Involucrum is a layer of new bone growth outside existing bone seen in pyogenic osteomyelitis. It results from the stripping off of the periosteum by the accumulation of pus within the bone, and new bone growing from the periosteum.

It can be seen radiographically (e.g. with x-rays), but is extremely rare in developed countries as osteomyelitis is rarely left untreated.

[edit] See also

• Sequestrum

v • d • e Osteochondropathy (M80-M94, 730-733) Osteopathies Osteitis endocrine bone disease: Osteitis fibrosa cystica (Brown tumor) infectious bone disease: Osteomyelitis (Sequestrum, Involucrum) · Sesamoiditis · Brodie abscess · Periostitis Bone density and structure Density / metabolic bone disease Osteoporosis · Osteopenia · Osteomalacia Continuity of bone Pseudarthrosis · Stress fracture Other Fibrous dysplasia (Monostotic, Polyostotic) · Skeletal fluorosis · bone cyst (Aneurysmal bone cyst) · Hyperostosis (Infantile cortical hyperostosis) · Osteosclerosis (Melorheostosis) Bone resorption Osteolysis · Hajdu-Cheney syndrome · Ainhum Ischemia Avascular necrosis Other Paget's disease of bone · Algoneurodystrophy · Hypertrophic pulmonary osteoarthropathy · Nonossifying fibroma Chondropathies Chondritis Relapsing polychondritis Other Tietze's syndrome Both Osteochondritis Osteochondritis dissecans Juvenile osteochondrosis lower limb: hip (Legg–Calvé–Perthes syndrome) · tibia (Osgood-Schlatter disease, Blount's disease) · foot (Köhler disease, Sever's disease) upper limb: wrist (Kienbock's disease) Bone and cartilage navboxes: anat / physio / dev, noncongen / congen / neoplasia, symptoms+signs / eponymous signs, proc

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