[Histological and ultrastructural characteristics of morphological variants of neurilemmoma]

On the basis of histological and ultrastructural study of 57 neurilemmomas 4 main morphological types of tumour are distinguished; with a prevalence of the Antoni A type tissue, with a prevalence of the tissue of the transitory zone, prevalence of the Antoni B type tissue and a fibrosing variant of neurilemmoma. A variety of the morphological variants of neurilemmoma is due to different quantitative combination of morphological sings of degeneration and necrosis of tumour cells with the organization of the aseptic necrosis of tumour cells with the organization of the aseptic necrosis by their replacement with a fibrous tissue. The peculiarity of the peripheral nerve blood supply is a premise for the development of tumour cell degeneration.