Linear milia en plaque on the forearm.

Area of Science:

• Dermatology
• Dermatopathology

Background:

• Milia en plaque is a rare, benign skin condition characterized by multiple milia lesions.
• It typically presents on the face or trunk, but linear variants have been reported.

Observation:

• A 64-year-old male presented with a 2-week history of asymptomatic, grouped, tiny white papules (2-4 mm) on an erythematous plaque.
• The lesions followed a linear pattern along the ulnar border of the right forearm and dorsum of the hand.
• The papules lacked umbilication and contained solid whitish material upon needle expression.

Findings:

• Clinical presentation strongly suggested milia en plaque.
• The linear arrangement and location on the forearm and hand are atypical for common milia en plaque presentations.
• Histopathological examination would be necessary for definitive diagnosis.

Implications:

• This case highlights the importance of considering milia en plaque in the differential diagnosis of linear eruptions, even in unusual locations.
• Further research into the etiology and management of linear milia en plaque may be warranted.
• Accurate diagnosis is crucial to reassure patients and avoid unnecessary treatments for more serious conditions.