Fine-needle aspiration of inguinal lymph nodes in gynecologic practice.

Palpable inguinal lymph nodes are a common finding in gynecologic patients. Assessment of such nodes is especially important in the clinical staging of pelvic cancers. To determine the accuracy, safety, and usefulness of fine-needle aspiration in this setting, we retrospectively reviewed pathologic and clinical data from 62 consecutive aspirates of inguinal lymph nodes in 48 gynecologic patients, of whom 42 had cancer. Aspirates from 37 patients yielded diagnostic material. Aspirated tumor cells consistently reflected the primary tumor histology. Tumors included carcinomas of the vulva, vagina, and cervix, and carcinomas and mixed mesodermal cancers of the corpus and ovary. Node excision and clinical observations provided adequate follow-up for 19 positive and 15 negative aspirates, and identified no false positives and two false negatives. The role of fine-needle aspiration varied with the tumor type and stage. It provided the first microscopic diagnosis of cancer in six patients and the first diagnosis of metastasis in six others. Decisions concerning surgery, radiation ports, and chemotherapy frequently depended on the results of fine-needle aspiration. There were no complications from the procedure. Fine-needle aspiration is an accurate, safe, and useful method for assessing clinically suspicious inguinal nodes.