According to the ETROP study classification, which combination defines type 1 retinopathy of prematurity requiring treatment within 72 hours?
- A Zone I, any stage with plus disease; or zone I stage 3 without plus; or zone II stage 2 or 3 with plus ✓
- B Zone II stage 3 without plus disease in any infant
- C Any zone with stage 1 disease and plus disease
- D Zone III stage 2 or 3 with plus disease
Correct answer: A. Zone I, any stage with plus disease; or zone I stage 3 without plus; or zone II stage 2 or 3 with plus
Explanation
ETROP redefined the treatment threshold as type 1 ROP: zone I any stage with plus disease, zone I stage 3 without plus disease, or zone II stage 2 or 3 with plus disease, all warranting ablation within 72 hours. Type 2 ROP, consisting of zone I stage 2 without plus or zone II stage 3 without plus, is observed closely and treated only if it progresses. Zone III disease rarely reaches these thresholds and was not part of the type 1 definition.
Reference: AAO Basic and Clinical Science Course, Section 12: Retina and Vitreous, 2023-2024 ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.