The records of 149 patients who underwent testicular exploration for suspected malignancy were reviewed retrospectively. Malignancy was confirmed in 102 patients but benign pathology was noted in 47. Patients with benign disease were older, more likely to be Asian, gave a longer history and on examination were less likely to have a testicular mass. Increased levels of tumour markers, and ultrasonographic and operative appearance of the testis were highly predictive; with ultrasonography having a sensitivity of 100 per cent but a specificity of only 36 per cent for malignancy. Preoperative ultrasonography and an awareness of the potentially benign nature of many lesions with the use of frozen-section biopsy, where appropriate, may allow a decrease in the currently high rate of unnecessary orchidectomy without missing testicular malignancy.