Duodenal pseudolymphoma: A case report and review of literature

Figure 1 The abdominal imaging examination. A, B: Abdominal computed tomography (CT) showing a lesion in front of the pancreatic head; C: Positron emission tomography-CT showing a lesion in front of the pancreatic head.

Figure 2 The histological examination. A: Duodenal pseudolymphoma was confirmed by histopathologic examination, HE × 100; B: Lymph nodes showing reactive lymphoid hyperplasia, HE × 100.

Figure 3 The immunohistochemical finding of the lesion. A, B: Immunohistochemical study revealed follicles mainly consisting of L-26 and CD79a positive B cells, × 400; C, D: Interfollicular distributed CD3 and ubiquitin carboxyl-terminal hydrolase L1 positive T cells, × 400; E: Negative staining for terminal deoxynucleotidyl transferase, × 400.