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NB-UVB Safety — SCE Dermatology MCQ

Instant feedback + full explanation. One question, done properly.

HardPhotobiologyNB-UVB SafetySCE Dermatology

A patient receiving whole-body NB-UVB misses four consecutive treatments for non-medical reasons. There was no preceding erythema. Under the current Photonet missed-treatment protocol, what dose should be given on return?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Administer 50% of the preceding NB-UVB dose and resume cautious increments thereafter

Explanation lettering: E = shown as A · D = shown as B · A = shown as C · B = shown as D · C = shown as E

E is correct. The Photonet missed-treatment protocol distinguishes the number of consecutive omissions. One missed UVB treatment can continue previous increments, two repeat the previous dose, three use the penultimate dose, and four to six require 50% of the last treatment dose. More prolonged interruption triggers medical review or repeat phototesting rather than automatic resumption.

Reference: Photonet National Managed Clinical Network: phototherapy treatment protocols: https://cdn.bad.org.uk/uploads/2023/03/NSD610-008.05-Photonet-Treatment-Protocols.pdf