Abstract: A 65 year old man presented with a history of erythroderma for 3 weeks.
History: A 65 year old man presented with pruritic scaly erythematous patches on the chest about 3 weeks ago. Then he noticed the rashes spreading to the abdomen and back. Now it has spread to the face and both upper and lower extremities. He had no fever or other constituional symptoms. He denied taking any previous medication or health supplements.There was no past history of psoriasis or eczema.
Examination showed extensive multiple scaly erythematous patches on the abdominal wall, entire back and thighs. His scalp was scaly too. Over the lower back and abdominal wall, the erythema was confluent and generalised with multiple erythematous patches with islands of white in between. The lesions has an irregular margin. There is no follicular hyperkeratosis. The nails were normal. Both palms and soles appeared normal and not hyperkeratotic.
Diagnosis: Erythroderma - Extensive psoriasis vs pityriasis rubra pilaris