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[Prostatic carcinoma presenting as neck lymph node metastases: report of two cases].

We report two cases of prostatic carcinoma presenting as neck lymph node metastases. Case 1: A 56-year-old man was admitted to our hospital with the chief complaint of left lower abdominal pain. A lymph node was palpable on the left side of the neck swollen. Rectal examinations revealed prostatic stony-hard mass. Computed tomography showed a swollen neck and paraaortic lymph nodes on the left side. PSA level was 380 ng/ml. Transperineal prostatic biopsy revealed moderately differentiated adenocarcinoma, and neck lymph node biopsy also revealed metastatic adenocarcinoma. We diagnosed him with prostatic carcinoma stage D2 (LYM). He underwent hormonal therapy (TAB) but died 13 months later. Case 2: A 66-year-old man was admitted to our hospital with the chief complaint of a large palpable mass on the left side of the neck. Resection of this mass revealed metastatic adenocarcinoma. Rectal examination revealed no malignant lesions, but the PSA level was high, 1,700 ng/ml. Transperineal prostatic biopsy revealed moderately differentiated adenocarcinoma. Computed tomography revealed paraaortic and pelvic lymph node metastases and bone scintigram revealed abnormal uptake, bone metastases. We diagnosed him with prostatic carcinoma stage D2 (LYM OSS). We performed bilateral testectomy followed by hormonal therapy (TAB). The lymph node metastases disappeared after 4 months of therapy.