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Follicular Lymphoma (Detailed)

Most common indolent non-Hodgkin lymphoma, generally responsive to therapy but often incurable.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Hematoloji department. Book Appointment →

What is Follicular Lymphoma (Detailed)?

Follicular lymphoma (FL) accounts for 20-25% of all non-Hodgkin lymphomas and is the most common indolent lymphoma in Western countries. Median age at diagnosis is around 60 years, with slight female predominance. The defining genetic feature is t(14;18)(q32;q21), juxtaposing BCL2 to the immunoglobulin heavy chain enhancer and resulting in BCL2 overexpression, which prevents apoptosis of B cells.

Histologic grading (1 to 3A and 3B) reflects the proportion of centroblasts. Grades 1 and 2 are managed as indolent disease; grade 3B behaves more aggressively and is treated like DLBCL. Tumor-microenvironment features (T-regulatory cells, follicular dendritic cells) influence prognosis. The FLIPI and FLIPI-2 prognostic indices stratify risk based on age, stage, hemoglobin, nodal involvement, and LDH/beta-2 microglobulin.

Asymptomatic, low-tumor-burden disease can be managed with active surveillance. Symptomatic or high-tumor-burden disease is treated with bendamustine-rituximab or R-CHOP, often followed by rituximab maintenance. Relapsed disease may receive obinutuzumab-based regimens, lenalidomide-rituximab (R²), PI3K inhibitors (idelalisib, copanlisib), EZH2 inhibitors (tazemetostat), CAR-T therapy (axicabtagene, lisocabtagene), or bispecific antibodies (mosunetuzumab, glofitamab). Watch for transformation to aggressive lymphoma.

Symptoms

Painless lymphadenopathy (waxing and waning)
Splenomegaly or hepatomegaly
Bone marrow involvement causing cytopenias
Constitutional symptoms (B symptoms uncommon at diagnosis)
Compression of adjacent structures
Extranodal manifestations (gastrointestinal, skin)
Asymptomatic detection during evaluation for other reasons
Symptoms of transformation: rapid growth, B symptoms, elevated LDH

Risk Factors

Older age (peak 60 years)
Family history of lymphoma
Pesticide and herbicide exposure
Autoimmune diseases (Sjogren, rheumatoid arthritis)
Hepatitis C virus association in some populations
Immunosuppression
Smoking
Caucasian ethnicity

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Persistent painless lymphadenopathy
  • Splenomegaly or unexplained cytopenia
  • Symptoms of bowel obstruction in extranodal disease
  • Rapid growth or B symptoms suggesting transformation
  • Detection during imaging for unrelated reasons
  • Family history with concerning symptoms

Treatment Methods

01
Watch and wait for asymptomatic, low-tumor-burden disease
02
First-line therapy: bendamustine-rituximab or R-CHOP
03
Rituximab or obinutuzumab maintenance
04
Relapsed disease: obinutuzumab-bendamustine, R² (lenalidomide-rituximab)
05
Targeted agents: PI3K inhibitors (idelalisib, copanlisib), EZH2 inhibitor tazemetostat
06
CAR-T therapy: axicabtagene ciloleucel, lisocabtagene maraleucel
07
Bispecific antibodies: mosunetuzumab, glofitamab
08
Stem cell transplantation in selected relapsed cases

Which Department to Visit?

You can visit our Hematoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.