[Localized acquired cutis laxa associated with trachyonychia]

Area of Science:

• Dermatology and Genetic Medicine
• Connective Tissue Disorders

Background:

• Acquired cutis laxa (ACL) is a rare connective tissue disorder characterized by elastin metabolism abnormalities.
• It presents clinically with redundant, sagging skin and histologically with a loss of elastic fibers in the dermis.
• The exact etiology of ACL remains largely unknown.

Observation:

• This report details a unique case of localized acquired cutis laxa.
• The patient also exhibited trachyonychia, a condition affecting the nails.
• The association between these two conditions is rarely documented.

Findings:

• Histopathological examination revealed a significant reduction in dermal elastic fibers, consistent with cutis laxa.
• The localized nature of the skin laxity was a key clinical observation.
• The co-occurrence with trachyonychia suggests a potential shared pathway or trigger.

Implications:

• This case expands the clinical spectrum of acquired cutis laxa.
• Understanding the association with trachyonychia may provide clues to the underlying pathophysiology of elastin degradation.
• Further research into elastin metabolism in localized ACL is warranted.