Hair, Nails, Oral Mucosa Flashcards Preview

Week 44: Rash > Hair, Nails, Oral Mucosa > Flashcards

Flashcards in Hair, Nails, Oral Mucosa Deck (15)
Loading flashcards...
1

3 types of hair

Terminal: large, pigmented
Vellus: short, non-pigmented
Lanugo: fine hair on fetal body, shed after birth

2

Phases of the hair follicle cycle

Anagen (growth)
Catagen (regression or involution)
Telogen (rest phase)
Exogen (shedding)
Kenogen (empty follicle)

3

Ciciatricial vs non cicatricial

Scarring vs non scarring alopecia

4

Scarring alopecia

Less common
Irreversible loss of hair
Destruction of the hair follicle with subsequent scarring of the surrounding dermis
Inhibits further growth of hair

5

Signs of scarring alopecia

History of burning, painful or itching
Shiny, taut scarred skin
Erythema and scaling of scalp
Peri follicular scale
Lonely hairs
Tufted hairs

6

Non scarring alopecia

Generally reversible
Pattern hairloss, hair cycling disorders, immune mediated, trichotillomania

7

Telogen effluvium

Non scarring hairloss
10% of hairs are shed (significant impact)
Triggered stress (major illness, hospitalization, post partum)
Generalized diffuse alopecia

8

Miniaturization

Change in terminal hairs to vellus hairs
Due to conversion of testosterone to DHT
Found in pattern hairloss

9

Treatment for pattern hairloss

Topical Minoxidil solution or foam
Systemic 5a reductase inhibitors (finasteride)
Hair transplantation (still need to continue oral finasteride or topical minoxidil)

10

Trichotillomania

Pulling out hair - often due to stress or psych disorder
Hairs of varying lengths
Broken ends
Irregular, angular shaped bald patches

11

Alopecia areata

Bald, round "peach" coloured patches
Exclamation point hairs
Regrowth with white hairs
Can progress to totalis or universalis subtypes
Check for geometric nail pitting

12

Exclamation point hairs

Inflammation at the bulb of the follicle thins the hair

13

What part of the nail does the
1. proximal
2. distal
matrix form?

1. dorsal nail plate
2. ventral nail plate

14

Oil drop sign

Focal nail bed parakeratosis (retention of nuclei from accelerated keratinization)
Subsequent onycholysis and accumulated serum and cellular debris

15

Lichen planus

White reticulate patch on oral mucosa
Do a full cutaneous exam when you see it
Inflammatory mucosal condition