Osteoid-Osteoma of Bone

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Abstract
An osteoid-osteoma is a small, oval or roundish, nidus-like benign neoplasm of bone. When well advanced in its evolution, it consists, in varying proportions, of osteoid, trabeculae of newly formed osseous tissue, and a substratum of highly vascularized osteogenic connective tissue. The lesion usually does not exceed a centimeter in its greatest dimension, and in a given affected bone may lie within the spongiosa (perhaps at or near an articular surface), or against the inner surface of the bone cortex, or even actually within the cortex. Though the nidus-like focus is the osteoid-osteoma per se, the total abnormal area in the affected bone may be very large, since there may be a perifocal zone of bone thickening or sclerosis extending for a considerable distance beyond the nidus. The lesion is a distinctive one, and we hold that it represents an entity sui generis in the pathology of bone disease. Clinical Considerations To date, we have in our files the data (including roentgenographs and pathologic mat...

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