PDT

Question 1

ALA requires occlusion

Answer 1

F

Question 2

ALA is more hydrophilic than MAL

Answer 2

T

Question 3

Application of ALA does not require occlusion

Answer 3

T

Question 4

MAL requires premixing before use

Answer 4

False

Question 5

MAL uses red light

Answer 5

T

Question 6

MAL is converted to ALA by esterases

Answer 6

T

Question 7

MAL is available in a cream

Answer 7

T

Question 8

ALA and MAL are category C

Answer 8

T

Question 9

When ala is exogenously the control point is bypassed and ala is metabolized along the Haem
Pathway , inducing accumulation of porphyrins (esp protoporphyrin IX)

Answer 9

T

Question 10

ALA and MAL are highly flourescent

Answer 10

F

As opposed to their precursors MAL and ALA, non metal bound porphyrins are highly fluorescent

Question 11

Both ALA and MAL PDT are used off label in to of acne

Answer 11

T

Question 12

Allergy to peanut and almond oil contraindicates use of ALA

Answer 12

F

MAL Cream contains these

Question 13

MAL is contraindicated in porphyria

Answer 13

T

Question 14

Sun exposure on treated lesion sites and peripheral skin should be avoided for 24h after topical app of MAL and ALA

Answer 14

F

48h

Question 15

When ALA-PDT is used on large skin surfaces with shorter application time , photo toxic reaction is more intense

Answer 15

F

Less intense

Question 16

With ALA PDT, eodema May last up to one week and erythema up to 2 weeks .

Answer 16

T

Question 17

Prolonged facial erythema can occur for few months but is rare following PDT

Answer 17

t