Isotretinoin-induced myositis

Area of Science:

• Dermatology
• Neurology
• Rheumatology

Background:

• Retinoid medications, particularly isotretinoin, are widely used for acne treatment.
• Retinoid-induced myositis is a rare but documented adverse effect.
• Understanding its clinical presentation and management is crucial for patient safety.

Observation:

• An 18-year-old male patient developed myositis during extended isotretinoin therapy.
• The myositis presented with asymmetrical muscle involvement.
• Clinical and biochemical markers of myositis initially progressed after isotretinoin cessation.

Findings:

• Myositis can manifest after prolonged isotretinoin exposure.
• Asymmetrical presentation does not exclude isotretinoin-induced myositis.
• Delayed improvement and initial worsening post-discontinuation are characteristic.

Implications:

• Clinicians should consider isotretinoin-induced myositis in the differential diagnosis of muscle inflammation, even with atypical features.
• Awareness of potential delayed progression is important for patient monitoring.
• Corticosteroid therapy is an effective treatment for this condition.