Lipedematous alopecia: a clinicopathologic, histologic and ultrastructural study

Area of Science:

• Dermatology
• Pathology
• Genetics

Background:

• Lipedematous alopecia is a rare scalp condition primarily affecting adult Black females.
• It is characterized by a thickened, boggy scalp and variable hair loss.
• The etiology remains unknown, with no clear associated medical conditions.

Observation:

• Scalp thickness is approximately doubled due to subcutaneous fat layer expansion.
• Microscopic examination shows localized edema and degeneration of adipose tissue.
• Follicular diminution and focal bulb atrophy are observed, but without adipose tissue hypertrophy or hyperplasia.

Findings:

• The primary pathological finding is subcutaneous fat expansion leading to scalp thickening.
• Histology indicates localized edema and adipose tissue disruption, not hypertrophy or hyperplasia.
• Absence of aberrant mucin deposition differentiates it from conditions like myxedema.

Implications:

• The histological features resemble those of lipedema of the legs.
• Understanding these features aids in diagnosing lipedematous alopecia.
• Further research into the unknown etiology is warranted for effective treatment strategies.