Follicular lymphoma

What it is

From: Orphanet

Follicular lymphoma is a form of non-Hodgkin lymphoma characterized by a proliferation of B cells whose nodular structure of follicular architecture is preserved.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Fever · Very frequent (99-80%)

Body temperature elevated above the normal range.

Lymphadenopathy · Very frequent (99-80%)

Enlargement (swelling) of a lymph node.

Lymphoma · Very frequent (99-80%)

A cancer originating in lymphocytes and presenting as a solid tumor of lymhpoid cells.

Mediastinal lymphadenopathy · Very frequent (99-80%)

Swelling of lymph nodes within the mediastinum, the central compartment of the thoracic cavities that contains the heart and the great vessels, the esophagus, and trachea and other structures including lymph nodes.

Weight loss · Very frequent (99-80%)

Reduction of total body weight.

Fatigue · Frequent (79-30%)

A subjective feeling of tiredness characterized by a lack of energy and motivation.

Night sweats · Frequent (79-30%)

Occurrence of excessive sweating during sleep.

Splenomegaly · Frequent (79-30%)

Abnormal increased size of the spleen.

Abnormality of the peritoneum · Occasional (29-5%)

An abnormality of the peritoneum.

Ascites · Occasional (29-5%)

Accumulation of fluid in the peritoneal cavity (between the layers of the peritoneum that lines the abdomen).

Hypercalcemia · Occasional (29-5%)

The concentration of calcium in the blood circulation is above the upper limit of normal.

Increased circulating lactate dehydrogenase concentration · Occasional (29-5%)

An elevated level of the enzyme lactate dehydrogenase in the blood circulation.

Lymphedema · Occasional (29-5%)

Localized fluid retention and tissue swelling caused by a compromised lymphatic system.

Meningitis · Occasional (29-5%)

Inflammation of the meninges.

Other findings in the same source

From: Orphanet

Additional reported features include Pleural effusion (Occasional (29-5%)); Skin nodule (Occasional (29-5%)); Mediastinal mass (Very rare (<4-1%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Adult

Inheritance in the source

From: Orphanet

Multigenic/multifactorial; Not applicable

Frequency and the population described

From: Orphanet

Point prevalence: 1-5 / 10 000; Europe; Value and class. Annual incidence: 1-9 / 100 000; France; Value and class. Annual incidence: 1-9 / 100 000; Europe; Value and class. Annual incidence: 1-9 / 1 000 000; Bulgaria; Value and class.

Which doctor should you see?

The suggested department for discussing Follicular lymphoma is Oncology, with a oncologist and relevant organ specialist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

Additional services that may be relevant, depending on the findings, include: Clinical Genetics; Relevant organ specialist / Surgical Oncology as indicated.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Has the exact tumour type been confirmed, and is staging relevant?
• What is the goal of each proposed treatment option?
• How will side effects, daily function and supportive care be addressed?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Follicular lymphoma. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.