Primary malignant melanoma of the duodenum without visible melanin pigment: a mimicker of lymphoma or carcinoma

Case Report

Hongxia Li, Qinhe Fan, Zhen Wang, Hai Xu, Xiao Li, Weiming Zhang and Zhihong Zhang^*

Diagnostic Pathology 2012, 7:74 doi:10.1186/1746-1596-7-74

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