Cutaneous colocalized invasive poorly differentiated carcinoma and chronic lymphocytic leukemia/small lymphocytic lymphoma of the head and neck region: a case report and review of the literature.
Department of Pathology, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, TX 75390-9073, USA. Yan.Peng@utsouthwestern.edu