USMLE Easy Flashcards
Patient presents with itching between the toes, vesicle rupture with a thing fluid release, and peeling skin.
Tinea pedia caused by dermatophytes. Dermatophytes infect only superficial keratinized tissue because they can’t grow at 37 degrees C or in presence of serum.
Which receptor is responsible for measuring the intensity of a steady pressure on the skin surface?
Ruffini ending (Pacinian does vibration)
Melanocytic nevi are composed of nevus cells, which are small cells that are derived from melanocytes. Where do nevus cells form aggregates?
Nevus cells form aggregates either in the dermis, at the dermal-epidermal junction, or in both places.
What is an intradermal nevus?
An intradermal nevus is composed of groups of nevus cell located only in the dermis.
What is a junctional nevus?
A junctional nevus is composed of clusters of nevus cells located at the tips of the rete ridges in the epidermis or at the dermal-epidermal junction.
What is a compound nevus?
A compound nevus contains nevus cells both at the tips of the rete ridges and within the dermis.
A 51-year-old woman presents with pustules and papules with sebaceous hyperplasia around the central parts of her face. She complains of facial flushing after drinking alcohol or hot fluids.
Rosacea
