A condition characterized by hardening of the penis due to the formation of fibrous plaques on the dorsolateral aspect of the penis, usually involving the membrane (tunica albuginea) surrounding the erectile tissue (corpus cavernosum penis). This may eventually cause a painful deformity of the shaft or constriction of the urethra, or both. The disease is Monarch Disease Ontology identifier MONDO_0008231 (Peyronie disease). Also known as: Induratio penis plastica, Peyronie's disease, Peyronie's fibromatosis, penile fibromatosis, penile induration, penis fibromatosis.