SCAR

By Gary M. White, MD

Bulla

Lichen planus pemphigoides presenting preferentially over preexisting scars: A rare instance of isotopic phenomenon. Indian J Dermatol 2015;60:596-9

ENLARGED

Keloid
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Hypertrophic Scar
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Leukemia Cutis. Has been reported to infiltrate minor scars [JD 18;281;1991].

Sarcoidosis. From JAAD June 2014 Volume 70, Issue 6, Pages e119–e120.

Cutaneous Silica Granuloma

Pigmented

Addison's Disease
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Pigmented Streak. This benign pigmented macule is common in scars that stretch.
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Recurrent Melanoma. This was a recurrent lentigo maligna in the scar after previous excision.
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Recurrent Nevus. The recurrent nevus is the benign return of pigment in a partially removed mole. Of course, biopsy is often in order to confirm the diagnosis and exclude atypia/melanoma.
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Monsel's Tattoo. Courtesy Michael O. Murphy, MD
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Postsurgical

See Wound.

Red, Scaly

Recurrent Basal Cell Carcinoma
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White

Lichen Sclerosus. Rarely, LSA may develop in an old scar, e.g., from surgery, vaccination, or a thermal burn [JAAD 1994;31;671].

Yellow

Necrobiosis Lipoidica. May rarely occur in scars [Dermatology Online Journal 22;6].

Miscellaneous

Marjolin's Ulcer. Rarely, squamous cell carcinoma may develop in an old scar or chronic wound.

Velvety skin in graft site. So called Ectopic Acanthosis Nigricans. Dermatología Argentina

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