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Case Reports
. 2013 Jun 7;5(2):85-8.
doi: 10.4081/rt.2013.e23. Print 2013 Apr 15.

Primary diffuse large B-cell lymphoma of the ascending colon

Affiliations
Case Reports

Primary diffuse large B-cell lymphoma of the ascending colon

Aram Barbaryan et al. Rare Tumors. .

Abstract

Primary colorectal lymphoma is a rare malignancy accounting for 3% of all gastrointestinal lymphomas and 0.1-0.5% of all colorectal malignancies. Among primary colorectal lymphomas, the most common histological subtype of colorectal lymphoma is diffuse large B-cell lymphoma. We report a case of an 84-year old Caucasian female who was admitted to the hospital because of a 2 days history of altered mental status. In the emergency department the patient was found to have acute kidney injury and hypercalcemia. On physical examination a large lower quadrant abdominal mass was palpated. Computed tomography scan of abdomen confirmed the presence of a mass along the cecum and proximal ascending colon. Colonoscopy showed a large ulcerated mass and biopsy was consistent with diffuse large B-cell lymphoma. The patient underwent colectomy but refused to receive chemotherapy.

Keywords: abdominal mass; diffuse large B-cell lymphoma; gastrointestinal lymphoma; hypercalcemia; lymphoma.

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Figures

Figure 1.
Figure 1.
Large circumferential mass along the cecum and ascending colon measuring 12.7×7.7×12.1 cm in size with oral contrast within the lumen.
Figure 2.
Figure 2.
Colonoscopy-ulcerating ascending colon mass.
Figure 3.
Figure 3.
Surgical specimen from ascending colon showing bowel wall infiltration with tumor tissue.
Figure 4.
Figure 4.
Diffuse sheets of large atypical lymphoid cells with prominent nucleoli.
Figure 5.
Figure 5.
Effacement of normal colonic architecture by a diffuse infiltrate of lymphoid cells.
Figure 6.
Figure 6.
Immunohistochemistry: peroxidase staining shows the tumor cells to be positive for CD20, a pan B cell marker.

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