Multiple myelomatosis with proptosis.

MULTIPLE myelomata are uncommon endosteal tumours developing from the myeloblastic elements of the bone marrow. The ribs, sternum, clavicle, vertebral bodies, and pelvis are favourite sites; the skull is also frequently involved and the long bones may be affected, but never alone (Perkins, 1936). The disease has an insidious onset and is often only recognized late when multiple nodules appear or a spontaneous fracture of one of the long bones takes place. The orbital wall is sometimes an early site, the patient seeks medical advice for the ensuing proptosis.