Tumorous calcinosis has been considered as a disease of its own. A sur
vey of the literature shows that only its clinical and radiological ap
pearances are universally agreed upon, while its epidemiology and etio
logy are still under discussion. A genetic disorder, recurrent soft-ti
ssue microtrauma and terminal renal failure have been put forward as c
auses. All of them may lead to a localized or generalized disturbance
of the calcium-phosphate metabolism, which in turn could produce tumor
ous calcinosis. Therefore, tumorous calcinosis should be regarded as a
rare manifestation of a metabolic disorder rather than a disease of o
wn.