in divers presents in two basic forms: juxta-articular (subchondral),
shaft, which includes the neck and a portion of the long bone. The
lesions are predominately saponified fat, are usually asymptomatic, and
are seldom of orthopedic significance. The juxta-articular lesions are
of greater clinical significance, causing symptoms that are potentially
disabling. These lesions show areas of dead bone surrounded by a layer
of collagen which forms a fibrous band and new bone. Beyond is an area
of creeping substitution and healing trabeculae (Fig. 4).
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