Dermatoses From Physical Factors Flashcards Preview

Dermatology > Dermatoses From Physical Factors > Flashcards

Flashcards in Dermatoses From Physical Factors Deck (38):
1

First degree burn

Congestion of superficial blood vessels

2

Superficial 2nd degree burn

Transudation of serum from capillaries -> edema

3

Deep 2nd degree burn

Pale and anesthetic
To reticular dermis

4

3rd degree burn

Appendages destroyed

5

What facilitates the removal of hot tar burns

Polyoxyethylene sorbitan or sunflower oil

6

Drugs that induce milia crystallina

Isotretinoin, doxorubicin, bethanechol

7

What layer is the injury to in miliaria rubria

Prickle layer = SS
"Prickly heat"

8

Miliaria pustulosa

Typically preceded by another dermatosis that blocks sweat ducts
Intertriginous, back of bedridden pts
Pustules Independent of hair follicles
Recurrent episodes in type 1 pseudohypoaldosteronism

9

Level of occlusion is miliaria profunda

Upper dermis
Usually lasts only an hour

10

Acrocyanosis but not raynauds

No ulceration
Not temporary

11

May induce acrocyanosis of nose, ears, dorsal hands

Inhaled butyl nitrite

*AC also induced by IFN alpha
* may be seen in anorexia

12

Puffy hand syndrome

Lymphedema due toe injection of narcotics to dorsal hand

13

Pernod may be presenting sign

Leukemia cutis

14

Treatment of frostbite

Rapid rewarming btw 37 and 43 degrees c

*tpa may reduce amputation
*arthritis may be a late complication

15

UV and clothing

Baggy clothes, clothes that have been washed more are more effective filters

*Tinosorb containing material for laundering = sunguard

16

Yellowish papules along the sides of the neck from sebaceous hyperplasia from sun damage

Fibroelastolytic papules of the neck

17

Pearly papule on the face or chest from elastosis

Dubreuilh elastoma

18

Effects of UV

Induce ROS through AP-1
Increases transcription of MMP 1 (collagenase) MMP 3 (stromoelysin 1), and MMP9 (gelatinase) to form collagen fragments
Increased deposition of fibulin 2
Decreased types 1&3 collagen

19

Adult colloid millium derived from

Elastic fibers

* associated with petrochemical exposure

20

Juvenile colloid milium

Apoptotic keratinocytes

21

Action spectra for photo allergy

320-425

22

% of pmle patients with a positive ANA

10-20%

23

PMLE action spectra

UVA (MC) >> UVB or A+B >> visible light

* women more commonly sensitive to UVA alone, men more commonly to visible lt

24

Actinic prurigo

May occur in sun protected sites like buttocks
60% resolve in 5 yrs in children, adults more persistent
Hardening does NOT occur

25

Solar urticaria

UVA

26

Drugs associated with solar urticaria

TCN (but not mino)
Chlorpromazine
Progesteronal agents
Repirinast

27

SU associations

PCT, EPP, SLE

28

Hydroa vacciniforme action spectra

UVA (330-360)

29

What % of hiv pts have photosensitivity

5%, typically cd4<200

30

Chronic actinic derm action spectra

UVA + UVB + visible MC > UVA + UVB > A or B

31

Eosinophilic polymorphic and pruritic eruption associated with radiotherapy

Days to mo after
Not limited to radiation sites

32

MC cancer after radiotherapy

BCC

*scc more common on dorsal hands

33

MC site for pressure ulcer

Pelvic area

34

Fracture blisters

Occur due to vascular compromise
Days to 3 weeks after
Esp lower leg

35

Photosensitive tattoo pigment

Cadmium = yellow

36

DLE has been reported in what color tattoos

Red

37

Pseudolymphoma tattoo reaction

Red

38

Granulomas

Silicone, mercury (sarciodal, positive gold lysis test), zirconium (a Lila, sarcoidal), silica (associated with systemic sarcoid)