Localized abdominal idiopathic lipodystrophy

Area of Science:

• Dermatology
• Pathology

Background:

• Localized loss of subcutaneous fat, termed lipoatrophy, has diverse etiologies including panniculitis, drug injections, and systemic diseases.
• Idiopathic lipoatrophies are poorly understood conditions characterized by focal fat disappearance, commonly affecting thighs, abdomen, or ankles.
• Three subtypes exist: lipoatrophia semicircularis, annular lipoatrophy of the ankles, and centrifugal lipodystrophy.

Observation:

• A 52-year-old female presented with a 3-month history of localized abdominal subcutaneous tissue atrophy.
• The condition showed no signs of inflammation, prior trauma, or medication use.
• The atrophy stabilized over six years with histopathology confirming fat absence down to the fascia.

Findings:

• Despite exclusion of autoimmune diseases and Borrelia burgdorferi infection, the diagnosis was localized idiopathic lipodystrophy.
• This represents the second reported case of abdominal lipodystrophy without preceding inflammation or identifiable cause.
• Histopathology confirmed the absence of subcutaneous fat, with normal tissue structure otherwise.

Implications:

• This case contributes to the limited understanding of abdominal idiopathic lipodystrophy.
• The lack of spontaneous resolution and established treatments underscores the need for further research.
• Further investigation into the pathogenesis and potential therapeutic strategies for idiopathic lipodystrophy is warranted.