History
A 6-year-old girl presented with a dotted brownish hyperpigmented patch confined to one side of the nose seen first at age of two years.
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Stevens Johnson syndrome
History
An 38-year-old lady presented in a bad general state, dehydrated, febrile and severe bullous reaction of three days duration after one intramuscular injection of an antibiotic (Cefotaxime?). She had severe mucous membrane involvement with swelling and denudation (mouth, conjunctivae and vagina) in addition to severe blistering of the skin with many target lesions.
Livedo reticularis
History
A 24-year-old lady presented for the first time with cyanosis of the skin in a net-like or marbled appearance localized to the dorsal surface of both feet. She had no underlying hematological, connective tissue or other systemic disease.
Chilblains
History
A 20-year-old female presented one day after exposure to extreme cold weather with painful purplish plaques on the toes of both feet. On examination the forefeet were cold and tender. Pentoxyfylline 400 mg twice daily for 10 days gave marked improvement.
Necrobiosis lipoidica diabeticorum
History
A 45-y-o man with type II diabetes mellitus since 5 years presented with an irregular, large, shiny and waxy atrophic plaque with yellowish-brown hue and surface telangiectasia on the shin of more than three years duration. Many atrophic small rounded scars are seen in the middle part of the plaque due to previous ulcerations.
Secondary syphilis
History
A 40-y-o woman presented with asymptomatic bilateral symmetrical papulosquamous lesions on the palms and whitish mucous patches involved the tongue, cheeks’ inner sides and the lips of three weeks duration. She denied any illegal sexual activity, however STS (VDRL & TPHA) were positive.
Keratoacanthoma
History
A 72-year-old woman presented with an asymptomatic dome-shaped red nodule with central crater filled with keratin. Surface telangectases were apparent on the surface of the tumor which has been present for about three months. The lesion has been surgically excised in toto for therapeutic and diagnostic purposes and revealed histologic changes consistent with the diagnosis of keratoacanthoma.
Impetigo contagiosum
History
A 2-year-old infant presented with multiple dirty-yellow crusted patches involved the perioral area especially the chin and the v-region of the chest of 4-5 days duration. The lesions had been cured on oral cephalexin and topical fusidic acid for one week.