Value of frozen section analysis with suspected testicular malignancy

To determine whether frozen section analysis (FSA) assists safe conservative surgery for men presenting with suspected testicular tumors. We performed a retrospective review of intraoperative testicular FSA used at a single university institution during an 11-year period. The exclusion criteria included lesions of paratesticular origin, size greater than 5 cm, and the known presence of elevated tumor markers or metastatic disease. Eighty men underwent FSA, facilitating the diagnosis of germ cell malignancy in 51 (54.3%) of the 94 new cases encountered during this period. Malignancy was reported by FSA in 52 patients (65.0%), but was later revised in 3 to benign Leydig cell tumor after orchiectomy. Also, 2 of 27 specimens reported as benign by FSA were revised to malignant after analysis of paraffin-embedded tissue from the biopsies. Both were seminoma and required delayed orchiectomy. FSA was reported as “suspicious” (intratubular germ cell neoplasia with necrosis) in 1 patient, in whom orchiectomy was performed and malignancy confirmed. In total, orchiectomy was avoided in 25 cases (31.3%). The positive and negative predictive value for FSA in the diagnosis of testicular malignancy was 94.2% and 92.6%, respectively. Of 13 lesions 1 cm or less, 10 (76.9%) were benign. All 26 lesions greater than 3 cm were malignant. A clear correlation between lesion size and the diagnosis of malignancy was demonstrated. FSA is a valuable tool assisting testicular preservation. Lesion size correlated with incidence of malignancy; therefore, FSA may be best used for small testicular lesions suitable for excision biopsy.