Primary intestinal lymphoma with paraproteinemia

Area of Science:

• Gastroenterology
• Oncology
• Pathology

Background:

• Primary intestinal lymphoma presents with abdominal pain, diarrhea, and weight loss.
• Radiologic and laboratory findings may suggest malabsorption.
• Surgical exploration reveals small intestine dilatation and mesenteric lymphadenopathy.

Purpose of the Study:

• To describe five cases of primary intestinal lymphoma.
• To investigate the relationship between primary intestinal lymphoma and IgA heavy chain disease.

Main Methods:

• Case series analysis of five patients with primary intestinal lymphoma.
• Histopathological examination of intestinal mucosa and mesenteric nodes.
• Immunoelectrophoresis to identify immunoglobulin patterns.

Main Results:

• Histology showed diffuse infiltration of the intestinal mucosa with atypical plasma cells, histiocytes, and giant cells.
• Mesenteric lymph nodes exhibited similar infiltrates.
• Immunoelectrophoresis revealed the characteristic pattern of IgA heavy chain disease.

Conclusions:

• IgA heavy chain disease shares histological features with primary intestinal lymphoma.
• It is proposed that IgA heavy chain disease is a variant of primary intestinal lymphoma.
• This finding challenges the classification of IgA heavy chain disease as a distinct entity.