Immunohistological findings in the appendix. (A) CD3-positive tumour cells distributed mainly in the submucosal and muscle layers (×100). Infiltrating atypical large lymphoid cells are positive for (B) CD4 and (C) TIA1 (×200). TIA1-positive lymphoma cells invade the muscle layer. (D) Rod-like substances in the foveolar pit are positive for anti-East Asian type H. pylori CagA antibody (×400).
Matsushita and Takeshita Diagnostic Pathology 2013 8:2 doi:10.1186/1746-1596-8-2