[Phalangeal osteoid osteoma (13 cases)].

Thirteen cases of osteoid osteoma of the phalanxes are reported: 10 fingers and 3 toes. Any phalanx may be affected, with no preference for a particular site, in the young adult. Segmentary tumefaction of the soft parts near the lesion is a more consistent sign than pain, which is often quite minimal. Radiographies demonstrate the increase in the size of the phalanx, whose matrix is condensed. All radiographic techniques must be used to determine the exact location of the nidus, that is always very small (1 to 2 mm), and whose total removal is the only guarantee of cure.