Presentation of multiple painful subcutaneous nodules: Dercum's disease, a rare variant of lipoma.

A woman in her 50s presented to her general practitioner (GP) with an 8-month history of multiple painful subcutaneous nodules of various sizes in her trunk and limbs. Her previous GP made the clinical diagnosis of lipoma when they presented as non-painful nodules 2 years ago. Initial ultrasound demonstrated multiple lipomata with the largest size in the left upper thighs displaying features of subtle internal vascularity, entirely contained within the subcutaneous layer. MRI scan of thigh lesions showed multiple angiolipomas consistent with the entity of Dercum's disease. Subsequent biopsy histology confirmed the image diagnosis of angiolipoma. She was referred to a musculoskeletal oncological surgeon for evaluation and reassurance regarding optimising medical management of her associated obesity. Her angiolipoma and obesity are well managed by her GP. This case highlights the diagnostic workup of a rare variant of lipoma, Dercum's disease. The differential diagnosis of multiple painful lipomas was reviewed and discussed, consequently leading to the discussion of managing the associated obesity in this case.

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Competing interests: None declared.