Subcutaneous panniculitis-like T-cell lymphoma

What it is

From: Orphanet

A rare cytotoxic cutaneous alpha-beta T-cell lymphoma characterized by solitary or multiple erythematous subcutaneous nodules and plaques that can be localized to the lower extremities or generalized. It has been recognized as a distinct subset of peripheral T-cell lymphomas originating and presenting primarily in the subcutaneous fat tissue and often associated with hemophagocytic lymphohistiocytosis.

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.

Erythematous papule · Very frequent (99-80%)

A circumscribed, solid elevation of skin with no visible fluid that is reddish (erythematous) in color.

Panniculitis · Very frequent (99-80%)

Inflammation of subcutaneous adipose tissue.

Abnormality of the coagulation cascade · Frequent (79-30%)

An abnormality of the coagulation cascade, which is comprised of the contact activation pathway (also known as the intrinsic pathway) and the tissue factor pathway (also known as the extrinsic pathway) as well as cofactors and regulators.

Chills · Frequent (79-30%)

A sudden sensation of feeling cold.

Erythematous plaque · Frequent (79-30%)

A plaque (a solid, raised, plateau-like (flat-topped) lesion greater than 1 cm in diameter) with a red or reddish color often associated with inflammation or irritation.

Fatigue · Frequent (79-30%)

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

Fever · Frequent (79-30%)

Body temperature elevated above the normal range.

Hemophagocytosis · Frequent (79-30%)

Phagocytosis by macrophages of erythrocytes, leukocytes, platelets, and their precursors in bone marrow and other tissues.

Hepatosplenomegaly · Frequent (79-30%)

Simultaneous enlargement of the liver and spleen.

Skin ulcer · Frequent (79-30%)

A discontinuity of the skin exhibiting complete loss of the epidermis and often portions of the dermis and even subcutaneous fat.

Weight loss · Frequent (79-30%)

Reduction of total body weight.

When it may begin

From: Orphanet

All ages

Inheritance in the source

From: Orphanet

Not applicable

Which doctor should you see?

The suggested department for discussing Subcutaneous panniculitis-like T-cell 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 Subcutaneous panniculitis-like T-cell 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.