Card Set Information
What are the main histologic components of the dermis?
Below the epidermis
Papillary layer- Meissner corpuscle & Kause end bulb
Reticular layer- Pacinian & Ruffini corpuscle
Compare basal cell & squamous cell carcinoma
Basal- most common form of skin cancer; pearly in appearance (on face)
Squamous- sun damaged skin; scaly spots; cancer
What are the main functions of the skin?
covers soft tissue, protection, regulate body temp, sensation from environment, water barrier, 1st line of defense, absorb UV light
raised lesion <1cm
What is scabies?
Skin disease cause by a mite that lives in the epidermal layer
Contagious and itchy
any loss of surface coverage
inflammation of the hair follicle
raised lesion >1cm
List ABCDE diagnosis of malignant melanoma
A- asymmetrical border
B- border irregularity
C- color change
D- diameter change
E- elevated/ expanding
What is seborrheic keratosis?
Slightly elevated surface, rough wartlike texture
Rolls with skin, not anchored
On face, chest, shoulders, back, etc
Skin infection of group of hair follicles
Forms lump deep in skin and contains pus
What is urticaria?
Itchy rash that appears/ disappears anywhere on the body
Associated with allergies
What is albinism?
Hereditary inability of melanocytes to produce melanin
Increased possibility of skin cancer
pus filled blister
raised red itching lesion
What are the histologic components of th epidermis?
Stratified squamous keratinized epithelium
Contains keratinocytes, melanocytes, Lagerhans cells, and Merkel cells
Describe superficial dermatophytosis (fungal infection)
Ringworm, athlete's foot, jock itch
Can spread by touching an infected person, damp surfaces, or from a pet
Describe pathology of acne and explain pathogenesis
Bacterial skin condition that causes pimples (whiteheads, blackheads)
Tiny pores in surface of skin become clogged
Most important signs of skin cancer?
Atypical moles/ growth on skin
Lesions that itch, bleed or don't heal
What is seborrheic dermatitis?
Causes flaky white/yellow scales to form on oily patches of skin around scalp and ear
fluid filled cavity
Involves hair follicle and nearby skin tissue
Compare freckle with lentigo and nevus
Freckle- group of melanocytes
Lentigo- larger group of melanocytes
What is ichthyosis?
Fish scale disease (autoimmune)
Scaly skin on legs and arms
Cycling epidermal layer faster than usual
fluid filled blister
Common bacterial infection of the skin
Single/many blisters filled with pus
Increase in number of proliferating cells in stratum basale and stratum spinosum
Greater epidermal thickness and more rapid renewal of epidermis
malignant tumor of melanocytes
What is eczema?
Intensely itchy rash that appears as dry skin (autoimmune)
No cure and not contagious
Condition runs in families and often occurs with asthma and hay fever
Describe insect bites
Skin reaction that lasts up to a few days
Different insects inject different irritants into the skin that cause irritation