Penile cancer. Aspiration biopsy cytology for staging.

Abstract

Appropriate management and prognosis of patients with penile carcinoma depends on an accurate knowledge of the regional node status. The usefulness of clinical and radiologic examinations in detecting the nodal spread of the disease is limited by the high rates of false-positive and false-negative results. On the other hand, routine or prophylactic lymphadenectomy is associated with 30% to 50% of the major morbidity and 3% of the mortality rate, so that caution is advisable for its use in patients with disease-free nodes. Even bilateral sentinel lymph node biopsy, as proposed by Cabanas, does not warrant an adequate selection of patients candidates to surgical treatment. The role of aspiration biopsy cytology in the management of penile carcinoma was evaluated in a study of 29 cases from the authors' institutions. Aspiration under fluoroscopic or computed tomographic guidance was performed using a 22-23-gauge Chiba needle. The accuracy of aspiration biopsy cytology in identifying the true stage of the disease was 100%. On histologic control, only one node contained malignant cells that were not detected by aspiration biopsy cytology, but this finding did not alter the stage of the patient. Positive cytology is conclusive of Stage III disease and, in this case, a curative lymphadenectomy may be attempted. Negative aspirations do not warrant the absence of metastatic nodal involvement as can be seen in two patients in this series. In such cases, however, a policy of "wait and watch" may be adopted, with repeated aspiration biopsies or surgical biopsy of the sentinel node area.