Primary intestinal extranodal natural killer/T-cell lymphoma, nasal type: A case report

Figure 1 Endoscopic appearances of the patient. A, B: Gastroscopy showing superficial gastritis; C, D: Colonoscopy and biopsy showing necrosis, inflammatory exudates, and granulomatous tissue (transverse colon).

Figure 2 Computed tomography, digestive tract imaging and positron emission tomography/computed tomography results. A: Local changes at the ascending colon wall; B: Local wall rigidity and mucosal destruction are seen at the proximal jejunum; C, D: Positron emission tomography/computed tomography showing a non-uniform increase in 18-F-fluoro-deoxy-D-glucose metabolism and a space-occupying mass in the small intestine.

Figure 3 Pathological test results and follow-up positron emission tomography/computed tomography results. A, B: 3 cm × 2 cm × 1 cm primary tumor in the jejunum 10 cm from the ligament of Treitz, and the final diagnosis was primary intestinal extranodal natural killer/T-cell lymphoma, nasal type. (B: 40 × 10 HE); C, D: Positron emission tomography/computed tomography at the 6-month follow-up showing no recurrence or metastasis.

Figure 4 Immunophenotypic analysis of the tumor. A: CD3 (diffuse +); B: CD56 (-); C: TIA (+); D: Gr-B (partial+); E: In situ hybridoma with Epstein-Barr virus RNA test (+); F: Ki-67 index of 80%.