[Subperiosteal (juxtacortical) chondroma of the hand. Apropos of 4 cases].

The subperiosteal type of chondroma of hand is reputedly rare. Four such cases are reported two in adolescents, one in a child and one in an adult. The chondroma being localized to the phalanges, its most frequent development site. In one patient multiple chondromata were present. The relevant literature and typical characters of these subperiosteal chondromata are reviewed. Radiological images show clearly outlined tumors due to peripheral calcification. Treatment is surgical by block excision through healthy bone, this avoiding recurrence.