Cold agglutinin disease

What it is

From: Orphanet

Cold agglutinin disease is a type of autoimmune hemolytic anemia defined by the presence of cold autoantibodies (autoantibodies which are active at temperatures below 30°C).

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.

Arthralgia · Very frequent (99-80%)

Joint pain.

Autoimmunity · Very frequent (99-80%)

The occurrence of an immune reaction against the organism's own cells or tissues.

Fatigue · Very frequent (99-80%)

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

Hemolytic anemia · Very frequent (99-80%)

A type of anemia caused by premature destruction of red blood cells (hemolysis).

Muscle weakness · Very frequent (99-80%)

Reduced strength of muscles.

Pallor · Very frequent (99-80%)

Abnormally pale skin.

Abnormal urinary color · Occasional (29-5%)

An abnormal color of the urine, that is, the color of the urine appears different from the usual straw-yellow color.

Back pain · Occasional (29-5%)

An unpleasant sensation characterized by physical discomfort (such as pricking, throbbing, or aching) localized to the back.

Diarrhea · Occasional (29-5%)

Abnormally increased frequency (usually defined as three or more) loose or watery bowel movements a day.

Headache · Occasional (29-5%)

Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve.

Hepatomegaly · Occasional (29-5%)

Abnormally increased size of the liver.

Lymphadenopathy · Occasional (29-5%)

Enlargement (swelling) of a lymph node.

Nausea and vomiting · Occasional (29-5%)

Nausea is a commonly encountered symptom that has been defined as an unpleasant painless subjective feeling that one will imminently vomit. Vomiting has been defined as the forceful expulsion of the contents of the stomach, duodenum, or jejunum through the oral cavity. While nausea and vomiting are often thought to exist on a temporal continuum, this is not always the case. There are situations when severe nausea may be present without emesis and less frequently, when emesis may be present without preceding nausea.

Splenomegaly · Occasional (29-5%)

Abnormal increased size of the spleen.

When it may begin

From: Orphanet

Adult

Inheritance in the source

From: Orphanet

Multigenic/multifactorial

Frequency and the population described

From: Orphanet

Annual incidence: 1-9 / 1 000 000; Norway; Value and class. Annual incidence: <1 / 1 000 000; Italy; Value and class.

Which doctor should you see?

The suggested department for discussing Cold agglutinin disease is Haematology, with a haematologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

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.

• Which blood-cell, marrow, bleeding or clotting finding matters most?
• Does the diagnosis need confirmation or a more precise subtype?
• Which symptoms or laboratory changes should trigger earlier review?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Cold agglutinin disease. 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.