KLK3 and prostatic acinar adenocarcinoma: At the same time, tumor cells in the glandular ductal differentiation region showed P504S, PSA positive, and CKH, P63 negative (Fig. 3).These pathological results suggest the diagnosis of prostatic synovial sarcoma (biphasic type) combined with prostatic acinar adenocarcinoma, but still cannot provide sufficient diagnostic evidence.