<s>[INST] <<SYS>> This is a medical question of type : inheritance <</SYS>> Is Henoch-Schonlein purpura inherited ? [/INST] Can Henoch-Schonlein purpura be inherited? The cause of Henoch-Schonlein purpura is currently unknown.  Some evidence suggests that genetic predisposition may contribute to the development of this disease in some cases.  Only a few families with multiple relatives affected by HSP have been reported in the medical literature.  The association between particular genes and a slight increase in the chance of developing HSP has not been proven. </s>