Tenosynovial giant cell tumor

What it is

From: Orphanet

A rare soft tissue tumor characterized by lesions predominantly originating from the synovial tissue of joints, tendon sheaths, or bursa. They are typically benign tumors that can either be localized or diffused. Localized tumors are usually painless, firm and slow growing, detected mostly in the fingers and hand (can also be present in wrist, foot or ankle), and patients are asymptomatic. Diffuse-type tumors are more aggressive and often involve large joints (knee, hip, ankle and shoulder). Symptoms may include joint pain, tenderness, swelling, limitation of motion and hemorrhagic joint effusions. Some localized tumors may recur, however they are usually non-destructive. Recurrences are more common in diffused tumors and can lead to joint instability, degenerative joint disease and significant functional impairment. Rare cases with malignant transformation, presenting as aggressive sarcomas leading to local destruction and metastasis to lymph nodes (particularly inguinal and pelvic) and lungs are also reported.

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.

Abnormality of the knee · Frequent (79-30%)

An abnormality of the knee joint or surrounding structures.

Arthritis · Frequent (79-30%)

Inflammation of a joint.

Joint hemorrhage · Frequent (79-30%)

Hemorrhage occurring within a joint.

Joint stiffness · Frequent (79-30%)

Joint stiffness is a perceived sensation of tightness in a joint or joints when attempting to move them after a period of inactivity. Joint stiffness typically subsides over time.

Limitation of joint mobility · Frequent (79-30%)

A reduction in the freedom of movement of one or more joints.

Osteolysis · Frequent (79-30%)

Osteolysis refers to the destruction of bone through bone resorption with removal or loss of calcium.

Joint swelling · Frequent (79-30%)

Abnormal temporal bone morphology · Occasional (29-5%)

Abnormality of the temporal bone of the skull, which is situated at the sides and base of the skull roughly underlying the region of the face known as the temple.

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

An anomaly of the joint that connects the foot with the leg.

Abnormality of the auditory canal · Occasional (29-5%)

Any structural abnormality of the external acoustic tube (also known as the auditory canal).

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

An anomaly of the joint that connects the upper and the lower arm.

Abnormality of the hip joint · Occasional (29-5%)

An abnormality of the hip joint.

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

An abnormality of the shoulder, which is defined as the structures surrounding the shoulder joint where the humerus attaches to the scapula.

Other findings in the same source

From: Orphanet

Additional reported features include Abnormality of the tympanic membrane (Occasional (29-5%)); Abnormality of the wrist (Occasional (29-5%)); Conductive hearing impairment (Occasional (29-5%)); Groin pain (Occasional (29-5%)); Lymphedema (Occasional (29-5%)); Multiple lentigines (Occasional (29-5%)); Chondrocalcinosis (Very rare (<4-1%)); Synovial hypertrophy (Very rare (<4-1%)); Localized osteoporosis (Very rare (<4-1%)); Polyarticular arthropathy (Very rare (<4-1%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Adolescent; Adult; Childhood

Inheritance in the source

From: Orphanet

Not applicable

Frequency and the population described

From: Orphanet

Point prevalence: 1-5 / 10 000; Europe; Value and class.

Which doctor should you see?

The suggested department for discussing Tenosynovial giant cell tumor 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: 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 Tenosynovial giant cell tumor. 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.