<prompt> In testicular tumoursOnly 10 are malignantMaldescent of testes leads to malignancyExtremely painfulExcoriation of the superficial skin  <response>: Maldescent of testis leads to malignancy 1411-LB 1385-B L 25thTumours of the Testes About 99 of testicular neoplasm are malignant and although they make up only about 1 -2 of malignant tumours MC tumours in young males Maldescent undoubtedly predisposes to malignancy. Tumours of testis Seminoma 40 Teratoma 32 combined 14 interstitial tumours 1.5 lymphoma 71. Malignant teratoma intermediate teratocarcinoma is the most common histologic variants of teratoma. Clinical featuresi First noticing that he has a testicular lump. A sensation of heaviness.ii Only 30 of patients experience pain Normally painlessiii There is a history of trauma to the affected side in over 10iv 10 of patients have lax secondary hydroceleEssentials of Diagnosis 1070-CSDT 11th Painless firm mass within the testicle in a man aged 18-40 Elevated serum levels of the beta subunit ofi Human chorionic gonadotropin P-hCG ii Alpha fetoprotein AFP iii Lactic dehydrogenase LDH or all three Enlarged retroperitoneal nodes on abdominal CT scan Palpable abdominal mass in advanced cases. 