Thymoma-hypogammaglobulinemia syndrome

What it is

From: Orphanet

Good syndrome, also known as thymoma-immunodeficiency, is a very rare acquired immunodeficiency syndrome characterized by the association of thymoma and combined B-cell and T-cell immunodeficiency of adult onset with increased susceptibility to infections.

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.

Decreased circulating antibody level · Very frequent (99-80%)

An abnormally decreased level of immunoglobulin in blood.

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.

Thymoma · Very frequent (99-80%)

A tumor originating from the epithelial cells of the thymus.

Abnormal leukocyte morphology · Frequent (79-30%)

An abnormality of leukocytes.

Bronchiectasis · Frequent (79-30%)

Persistent abnormal dilatation of the bronchi owing to localized and irreversible destruction and widening of the large airways.

Cough · Frequent (79-30%)

A sudden, audible expulsion of air from the lungs through a partially closed glottis, preceded by inhalation.

Dysphagia · Frequent (79-30%)

Difficulty in swallowing.

Dysphonia · Frequent (79-30%)

Difficulty in speaking due to a physical disorder of the mouth, tongue, throat, or vocal cords. Associated with a known physical or neurological cause.

Dyspnea · Frequent (79-30%)

Difficult or labored breathing. Dyspnea is a subjective feeling only the patient can rate, e.g., on a Borg scale.

Fatigable weakness · Frequent (79-30%)

A type of weakness that occurs after a muscle group is used and lessens if the muscle group has some rest. That is, there is diminution of strength with repetitive muscle actions.

Ptosis · Frequent (79-30%)

The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).

Recurrent skin infections · Frequent (79-30%)

Infections of the skin that happen multiple times.

Recurrent urinary tract infections · Frequent (79-30%)

Repeated infections of the urinary tract.

Sinusitis · Frequent (79-30%)

Inflammation of the paranasal sinuses owing to a viral, bacterial, or fungal infection, allergy, or an autoimmune reaction.

Other findings in the same source

From: Orphanet

Additional reported features include Anemia (Occasional (29-5%)); Aplasia/Hypoplasia of the thymus (Occasional (29-5%)); Diabetes mellitus (Occasional (29-5%)); Diarrhea (Occasional (29-5%)); Recurrent respiratory infections (Occasional (29-5%)); Thrombocytopenia (Occasional (29-5%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Adult

Frequency and the population described

From: Orphanet

Point prevalence: 1-9 / 100 000; Worldwide; Value and class. Reported case(s): 241.0; Worldwide. This is a published case count, not prevalence.

Which doctor should you see?

The suggested department for discussing Thymoma-hypogammaglobulinemia syndrome is Allergy and Immunology, with a allergist / clinical immunologist 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.

• Does the history suggest an allergy, an immune problem or another explanation?
• How would any proposed allergy or immune test change care?
• Is an individual emergency plan needed, and who should understand it?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Thymoma-hypogammaglobulinemia syndrome. 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.