A subcutaneous mycosis that involves a chronic inflammatory or granulomatous fungal infection of the subcutaneous tissue of the limbs, chest, back or buttocks caused by Basidiobolus ranarum. Lesions appear as subcutaneous nodules which develop into massive, firm, indurated, painless swellings which are freely movable over the underlying muscle, but are attached to the skin which may become hyperpigmented but not ulcerated. [ http://purl.obolibrary.org/obo/ECO_0007637 ]