case_images: PMC9532255_01
case_images: Large dark red patches can be seen on the back of the buttocks, with a large number of silver-white scales attached to them, most of which are fused into pieces, which are map-shaped and annular, and local skin lesions show lichen-like changes.
case_images: CCID-15-2097-g0001.jpg
case_images: PMC9532255_01_CCID-15-2097-g0001.jpg
case_images: f0001
case_images: The patient visited our hospital in November 2019 (Figure 1) and was diagnosed with severe plaque psoriasis.
case_images: Erythematous scales on the buttocks and back basically subsided, leaving hazel pigmentation.
case_images: CCID-15-2097-g0002.jpg
case_images: PMC9532255_01_CCID-15-2097-g0002.jpg
case_images: f0002
case_images: A re-examination in June 2020 showed that the systemic rash had generally resolved (Figure 2).
case_images: A large, diffuse dark erythema on the back of the buttocks with thickened skin and bright red margins, scales and hyperpigmentation.
case_images: CCID-15-2097-g0003.jpg
case_images: PMC9532255_01_CCID-15-2097-g0003.jpg
case_images: f0003
case_images: An examination in August 2021 revealed a scald-like rash on the buttocks and back (Figure 3) accompanied by redness, swelling, heat, pain, occasional nausea and vomiting, poor appetite, and delayed response.
case_images: The erythema infiltration of the buttocks was aggravated, and part of the skin was pink and the pain was severe.
case_images: CCID-15-2097-g0004.jpg
case_images: PMC9532255_01_CCID-15-2097-g0004.jpg
case_images: f0004
case_images: The rash continued to worsen over 4 days (Figure 4).
case_images: The redness and swelling subsided, the pain was relieved, and a large area of pigmentation remained.
case_images: CCID-15-2097-g0005.jpg
case_images: PMC9532255_01_CCID-15-2097-g0005.jpg
case_images: f0005
case_images: The patient was re-examined 10 days later; he was found to have significant regression of the redness and swelling, with large patches of residual pigment deposition (Figure 5).