A Case of Gastrointestinal Bleeding due to Duodenal Metastasis from a Testicular Choriocarcinoma

Testicular cancers are the most common malignant neoplasm in men aged 15–35, but only constitute 1 % of cancers in males overall with an incidence of 2.1 cases per 100,000 males and four times greater incidence in white males than in black males [1–3]. Testicular tumors usually present as a nodule or painless swelling of one testicle, which may be noted incidentally by the patient or by his sexual partner [4]. Typically, the patient's chief complaint includes acute testicular pain or heaviness in the lower abdomen. Signs or symptoms of metastatic disease are the initial implication of testicular cancer in approximately 10 % of patients. The most common sites of extragonadal disease are the retroperitoneum, lungs, and liver [5–8]. Only rarely (5 % of cases) are metastases found in the gastrointestinal tract [9]. We report a case of testicular mixed germ cell tumor with metastasis of pure choriocarcinoma involving the small intestine.