Floriane Céré Flashcards
(32 cards)
Types of hair
Guard hairs (primary) +Sebaceous gland+sweat gland+musculous arector pili Undercoat hair (secondary)+sebaceous gland
Cycle of hair
Anagen : growing period
Ketagen : transitional period
Telogen :resting period
Exogen : shedding phase
What control the cycle ?
Photoperiod, T°C, Nutrition, Hormone, general state of hair, genetic, poorly understood factors
Disorders of hair follicles
Atrophy, dysplasia
Sweat gland
Apocrin : no on foot pad/ nasal plane. At the mucocutaneous junction interdigital area and dorsum
Eccrin : Only on foot pad and nasal plane. Deep in the dermis
Examination of the hair coat
- Density
- Colour
- Gloss
- Closure
- Occurrence of loose hair
- Stiffness
- External parasite
Primary lesions
Macule (Patch if >1cm) Papule Plaque Nodule Wheales Vesicle Pustule Cysta
Wheal?
sharply circumscribed raised lesion consisting of oedema (urtica)
Tuber?
Inflammatory elevaton ofpapillary zone of skin or mucous mb
Nodule?
circumbscribed, solid elevation, >1cm , into deeper layer of skin
Plaque?
larger, flat-topped elevation formed by extension/coalition of papules
Papule?
small solid elevation of skin, >1cm , can palpate solid mass
Angiodema ?
Huge hive of of a distensible region
Vesicle ?
sharply circumscribed elevaiton of the epidermis filled with clear fluid
Bullae?
Vesicle>1cm
Cyst ?
Epithelium-lined cavity containing fluid or solid material . Smooth and well circumscribed
Pustule?
Small, circumscribed elevation of epidermis that filled with pus.
Abscess?
Demarcated fluctuant lesion resulting from a dermal or subcutaneous accumulation of pus.
Pirmary or secondary lesions?
Scales Crust Comedones Follicular cast Pigmentary changes
Scale?
Accumulation of loose fragment of the horny layer skin (cornified cell)
Crust ?
Formed when dried exudate, serum, pus, blood, cells, scales
Comedon?
Dilated hair follicle filled with cornified cells and sebaceous material.
Follicular cast?
accumulation of keratin and follicular material that adhere to the hair shaft
Secondary lesions
Epidermal collarette Excoration/erosion Ulcer Scar Chap, fissure Lichenification Callus Necrosis