Familial occurrence of testicular neoplasia: case report of testicular embryonal carcinoma in 2 brothers and a first cousin

Flow cytometric and genetic study of familial gonadal tumors

Three cases of familial gonadal tumors are reported. Genetic studies were conducted in 2 cases: a brother and sister with embryonal carcinoma and a benign cystic teratoma, respectively, and a father and son with embryonal carcinoma. DNA flow cytometry of paraffin-embedded tumors and constitutional karyotyping were performed. Further genetic studies are emphasized.

Familial testicular cancer: report of six cases and review of the literature

The cause of testicular cancer, like most other cancers, is unknown. Certain risk factors such as cryptorchidism, carcinoma in situ, and a preceding contralateral testicular germ cell neoplasm are known to predispose a person to the subsequent development of a testicular malignant lesion. Familial testicular cancer has been debated as a potential and possibly independent risk factor. Evidence in favor of such a hypothesis, based on various genetic studies reported during the past few decades, is reviewed. We add to the existing literature our experience with six cases of familial testicular cancer encountered during a 10-year period, consisting of four father-and-son pairs, one pair of nontwin brothers, and a 23-year-old man who had a maternal uncle with a history of testicular cancer.