Primary low-grade MALT lymphoma of the gallbladder

Pathol Int. 2001 Dec;51(12):965-9. doi: 10.1046/j.1440-1827.2001.01299.x.


We report a case of primary low-grade B-cell lymphoma of the mucosa-associated lymphoid tissue (low-grade MALT lymphoma) in the gallbladder. A 58-year-old woman suspected of gallbladder carcinoma underwent laparoscopic cholecystectomy. Microscopic examination of the gallbladder demonstrated lymphoid cell infiltration forming lymphoid follicles with hyperplastic secondary follicles. The surrounding monocytoid B cells and centrocyte-like cells selectively infiltrated the crypt epithelium forming lympho-epithelial lesions. Plasma cells were also noted beneath the mucosal epithelium. Bile culture revealed the Gram-negative bacilli Enterococcus faecalis and Morganella morganii. Immunoglobulin heavy chain gene rearrangement was confirmed using polymerase chain reaction (PCR) and oligoclonal lymphoid proliferations was detected. Because autoimmune diseases, or chronic inflammatory disorders, seem to correlate with the occurrence of MALT lymphoma, Gram-negative bacterial infection could also be considered as a prodrome of MALT lymphoma of the gallbladder.

Publication types

  • Case Reports

MeSH terms

  • Antigens, Neoplasm / analysis
  • Bile / microbiology
  • Biomarkers, Tumor / analysis
  • Clone Cells
  • DNA, Neoplasm / analysis
  • Enterococcus faecalis / isolation & purification
  • Female
  • Gallbladder Neoplasms / genetics
  • Gallbladder Neoplasms / pathology*
  • Gallbladder Neoplasms / surgery
  • Gene Rearrangement
  • Humans
  • Immunoenzyme Techniques
  • Immunoglobulin Heavy Chains / genetics
  • Lymphoma, B-Cell, Marginal Zone / genetics
  • Lymphoma, B-Cell, Marginal Zone / pathology*
  • Lymphoma, B-Cell, Marginal Zone / surgery
  • Middle Aged
  • Morganella morganii / isolation & purification
  • Polymerase Chain Reaction


  • Antigens, Neoplasm
  • Biomarkers, Tumor
  • DNA, Neoplasm
  • Immunoglobulin Heavy Chains