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Intro to dermatology - Coggle Diagram

- - - - Primary lesion: initial lesion OR secondary lesion: changes due to exogenous factors/time.
        Primary lesions:
        1)nonpalpable : macule (<1cm) or patch (>1cm)
        2) elevated: papule (<1cm), plaque (>1cm)
        3) subcutaneous (nodule)
        4) contains liquid: vesicle (<1 cm), bulllae (>1cm), contains
        5)pus: pustule.
        Secondary lesions:
        1) crust: dried serum, blood or pus
        2) scale: accumulation of keratin (hyperkeratosis). can be silver/plate like [psoriasis], powdery [tinea versicolor], greasy, gritty, collared
        4) erosion: loss of partial or full epidermis
        5) ulcer: loss of epidermis + part of dermis
      - Shapes and configuration: annular/arcuate- (ring shaped), angulated, linear, grouped, follicular, reticulated (net like, lacy pattern)
      - Color: yellow :keratin, cholesterol (sebaceous lesions, lipid laden lesions), other: (solar elastoisis, necrobiosis, resolving hemosiderin)
        Black: superficial epidermal melanin, coagulative necrosis
        Brown: basal layer of epidermal melanin, hyper plastic epidermis
        blue: melanin in reticular dermis, blood in veins/dermis, drugs/deposits in dermis
        white: absence of. melanocytes or melanin, fibrosis, calcium and gouty deposition, macerated stratum corneum
        Red blood cells in papillary dermis, dermal inflammation- pink (urticaria), dark red (cellulitis)
        salmon pink-papulosquamous disease
        red-violet= violaceous: hemogloibin in reticular dermis, interface dermatitis
    - - psoriasis vilgaris: scalp and extensor surfaces
        herpes zoster: dermatomal
        atopic dermatitis: back of neck and flexor surfaces
        photodistribution: lupus, sunburn