Dermatology Quiz
Lifelong irregular pale patches
A man presents with a lifelong history of asymptomatic irregular pale patches outlined by a pink blush localised to his shoulder and back. These failed to react to dermographism. What is the differential diagnosis?
A blistering eruption in pregnancy
A pregnant woman presents with a generalised symmetrical rash of blisters and serous crusts that flared in the third trimester.
Reticulate pigmentation of axillae
A woman presents with a 10-year history of asymptomatic mottled reticulate pigmentation localised to her axillae and groins. Her mother and sister were similarly affected.
Generalised itching with wrist lesions
A man presents with a six-week history of intense generalised pruritus sparing his face that is worse at night.
Muscle weakness with knuckle erythema
A boy develops facial rash, periungual erythema and pruritic erythematous patches on his knuckles and interphalangeal joints. General malaise and proximal muscle weakness was also present.
Pearly papules on the thighs
A boy has developed pearly, umbilicated, firm papules on his thighs.
Pigmented rash localised to the groins
A man presents with an irritable, pigmented rash confined to his groins and perineal area.
Tufted hairs wrapped in asbestos-like scale
A woman presents with adherent asbestos-like scale bound around tufts of hair within her scalp.
Acral blisters with arthritis
Over two months, a woman developed nonpruritic blisters and fragile skin on the dorsal surfaces of her hands. These developed after commencing naproxen for arthritis.
Tense blisters with IgA deposits
A woman, post cardiac surgery, develops large blisters from urticarial lesions on her palms and soles after receiving vancomycin and ciprofloxacin for a postsurgical wound infection.