All posts by Ahmed

Medical Student
Dermatoses due to Physical Agents

Perniosis of the ear

History

           A 25-year-old male after an exposure to severe bout of cold weather a painful dull red plaque developed on the ear’s rim. Within two days it was complicated by a superficial ulcer of the ear. On examination, the lesion was cold and tender. There was no other perniotic lesions elsewhere.
Pigmentary Disorders

Vitiligo of the lip

History

         Vitiligo may affect the vermilion zone of the lips as in the presented case of 17-year-old male patient who had linear depigmentation involved the entire length of the upper lip of one year duration. Other body areas were not involved. Vitiligo of the lips rarely responds to any therapeutic agent or procedure as the lips are devoid of hair follicles from where repigmentation usually starts.
Genodermatoses

Blueberry muffin baby

Blueberry muffin baby2

History

          A 2-week-old neonate born with generalized dark blue to magenta, nonblanchable, indurated, round to oval, hemispheric purpuric papules and plaques ranging from 1 mm to 1 cm. The lesions favored the face, trunk and limbs. There was no identifiable underlying cause.
         The main etiologic factors include congenital infections (rubella, cytomegalovirus, and parvovirus B19), hemolytic disease of the newborn (Rh incompatibility, blood group incompatibility), hereditary spherocytosis, neuroblastoma, rhabdomyosarcoma, Langerhans cell histiocytosis, and congenital leukemia.
Genodermatoses

Verrucous epidermal nevus

History

         A warty brown-black linear plaque involved the lower part of left ear was noted since birth. With the passage of time the lesion became darker in color and had acquired more triangular shape. There were no associated cutaneous or systemic abnormalities.
Fungal Infections

Tinea imbricata

History

          A 30-year-old man presented with concentric red scaly rings on the abdomen of two months duration. KOH smear was positive for fungal hyphae and spores. Tinea imbricata (Tokelau) is a superficial fungal infection caused by anthropophilic dermatophyte named Trichophyton concentricum.