殿部に発生した tumoral calcinosis の1例

抄録

Tumoral calcinosis (TC) is a rare condition named by Inclan in 1943 and is characterized by a large calcified mass occurring predominantly in the juxta-articular region of the extremity. This paper presents a 63-year-old man with TC of the gluteal region. Histopathological examination revealed deposits of amorphous calcified material surrounded by dense fibrous material. They were stained black with von Kossa stain. The diagnosis of TC was a source of confusion in the present research. Recently several reports reveal that the clinical and pathological features of the calcification of hemodialysis patients are quite typical of TC, but this is called calcification simulating tumoral calcinosis. We regard TC as a form of idiopathic calcification and should exclude the calcification of hemodialysis patients and small calcifications of the calcinosis cutis.