Dercum's disease: painful fatty tissue (adiposis dolorosa) explained

Dercum's disease was first described by the American neurologist Francis Dercum in the late nineteenth century under the name adiposis dolorosa, literally painful fat. A case report in Cureus describes it as a fairly rare and understudied disease typically characterised by painful subcutaneous adipose tissue of varying size and localisation throughout the body. These growths may look like simple lipomas, but unlike ordinary lipomas the fatty tissue bears significant pain and tenderness.

A review describing a case of both type 1 and type 2 disease says it consists of multiple painful lipomas in the subcutaneous tissue with a distribution mainly in the abdomen and extremities, and that the cause is not clear and is thought to be a combination of neurological and endocrine disorder. The definition proposed by Hansson and colleagues, quoted in the case report, is at minimum overweight or obese patients with associated painful adipose tissue.

Pain is the defining feature and can be disproportionate to the size of the lumps. The review says the disease is often accompanied by associated symptoms such as weakness, fatigue and depression, and that the painful adipose tissue can be diffuse and generalised or concentrated in palpable lipomas. The most commonly affected sites in the literature are the extremities, trunk, pelvic area and buttocks. Pain may be constant or episodic; in one reported case episodes lasted from minutes to days, the longest 32 days.

Because there is no widely accepted classification, the Hansson scheme is often cited:

There is no blood test or scan that confirms Dercum's disease. The case report states that no biomarkers have been identified and that biopsies show fatty connective tissue virtually indistinguishable from ordinary lipomas. Diagnosis is based on a full history and examination, with two main features: obesity and chronic pain associated with hyperplastic or hypertrophic adipose tissue, and it is one of exclusion of other subcutaneous soft tissue conditions.

Ultrasound can help characterise the lumps. In the reported case, the lesions were mostly under 2 cm, hyperechoic and without flow on Doppler imaging. A recent review notes that the disease remains underdiagnosed and is often misclassified as lipoedema, fibromyalgia or lipomatosis, so these are the conditions most often considered alongside it. Because it is easy to dismiss, it can help to keep a record of pain, its triggers and new lumps to bring to appointments.

Reviews are clear that there is no standard of care. A review notes that effective long-term treatment is currently lacking, and that the approach involves pain control through oral medications or direct injections or surgical removal. It says surgical procedures such as liposuction and lipectomy have varying outcomes, and that lidocaine injections into lipomas have been shown to provide only short-term relief. Many case reports of corticosteroids and experimental therapies exist, but large studies are lacking.

The case report in Cureus describes management as complex and currently a multidisciplinary approach employing multimodal treatments including pain control, surgical excision and psychotherapy. In the reported case, excision of selected painful masses improved pain at those sites but new masses continued to appear, and the patient was referred to endocrinology and a pain clinic.

In practice this means working with a GP and, where available, a pain service or specialist who knows the condition. Psychological support addresses the effect of living with chronic pain and of not being believed, not the idea that the pain is imagined.

Reports emphasise how patients can be dismissed. The case report notes that because simple lipomas are typically painless, people with Dercum's disease may be falsely labelled as pain-seeking or have symptoms attributed to psychological disorders. Having a name for the condition, even without a cure, can be an important step toward a coherent care plan.

Day to day, pacing, gentle movement and managing sleep and fatigue are commonly advised in chronic pain care generally, though the Dercum-specific evidence for any single approach is limited. Check any new medicine, injection or supplement with a doctor, and seek urgent help in the usual way for red-flag symptoms such as chest pain or sudden weakness, which are not explained by Dercum's disease.

On the NHS, the usual route is GP assessment, ultrasound or imaging as needed, and referral to a specialist such as an endocrinologist, pain specialist, dermatologist or plastic surgeon depending on local services. Because it is rare, awareness varies between clinicians.

Private consultations can give more time and quicker imaging but the evidence for treatment is the same. Be cautious of any provider offering a definitive cure, and note that surgical removal is generally aimed at selected painful deposits rather than the whole condition. We could not find a UK charity or NHS page specific to this condition, so this guide cites international case reports.