Osteomyelitis Phlegmonous

**Osteomyelitis phlegmonosis (OSF)** is a severe form of infectious lesion of bones and joints, characterized by extensive inflammation and swelling of the tissues of the affected part of the skeleton. The pathogenesis of OSF is closely related to changes in the central nervous system, leading to disruption of the nervous trophism of bones. It occupies one of the key positions in a number of severe purulent-inflammatory diseases of humans and accompanies inflammation of the periosteum, periosteal-endochondrial region of the leg, and complicates the course of traumatic bone dislocations and radiation therapy. Despite the variety of manifestations of OSF, they all ultimately lead to multiple foci of ossification - pseudoabscesses and sequestration. ASF is not a separate nosological syndrome and usually develops against the background of open and closed fractures of the bones of the lower extremities with concomitant fractures, in which an open fracture of a long bone remains or there are infected skin fistulas. In most cases, the disease develops 5–15 days after injury.

**ICD-10 code**: M86.9

M86—Severe forms of osteomyelitis without fistulas M86 M89—Systemic lesions of connective tissue M00-M99—Joint diseases (name of disease) M1200—018. Diseases of the musculoskeletal system and connective tissue M00–M99. According to the form of complications of fractures of the lower extremities, O. plexopathy is divided into primary and secondary. Primary arachnopathy is a syndrome of peripheral nerve damage in O.F. without the participation of the main etiological factor of the disease. In secondary O. archanopathy, the leading factor in the genesis of damage to the nervous system is the presence of a purulent focus.

When the bones of the lower limb are involved in the process, the tibia and fibula, nerve roots and canals are primarily affected