[Intra-articular sub-periosteal osteoid osteoma of the triquetrum. Case report]. / Ostéome ostéoïde sous-périosté du triquetrum en situation intra-articulaire. A propos d'un cas.

We report a case of subperiosteal osteoid osteoma of the triquetrum located into the piso-triquetral joint space. Such a variant at this particular location is very rare. The diagnosis was delayed for six years. A bloc resection of the tumour was followed by complete recovery.

[Infection of a total knee prosthesis revealed by an abscess of the posterior leg compartment. A case report]. / Infection d'une prothèse totale de genou révélée par un abcès de la loge postérieure de jambe. A propos d'un cas.

We report a case of infection of a non-cemented total knee prosthesis that led to abscess formation in the posterior compartment of the leg. This case illustrates the deleterious effect of screws used to fix the non-cemented articular surface of the tibia. Infection, like osteolysis due to polyethylene granuloma, can develop along the screw tract and reach the posterior compartment, especially when the screw protrudes through the posterior cortical of the tibia. Diffusion of an intra-articular event into the posterior compartment should be suspected in patients with a total knee prosthesis who experience calf pain.