I n t r o d u c t i o nChoriocarcinoma is a highly malignant uncommon tumor of the testis, and it usually occurs as a component of mixed germ cell tumor (1). The testicular enlargement may be subtle, and the patient may present with multiple metastasis. Early metastases are usually found in most of these patients, and they most commonly occur in the lung, liver and brain. There is often marked elevation of the serum levels of human chorionic gonadotropin (hCG) (2). On gross examination, choriocarcinomas of the testis are often small and the involved testes may appear normal.Metastasis from a testicular mixed germ cell tumor as pure choriocarcinoma is also uncommon (3). We report here on one case of metastatic pure choriocarcinoma with aggressive lymph node metastases and multiple pulmonary metastases, and the patient achieved complete remission after high-dose chemotherapy with autologous stem cell transplantation.
C a s e R e p o r tA 33-year-old previously healthy man was referred to Soonchunhyang University Hospital, Korea in December 2006. He complained of abdominal pain, and numerous pulmonary nodules in both lungs had previously been incidentally detected. The patient had a one-month history of progressive abdominal pain and weight loss of 7 kg. No other signs and symptoms had been noted except for dyspepsia and questionable chest tightness. The patient had an acutely ill-looking appearance, and the physical examination of the other systems was unremarkable. His external genitalia were not examined at the first visit. The laboratory findings showed an elevated level of lactate dehydrogenase (LDH) of 1,156 U/L (reference range: 100� 450 U/L) and an elevated level of β -HCG of 174,156.56 mIU/mL (reference range: 0�5 mIU/mL). The initial tests for the WBC, hemoglobin and alpha-fetoprotein (AFP) were 10,000/μ L (reference: 4,000�10,000/μ L), 13.3 g/dL (reference: 13�17 g/dL) and 0.99 Choriocarcinoma in the testis is very rare, and it represents less than 1% (0.3%) of all the testicular germ cell tumors. It is a particularly aggressive variant of non-seminoma tumor, which is characterized by a high serum β -HCG level and multiple lung metastases. The optimal management for this disease remains undefined. We report here on a case of choriocarcinoma with multiple lung metastases, and the patient has achieved continuous remission for 2 years after combination chemotherapy of BEP (bleomycin, etoposide and cisplatin) and sequential high-dose chemotherapy with autologous peripheral stem cell rescue.