Cutaneous findings in myotonic dystrophy.

Area of Science:

• Genetics
• Dermatology
• Molecular Biology

Background:

• Myotonic dystrophy (DM) types 1 and 2 are genetic disorders caused by nucleotide repeat expansions in the DMPK gene.
• DM affects multiple organs, with common skin manifestations including early male frontal alopecia and adult-onset pilomatricomas.
• DM increases the risk of skin cancers like basal cell carcinoma and melanoma.

Purpose of the Study:

• To review the cutaneous manifestations of myotonic dystrophy types 1 and 2.
• To summarize potential pathogenic mechanisms underlying these skin conditions.
• To inform dermatologists about DM-related skin findings for improved patient care.

Main Methods:

• Systematic PubMed search using keywords: "myotonic dystrophy," "cutaneous" OR "skin" OR "dermatologic," and "manifestation" OR "finding."
• Manual review of retrieved publications for relevance and identification of additional sources.
• Subsequent literature searches focusing on molecular pathogenesis.

Main Results:

• Common skin findings in DM include early-onset male frontal alopecia and pilomatricomas.
• Increased risk of basal cell carcinoma and melanoma is associated with myotonic dystrophy.
• The review synthesizes current knowledge on DM's dermatologic impact.

Conclusions:

• Dermatologists need awareness of DM's diverse cutaneous manifestations for timely diagnosis.
• Understanding pathogenic mechanisms can guide future therapeutic strategies.
• This review provides a comprehensive overview for clinical practice and research.