Lichen striatus

Question 1

Classic presentation

Answer 1

Self-limiting inflammatory dermatosis following lines of Blashko in a young child (~4yo) and more common in girls

Question 2

Etiology

Answer 2

Unclear but reported after viral infections, vaccination, and trauma

Question 3

TIme course

Answer 3

usually lasts a few weeks to months

Question 4

DDx

Answer 4

inflammatory linear verrucous epidermal nevus
Blashkitis (more eczematous)
Linear forms of lichen planus/lichen nitidus
Lichenoid drug eruptions
lichenoid chronic GVHD
lupus erythematosus
Koebnerized lesions of verruca plana