Primary extranodal non-Hodgkin's lymphoma.

Area of Science:

• Oncology
• Hematology
• Clinical Medicine

Background:

• Non-Hodgkin's lymphoma (NHL) can originate outside lymph nodes.
• Extranodal involvement occurs in a significant minority of NHL cases.
• Understanding prognostic factors for extranodal NHL is crucial for treatment planning.

Purpose of the Study:

• To investigate the incidence and characteristics of primary extranodal non-Hodgkin's lymphoma.
• To analyze survival outcomes in patients with extranodal NHL.
• To identify factors associated with long-term survival in this patient cohort.

Main Methods:

• Retrospective analysis of 238 non-Hodgkin's lymphoma patients.
• Identification of patients presenting with disease in a primary extranodal site.
• Survivorship analysis using Kaplan-Meier methods.
• Correlation of clinical and pathological factors with survival.

Main Results:

• 22% of patients (52/238) had primary extranodal disease.
• Gastrointestinal tract was the most common extranodal site (50%).
• Diffuse large cell lymphoma was the most frequent histological subtype (64%).
• Long-term survival was linked to low-grade malignancy (>120 months median survival).
• Localized disease or regional lymph node involvement showed a median survival of 65.5 months.
• Aggressive combination chemotherapy for localized intermediate-grade malignancy improved survival (>110 months median survival).

Conclusions:

• Extranodal non-Hodgkin's lymphoma, particularly in the GI tract, is a significant clinical presentation.
• Prognosis is strongly influenced by disease grade and extent.
• Aggressive chemotherapy regimens can improve survival for localized intermediate-grade extranodal NHL.