Term
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Definition
| may be no lesions. Hair plucks may show normal anagen haird with broken tips |
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Term
|
Definition
[image]
Lesions produced by self trauma
may be mild to severe with extensive trauma |
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Term
|
Definition
hair loss without replacement- decreased coat densitiy with or without bald skin
- does not mean excess shedding |
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Term
| Focal to multifocal alopecia |
|
Definition
single or multiple disecrete patches
non-symmetrical and usually well demarcated |
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Term
|
Definition
|
|
Term
| Diffuse and complete Alopecia |
|
Definition
Diffuse: poorly demarcated, thinning of coat
Complete: well demarcated and areas of complete hair loss |
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Term
|
Definition
- may see excoriation, erythema, exudate
focal to multifocal
well demarcated
non symmetrical
broken hairs
anagen hairs
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Term
|
Definition
focal to multifocal
diffuse and complete
symmetrical
inflammatory
non inflammatory |
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|
Term
| Non inflammatory alopecia |
|
Definition
underlying skin normal to atrophic
- intact telogen hairs
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Term
|
Definition
accumulation of keratinocytes
primary scaling associated with keratinisation disorders
secondary scaling- more common- assoc. with any disease that effects skin turnover. |
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Term
|
Definition
[image]
greasy accum. of sebum and exudate on the skin surface
- may be malodourous if infected and inflammed- seborrheoic dermatitis |
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Term
|
Definition
[image]
Thickening of skin
Acanthosis: thickening of epidermis
Hyperkeratosis: Orthokeratosis-no nuclei, parakeratosis-retained nuclei
- assoc. with chronic inflammation. |
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Term
|
Definition
split in lichenified and or crusted skin
often painful and vulnerable to infection
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|
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Term
| Papules, plaques and nodules |
|
Definition
papule <1cm; nodule >1cm
plaque- flat topped |
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Term
|
Definition
[image]
Elevated patch of skin associated with dermal oedema
subcut oedema causes more severe swelling
- should be pitting
- type 1 hypersensivity- reactions involving with histamine release |
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Term
|
Definition
- enclosed epithelial lined cavity containing fuid or semi-fluid material
- neoplastic or developmental
sweat gland cyst-usually blueish tinged |
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Term
|
Definition
pustule- pus filled
vesicle < 1cm or bulla > 1cm
rapidly rupture will leave epidermal collarettes and crusts |
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Term
|
Definition
accum of dried exudate- blood , serum and or pus |
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Term
|
Definition
| not really a remnant of pustule, cause staph can release toxins that split the skin apart. |
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Term
|
Definition
Erosion: basement membrane intact, heals by re-epithelisation
ulcer: loss of BM exposing dermis- heals with scar |
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Term
|
Definition
sinus- draining tracts connecting to deeper tissues with surface- often ulcerated and under run
Fistulas: connect two epithelial lined compatments |
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Term
|
Definition
increase blood flow-blanches, if not then haemorrhage |
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Term
|
Definition
hyperpigmentation- increased, usually post inflamm or endocrinopathies
Hypopigmentation: loss, aging change, immune mediated diseases |
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Term
|
Definition
[image]
dilated hair follicle plugged with epidermal and sebaceous debris
- keratinastion disorders
- hyperadrenocorticism
- demodex |
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