C60-C63: Malignant neoplasms of male genital organs

C62: Malignant neoplasm of testis

Malignant neoplasm of the testis, or testicular cancer, is a group of diseases in which cells in the testicles, the male reproductive glands, become abnormal and multiply uncontrollably, forming a mass or tumor. These cancer cells can interfere with the normal functioning of the testicles and, if not detected early, can spread to other parts of the body. Distinct types within this group may exhibit different growth patterns and responses to treatment. Common symptoms typically include a lump or swelling in the testis, a feeling of heaviness in the scrotum, or a dull ache in the lower abdomen or groin. Factors such as undescended testis, family history, or age (with incidence peaking in men aged 20-40 years) can increase the risk of developing this disease. While this diagnosis can be concerning, advances in detection and treatment have improved the outlook for men with testicular cancer substantially.