Prostatic adenocarcinoma metastatic to axillary lymph node diagnosed by fine-needle aspiration biopsy

摘要

Regional or generalized lymphadenopathy is a common clinical presentation of many different diseases, with meta-static carcinomas and lymphomas being among the most common causes in elderly individuals. Prostatic adenocar-cinoma that has metastasized commonly involves regional lymph nodes, bone, and lung. Lymph nodes are in fact the most frequent metastatic site for carcinoma of the prostate, and the lymph nodes most commonly involved are those of the pelvis (obturator and iliac) and retroperitoneum. With more advanced disease there can be involvement of periaortic, intrathoracic, supraclavicular, cervical, and very rarely axillary lymph nodes. Prostatic adenocarcinoma may also present as a metastatic adenocarcinoma of unknown primary origin to nonregional, extraskeletal sites or as a metastasis to a rarely encountered atypical site in a patient with established known prostate carcinoma.