ and in incipient carcinoma.