Recent advances upper gastrointestinal lymphomas: molecular updates and diagnostic implications

Area of Science:

• Gastroenterology
• Hematology
• Oncology

Background:

• Extranodal non-Hodgkin lymphomas frequently involve the gastrointestinal tract, primarily the stomach, duodenum, and proximal small intestine.
• Diffuse large B-cell lymphoma and extranodal marginal zone lymphoma are the most common types.
• Systemic lymphomas can also manifest in or spread to the GI tract.

Purpose of the Study:

• To provide an update on recent developments in the pathology and molecular pathology of upper gastrointestinal lymphoproliferative diseases.
• To highlight the evolving classification and diagnostic approaches for primary GI T-cell neoplasms and aggressive B-cell tumors.
• To emphasize the integration of molecular genetic markers alongside morphology and immunophenotype.

Main Methods:

• Review of current literature on gastrointestinal lymphomas.
• Analysis of recent advances in molecular pathology and classification of lymphoid neoplasms.
• Consideration of endoscopic and clinical presentations in diagnosis.

Main Results:

• Significant changes in the classification of primary GI T-cell neoplasms.
• Increased importance of molecular genetic markers in diagnosing aggressive B-cell tumors.
• Recognition of diverse presentations of GI lymphoproliferative diseases.

Conclusions:

• Accurate diagnosis of upper GI lymphoproliferative diseases requires a multimodal approach.
• Molecular pathology plays an increasingly vital role in refining diagnoses and classifications.
• Understanding the interplay of morphology, immunophenotype, molecular markers, and clinical presentation is essential.