A 12-year-old boy presents with sudden onset of blistering lesions on his arms and legs, occurring a few days after he developed a typical cold sore on his upper lip. What’s the diagnosis?

A 35-year-old man has two asymptomatic, annular lesions on the dorsum of his left hand, which have slowly expanded over the past three months. What’s the diagnosis?

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? What’s the diagnosis?

A pregnant woman presents with a generalised symmetrical rash of blisters and serous crusts that flared in the third trimester. What’s the diagnosis?

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. What’s the diagnosis?

A man presents with a six-week history of intense generalised pruritus sparing his face that is worse at night. What’s the diagnosis?

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. What’s the diagnosis?

A boy has developed pearly, umbilicated, firm papules on his thighs. What’s the diagnosis?

A man presents with an irritable, pigmented rash confined to his groins and perineal area. What’s the diagnosis?

A woman presents with adherent asbestos-like scale bound around tufts of hair within her scalp. What’s the diagnosis?

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. What’s the diagnosis?

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. What’s the diagnosis?

A woman presents with a two-week history of pruritic blisters, at various stages of evolution, over her limbs. What’s the diagnosis?

A 65-year-old man presents with a recently inflamed, dusky red-brown lesion on his chest that displayed multiple freckles and solar lentigines. What’s the diagnosis?

A 54-year-old man presented with a longstanding, symmetrical, small, red papule on his thigh that had not grown and was asymptomatic. What’s the diagnosis?

A 58-year-old woman presents with atrophic and split fingernails, partially covered by a web of tissue. What’s the diagnosis?

A 53-year-old woman presents with crawling sensations and an excoriation on her forehead. She brings a sample of the ‘parasites’ she says she has extracted from the lesion. What’s the diagnosis?

A 29-year-old man presents with a persistent eroded and indurated plaque on his lower lip which has not responded to topical treatments. What’s the diagnosis?

A 24-year-old man presents with progressive loss of his beard hair in patches. What’s the diagnosis?

A 23-year-old tropical fish fancier presents with a nodular lesion on his finger which has not responded to antibiotics. What’s the diagnosis?

A 45-year-old man presents with multiple nodules discharging a chalky substance on his scrotum. What’s the diagnosis?

A 28-year-old man presents with an asymptomatic reddish-blue translucent nodule on his lip. What’s the diagnosis?

A 36-year-old man presents with recurrent, painful ulcers on his lips and mobile oral mucosa. What’s the diagnosis?

A 39-year-old man presented with a longstanding, widespread, itchy, brown pigmentation with a rippled pattern on his trunk and limbs. What’s the diagnosis?

A 33-year-old man presents with a large area of hair loss and damaged hair on his scalp. What’s the diagnosis?