In a 63-year-old man, on the scalp
What to see at dermoscopy:
-strawberry appearance
-annular-granular pattern
-hyperkeratosis at the low portion of lesion
-incontinentia pigmenti
Dermoscopy in favor of pigmented actinic keratosis
Comment: biopsy was suggested to rule out a squamous cell carcinoma
In a 45-year-old woman, on the scalp
What to see at dermoscopy:
-loss of follicular openings
-follicular pluggings
-incontinentia pigmenti
-erythema
-arborizing vessels
-telangectasia
-peripilar casts
Biopsy was indicated
Histopathology correlation: discoid lupus erythematosus
Comments: the differential diagnosis of this lesion includes lichen planopilaris.
For more information: Ross et al.. Videodermoscopy in the evaluation of hair and scalp disorders. 2006. J Am Acad Dermatol 55: 799-806