Complete colonic duplication presenting as hip fistula in an adult with pelvic malformation: A case report

Figure 4 Microscopy of the specimen with hematoxylin and eosin staining. A: Under 40 × magnification, the layers of the duplicated tubular structure are mucous, muscular mucosae, submucous, muscular, and serosa as shown by black arrows from top to bottom; B: Under 100 × magnification, numerous lymphocytes gather in the mucous layer are presented by the black arrow.