[Biopsy of the mucosa of the lower lip for purposes of diagnosing Sjögren's syndrome].

Thirty biopsies of the lower lip mucosa from patients with clinical and subclinical manifestations of Sjögren syndrome were studied. The results indicate characteristic morphological changes in small salivary glands. The dynamics of these changes consists in progressive lymphoid infiltration of the gland tissue and includes 4 stages: I--weak lymphoid infiltration, II--focal lymphoid infiltration, III--focal-extensive lymphoid infiltration, IV--diffuse lymphoid infiltration, that is, lymphomatosis.

[Malignant African lymphoma].

The article sets forth clinico-anatomical characteristics of Burkkit's lymphoma (50 observations). The investigation was carried out in the granted hospital in Kenya, were the authors had worked from 1967 to 1971. A histological feature of the tumour was a peculiar picture of the "starry sky", which was associated with the presence of large histiocytesmacrophages among prolypherating lymphoid cells, a cytological feature being the availability of vacuoles in the nucleus and cytoplasma.