Fibrin peritonitis is an inflammatory lesion of the peritoneum, characterized by the formation of adhesions - adhesions between the layers of the peritoneum due to their necrosis. Most of these adhesions are fibrin; during inflammation, the exudate envelops them with its fibrin. Inflammatory processes often occur not in one, but in several more or less isolated areas of the peritoneum. In this case, they speak of fibrin peritonitis of individual foci. Serous exudate does not cover these lesions, and they are covered only by a serous fibrinous film. It is a product of excessive accumulation of exudate caused by inflammation or an aseptic condition. The exudate is not scooped out through the peritoneal inversions (as in the focus of peritonitis, it is not fibrinic) and is not absorbed by the tissues of the body (it lacks fibroblasts and plasma cells) - neither because of its low viscosity, nor because of the low content of proteolytic substances.