[Evidence of junctional complexes between cells of monocytic origin in sarcoid granulomas (author's transl)].

Ultrastructural studies of lung and lymph nodes biopsies from twelve patients with sarcoidosis were performed. They consistently demonstrated junctional complexes between consistently demonstrated junctional complexes between granulomatous cells issued from the mononuclear phagocyte system. These inter-cellular contacts have a desmosome-like appearance but differ in some of their structural aspects. The role of these complexes appearing between cells of monocytic origin remains to be defined.