This rash appeared 9 hours after a scuba dive. What is the diagnosis?: (A) Decompression sickness, (B) Jellyfish envenomation, (C) Mycobacterium marinum infection, (D) Phylum Porifera contact dermatitis
Answer is A. Answer A. Decompression sicknessCutis marmorata is a dermal manifestation of decompression sickness. Initially, there is erythema accompanied by pruritus, and then the rash spreads irregularly and deepens in color. It develops a mottled appearance, with areas of pallor surrounded by cyanotic patches. During recompression, the rash resolves.