[Supernumerary clavicle: a case report]. / Clavicula supernumeraria: reporte de un caso.

We report a case of left sided supernumerary clavicle in a male child, 3 years old with impossibility to the flexion and extension of the neck and lateralization since birth, in the 3D CAT SCAN we could appreciate the presence of bone tissue with italic S shape that was articulated with the jaw and the left sternun clavicle region. Previous evaluation from the rehabilitation service the patient underwent the removal of the lesion. The pathology study confirmed that this piece was osseous tissue with distal joints surfaces and central bone marrow.