化学療法に対しMixed responseを示した甲状腺癌,精巣腫瘍の同時性頸部リンパ節転移の1例

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37歳.精巣腫瘍の治療中,偶然甲状腺癌の合併が判明し摘出術を施行した.化学療法に反応せずに残存した病変に対しては,組織型の違いもさることながら,重複癌の可能性も考慮に入れる必要があると考えられたWe report a case of synchronous presentation of thyroid cancer and testicular seminoma with lymph node metastasis. A 37-year-old man presented with right scrotal swelling and multiple lymph node swelling. We performed right radical orchiectomy, and histological examination revealed a seminoma of the testis. After systemic work-up for staging, we diagnosed the patient with multiple lymph node metastasis of the seminoma, and administered three cycles of bleomycin, etoposide, and cisplatin (BEP) therapy. Although the chemotherapy was very effective for the retroperitoneal and left cervical lymph node metastases, the right cervical tumor did not change. Retroperitoneal lymphadenectomy combined with right cervical lymph node dissection and hemi-thyroidectomy were performed on September 8, 1998. Pathological examination of the thyroid revealed papillary thyroid cancer and its right cervical lymph node metastasis. There was no evidence of viable cancer cells from either of the primary cancers in the retroperitoneal lymph node. Unresponsiveness to chemotherapy for metastatic lesions from testicular cancer might be a useful clue to detect primary tumors of other origins.