Anatomy
What is the most superficial layer of the epidermis?
Stratum corneum
What is the function of Langerhans Cells?
Anagen phase follows which hair growth cycle phase?
Telogen
What would indicate a (+) result on a Tzank smear for HSV?
giant nucleated cells
Epithelial cells are also known as?
keratinocytes
What is the function of the basement membrane?
Welds epidermis to the dermis
What is the function of Merkel Cells?
Mechanoreceptors / sense of touch
Which phase of hair growth is associated with cessation of hair production?
Catagen
A tinea infection will what what type of appearance on microscopic slide?
spaghetti and meatballs
What are the functions of epithelial tissues?
covering, lining, protecting surfaces, absorption, secretion
What layer of the epidermis is ONLY present in "thick" skin?
Stratum Lucidum
In the transitional epithelia, the superficial layer of large, dome-like cells are called?
Umbrella Cells
Which phase of hair is <1% of follicles on the scalp?
Catagen
Which disease process of the elderly can appear like a ringworm infection and KOH prep may be helpful in making the differential diagnosis?
Nummular dermatitis
The cuticle is also known as?
eponychium
In which part of the epidermis, begins the production of lamellar bodies?
Stratum spinosum
In what layer of the epidermis are basal cells, merkel cells, and melanocytes found?
Stratum basale
What is unique about the growth cycle of vellus hairs?
short anagen phase
An ellipsoid biopsy should have what length/width ratio?
3:1 or 4:1
What type of sweat gland increases after puberty?
Apocrine
What are the downward projections of the epidermis?
Rete ridges
In what layer of the epidermis are Langerhans cells found?
Stratum spinosum
What phase of the hair growth cycle is associated with the presence of a club hair?
Telogen
MOHS surgery is performed for which type of lesions?
BCC, recurrent tumors, malignant tumors of the face / ears
What type of adipose tissue has abundant mitochondria?
Brown adipose tissue