Fig. 2From: Lateral lymph node metastasis in a patient with T1 upper rectal cancer treated by lateral lymph node dissection: a case report and brief literature reviewHistological examination showed a moderately differentiated adenocarcinoma that had invaded the submucosal layer; the invasion depth was classified as a head invasion (a). Immunohistochemical staining for CD34 (b) and D2-40 (c) revealed no infiltration of the vessels or lymph ducts. d The resected lateral lymph nodes confirmed a metastasis of moderately differentiated adenocarcinomaBack to article page