Posted by admin On March - 26 - 2009
In a 19-year-old woman, on the upper back; previous history of melanocytic lesion excision
What to see at dermoscopy:
-recurrent pigment does not extend beyond the white scarred skin
-pigment network and streaks
-erythema and scar-like depigmentation
Dermoscopy in favor of recurrent nevus
Comments:history of an initial biopsy or excision attempt of melanocytic lesion should be always investigated. The dermoscopic features of persistent nevi are also commonly seen in primary melanoma. As a general rule, in recurrent nevi the pigment will not extend beyond the scarred skin and the entire scar will often be surrounded by a light brown color.
Posted by admin On March - 21 - 2009
In a 52-year-old woman, on the cheek
What to see at dermoscopy:
-irregularly pigmented pseudonetwork (annular-granular pattern)
-light to medium brown pigmentation
-strawberry appearance and telangectasia
-white to yellow surface scale
Biopsy was indicated at the pigmented site
Histopathological correlation: actinic keratosis
Posted by admin On March - 19 - 2009
In a 47-year-old man, on the abdominal wall
What to see at dermoscopy:
-spots of regular pigmented network
-homogeneous light brown pigmentation background
-terminal hair
Dermoscopy in favor of nevus Spilus
Comments: flat or raised pigmented lesions scattered throughout the macular area are either junctional or compound nevi (rarely dysplastic). Malignant melanoma can occur but it is rare; follow-up is suggested
Posted by admin On March - 13 - 2009
In a 30-year-old man, on the upper back
What to see at dermoscopy:
-irregular globular pattern
-cobblestone-like arrangement
-target-like structures
-blotches
-milia-like cysts
Dermoscopy signs in favor congenital nevus; regular follow-up was indicated
Posted by admin On March - 3 - 2009
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