BACKGROUND Helicobacter pylori (H. pylori) infection has been postulated to be a pathogenetic factor in gastric lymphoma. However, the etiological factors for gastric lymphoma could vary in different populations. MATERIALS AND METHODS We looked for histological evidence of H. pylori infection in 53 gastrectomy specimens from Hong Kong Chinese patients with primary gastric B-lymphoma. We also ...

Mucosa-associated lymphoid tissue (MALT) lymphomas usually arise at sites of acquired MALT and are uncommon in native MALT (eg, Peyer patches and tonsil). Malignancy in these low-grade lymphomas is often inferred by immunoglobulin light-chain restriction and expression of CD43; molecular genetic evidence is sought only if these are in doubt. We report 6 cases (4 tonsils, 2 appendixes) of margin...

Helicobacter pylori infection is the most common cause of peptic ulcer disease and is an etiologic factor in the development of gastric malignancies. Eradication of H. pylori heals most uncomplicated peptic ulcers, as well as preventing their relapse. In addition, H. pylori therapy has recently been used as a first line treatment for most low grade MALT lymphomas. Despite its efficacy, a small ...

Up to 40% of non-Hodgkin's lymphomas occur at extranodal sites. Most of these arise in the gastrointestinal tract with the stomach as the commonest location. However gastric lymphoma makes up only 2-8% of all gastric malignancies and so, although the incidence is reported to be rising, these are relatively rare tumours. A conservative estimate would suggest that only 600 gastric lymphomas are d...

CONTEXT Mucosa-associated lymphoid tissue (MALT) lymphomas are most commonly found in the stomach, lungs, orbital soft tissue, salivary glands and thyroid. Involvement of the trachea is extremely rare. CASE REPORT This report describes a rare case of MALT lymphoma of the trachea in a 71-year-old woman who presented with a one-year history of coughing, dyspnea, hoarseness and weight loss. Ther...

Mucosa-associated lymphoid tissue (MALT) lymphoma has been established as a distinct entity among non-Hodgkin's lymphomas, and the most common primary site is the stomach. We describe scintigraphic findings in a patient with MALT lymphoma of the thyroid. A 71-year-old woman with Hashimoto's thyroiditis suffered from rapid cervical swelling, and ultrasonography and CT revealed a thyroid nodule. ...

Patients with mucosa-associated lymphoid tissue (MALT) lymphoma often have multiple sites of disease at initial diagnosis or during the clinical course. The neoplasms at multiple sites are often presumed to be identical, indicating dissemination or relapse. However, evidence to support this presumption is usually not available. We compared IGH VDJ sequences in 4 patients with 2 sequential sites...

Small bowel lymphomas of the extranodal type occur in the young and are characteristically associated with malabsorption syndrome. We present the case of an elderly in whom there was no malabsorption and the duodenal tumor was a gastric type marginal zone B cell lymphoma also known as gastric mucosa-associated lymphoid tissue (MALT) lymphoma. A 73-year-old woman presented to the emergency room ...

A colonic mucosa-associated lymphoid-tissue (MALT) lymphoma is relatively rare compared to lymphomas of the stomach or small intestine. We present a case of a MALT lymphoma in the cecum and rectum found during screening colonoscopy. A 54-year-old female, who had undergone right-breast-conserving surgery with axillary dissection due to an invasive ductal carcinoma and a left-breast excisional bi...

OBJECTIVES To review the pathogenesis of MALT lymphoma, and the associations with antigenic stimulation, presentation, and unique treatment. DATA SOURCES Research and review articles and textbooks. CONCLUSION MALT lymphoma is a heterogeneous but unique pathologic form of extranodal B-cell non-Hodgkin's lymphoma. The gastrointestinal tract is the most common site of disease, but involvement ...