Dermatology Flashcards
(10 cards)
An 80 year old woman presents with itchy white spots on the vulva with a similar plaque on the inner thigh. What is the most likely diagnosis?
Lichen sclerosus
A father enters the general practice with his 10-year-old daughter who recently developed a low-grade fever and rash. The father explains that initially there was one single patch limited to the lower abdomen but after 5 days numerous spots erupted over her torso and back. As well as this, the child complains that the rash has become particularly itchy in the last few days.
On examination, the child has multiple 1 to 2cm erythematous oval lesions in the places described. Additionally, there is a larger 4cm circular erythematous plaque in the lower abdomen.
What is the likely diagnosis?
Pityriasis Rosea
What is the cause of pityriasis rosea?
Herpes Hominis Virus 7 (HHV7)
What causes Stevens-Johnson syndrome?
Penicillin
Sulphonamides
Lamotrigine, carbamazepine, phenytoin
NSAIDs
COCP
Allopurinol
A patient presents with a maculopapular rash which is widespread. She also has lesions in her mouth. Target lesions are noted and there are vesicles. When you rub the skin gently blisters and erosions appear. She also complains of joint pain and fevers. What’s the diagnosis?
Steven-Johnson Syndrome
A 64-year-old Turkish male presented to the emergency department with a painful pruritic rash on the palms of his hands and the soles of his feet. He has recently returned from a sun holiday in Greece. It was during this time that he first noticed the rash. He is otherwise well. On examination, he has a vesicular rash on the surface of his palms and the soles of his feet. What is the diagnosis?
Pompholyx eczema
A patient presents with an erythematous tender pruritic rash that features scaly dry skin with fissures and pustules on the hands and feet. What is the diagnosis?
Palmar-plantar psoriasis
A patient presents with a photosensitive rash affecting sun-exposed surfaces (hands, arms, face) and onycholysis. They have painful, blistering skin lesions that develop from minor trauma to fragile affected skin. What is the diagnosis?
Porphyria cutanea tarda
How do you diagnose systemic mastocytosis?
Serum tryptase
Urinary histamine
A 56-year-old woman presents to her general practitioner with abdominal pain that has persisted for two weeks. Her bowels have been looser and more frequent than usual over the same time period however she has not noticed blood in the stools. Despite feeling nauseous, she has not vomited. She also reports episodes of flushing and a widespread rash on her trunk.
On examination, her chest is clear and she is warm and well perfused. She has general tenderness in her abdomen but no guarding and bowel sounds are present. Flushing of the chest is noted and over her trunk, several widespread red/brown papules are present. Rubbing of the rash causes development of a wheal with transient itching. She has no peripheral oedema. A rectal examination reveals soft stools with no blood.
What is the diagnosis?
Systemic mastocytosis
