Intro to Dermatology and Benign Skin Lesions Flashcards
layers of the skin from outermost to inner most
stratum corneum, leucidum, granulosum, spinosum, basal layer
what determines the color of skin
white people and dark skinned people have the same number of melanocytes. it is merely the type of melanocytes and their ability to transfer melanin to the neighboring keratinocytes that differs.
- there is no difference in sensation or depth of epidemis or dermis
- it’s not the number of melanocytes- its the QUANTITY OF PIGMENT PRODUCTION and ability to transfer pifment to keratinocytes
common benign skin lesions
Cherry haemangioma Venous Lake Dermatofibroma Spider Angioma Seborrheic Keratosis Acrochordons Fibrous Papule of the nose Pyogenic Granuloma
primary morphology
etiology
symptoms
treatment
Definition: Extremely common benign vascular cutaneous lesion. Increase in number with age and are often widespread. Often a cosmetic concern to pts. Often found in the trunk.
Primary morphology: Papule. bright red to violaceous macules or domed papules.
Secondary morphology: None
Etiology: Proliferation of dilated venules.
Symptoms: Mostly cosmetic
Treatment: None necessary unless irritated or bleeding 2º to trauma.
primary morphology
etiology
symptoms
treatment
morphology: papule: dark purple
etilogy: dilation of venules thought to be cuased by sun damage–> weakening the vascular adventitia and permits dilation of superficial vascular strcutures
treatment: no treatment necessary. Often cosmetic concerns. may resemble malignant lesions
primary morphology
sex (that its mainly seen in)
etiology
symptoms
treatment
dermatofibroma
primary morphology: papule consiting of collagen, macrophages, capillaries and fibroblasts. often persists for life.
sex: women in young adulthood
etiology: unknown; some may arise from trauma or insect bites
symptoms; may be tender or pruritic
treatment: not necessary
primary morphology
etiology
symptoms
treatment
spider angioma
primary morphology: telangiectasia. Central arteriole with various small twisted vessels radiating out. Has classic refuel pattern where if pressed down and released it will refill from the center out.
etiology: spontaneous. women can develop these during pregnancy. oral contraceptives can cuase due to high estrogen levels.
symptoms
treatment: none/discontinue contraceptives
primary morphology
secondary morpholgy
symptoms
treatment
subtype and definition
Seborrheic Keratosis: benign neoplasms of epidermis on back and neck. stuck on appearance.
primary morphology: keratosis or keratotic papule or plaque. well defined borders. increases in number with age. scratching can cause scaling. often seen on skin relaxation lines of skin aka Langer lines.
secondary morpholgy: scales or crust if scratched
symptoms:: may be painful or itchy when traumatized–> can lead to bleeding or redness
treatment :none
subtype and definition: DERMATOSIS PAPULOSIS. Papular seb K on the face of darker skinned individuals.
where do you usually find Seb K?
often seen on skin relaxation lines of skin aka Langer lines.
primary morphology
secondary morpholgy
symptoms
etiology
treatment
acrochordons (skin tags)
primary morphology: papule. benign cutaneous growths. small flesh-colored pedunculated papules. most commonly found on eyelids, neck, axillary, and inguinal region.
secondary morpholgy
etiology: associated with age, diabetes, and obesity.
symptoms: usually asymptomatic but can be irritated by jewelry
treatment: can freeze off or may fall off spontaneously
primary morphology
secondary morpholgy
etiology
symptoms
treatment
Fibrous Papules of the nose
primary morphology: papule. flesh colored papule on the nose or central face. may be difficult to distinguish from other small papule lesions.
secondary morpholgy
etiology: unknown
symptoms: may bleed with trauma
treatment: none
primary morphology
secondary morphology
etiology
symptoms
treatment
pyogenic granuloma
primary morphology: papule. rapidly growing benign VASCULAR growths. usually present as a solitary red papule or nodule that grows quickly and bleeds easily.
secondary morpholgy
etiology: unknown, but associated with isotretinoin, topical retinoids, indinavir, 5-fluorouracil, capecitabine, mitoxantrone, and anti-epidermal growth factor inhibitors (anti-EGFRs).
Symptoms: bleeds easily
treatment: surgery, curettage, cryotherapy
