Monarch Disease Ontology entry MONDO_0002860 (testis rhabdomyosarcoma) is a malignant mesenchymal tumor with skeletal muscle differentiation affecting the testis. Also known as: rhabdomyosarcoma (disease) of testis, rhabdomyosarcoma of testis, rhabdomyosarcoma of the testis, testicular rhabdomyosarcoma, testis rhabdomyosarcoma (disease).