Learning Curve Flashcards
An organ must absorb and excrete
True
Moles were describe before the Renaissance period
True
Laennec described the first melanoma
True
Vit D is manufactured from what product by uv light
7-dehydrocholesterol
Define parakeratosis
Incomplete maturation of keratinocytes where nuclei are retained in the stratum corneum
What is the ratio of melanocytes to keratinocytes at the DEJ?
1:10
A melanoacanthoma is..
A benign amelanocytic lesion
T/f: Solar lentigo is melanocytic
False
T/f: langerhans cells stain s100
True
T/f: Hair of Asian skin is vertically orientated to the skin
True
T/f: there is striated muscle in the dermis
True
T/f: langerhans cells are present in the epidermis only
False
T/f: the distal nail matrix lies under the lunula
True
Why does hypopigmentation occur in vitiligo, halo naevi and cryotherapy
A loss of melanocytes
Vitamin C plays a crucial role in what extracellular protein?
Collagen
What level is considered severe vitamin D deficiency?
<12.5nmol/L
T/f: there is no evidence of toxicity at vitamin D doses of up to 5000IU/day
True
A reed nevus is always pigmented and has spindle cells
True
A melanoma with a nodular component is by definition a nodular melanoma
False
A melanoma that is confined to the epidermis, extends down the hair follicle to the fat on the scalp, is Clark level 5
False
The difference between AK and IEC is that in AK, there are a few normal cell layers in the stratum spinosum
True
Cell keratinization is a sign of poorly differentiated SCC
False
