Macrodactylia fibrolipomatosis

Area of Science:

• Medical Genetics
• Orthopedic Surgery
• Pediatric Radiology

Background:

• Macrodactylia fibrolipomatosis is a rare congenital condition characterized by enlarged digits.
• It has been previously described under various terms including macrodactyly, megalodactyly, and local gigantism.
• The term macrodactylia fibrolipomatosis is proposed to better describe its distinct features.

Purpose of the Study:

• To consolidate and describe the clinical, pathologic, and roentgenographic features of macrodactylia fibrolipomatosis.
• To differentiate macrodactylia fibrolipomatosis from other forms of macrodactyly.
• To review existing literature and present new cases of this rare condition.

Main Methods:

• Review of 40 cases from medical literature.
• Analysis of five additional patient cases observed by the authors.
• Correlation of clinical presentation with roentgenographic findings.

Main Results:

• Macrodactylia fibrolipomatosis typically presents soon after birth, often affecting multiple adjacent digits.
• Roentgenograms reveal bony enlargement with characteristic deviations and soft tissue enlargement predominantly of fatty density.
• Fibrofatty tumors impinging on nerves are a potential cause.

Conclusions:

• Macrodactylia fibrolipomatosis is a distinct form of macrodactyly characterized by specific clinical and radiographic findings.
• The condition involves abnormal proliferation of fibrofatty tissue within the digits.
• The etiology remains unclear, but nerve impingement by fibrofatty tumors is suspected.