We have read with great interest the article written by Ko and colleagues on a particularly rare type of malignant mesenchymal tumor that is paratesticular leiomyosarcoma and we did appreciate the argumentation on the utility of adjuvant chemotherapy as treatment of stage III disease. As for our experience, we would like to shed light on a very rare and little-known aspect surrounding this neoplasm, which is the capability of dedifferentiation exerted in order to recur or metastasize
