Bianchini WA, Altemani AM, Paschoal JR. Undifferentiated head and neck tumors: the contribution of immunohistochemical technique to differential diagnosis. Sao Paulo Med J [Internet]. 2003 Nov. 11 [cited 2025 Mar. 14];121(6):244-7. Available from: https://periodicosapm.emnuvens.com.br/spmj/article/view/2663