Pityriasis rosea

3,112 views

Assessments
Pityriasis rosea

Flashcards

0 / 13 complete

Questions

0 / 2 complete

High Yield Notes

6 pages

Figure 6.2 The histological appearance of lichen planus. There is a lymphocytic inﬁltrate at the junction between the dermis and epidermis which is known as interface dermatitis. PITYRIASIS ROSEA osms.it/pityriasis-rosea PATHOLOGY & CAUSES ▪ Self-limiting acute dermatosis ▪ Unknown etiology; may be viral in origin, related to human herpesvirus 7 (HHV7) SIGNS & SYMPTOMS ▪ Upper respiratory tract infection may precede rash ▪ “Herald patch” ▫ Solitary oval red plaque, usually located on trunk ▫ First skin lesion ▫ Spreads with central clearing, fading in 2–10 days ▪ 1–2 weeks after herald patch, multiple round/oval pink (white individuals of European descent)/dark brown (black individuals of sub-Saharan African descent) plaques with central scale appear 34 OSMOSIS.ORG ▪ Trunk, neck, upper arms, thighs; “Christmas tree” progression ▫ Across chest, then rib-line ▪ Pruritus ▪ Systemic ▫ Low-grade fever, headache, nausea, fatigue Figure 6.3 A herald patch is often seen at the onset of pityriasis rosea. It is a slightly raised, erythematous patch with superﬁcial scaling.

Flashcards

Pityriasis rosea

13 flashcards

Questions

USMLE® Step 1 style questions USMLE

2 questions

Preview

A 20-year-old man presents to the office for the evaluation of a skin rash. He reports that initially, there was a singular pruritic, salmon-colored patch that appeared on his back ten days ago. After two days, the patch slowly began to clear centrally. Approximately four days after the appearance of the initial rash, multiple similar but smaller lesions started to appear on his back and chest. Review of systems is significant for malaise and headache. Past medical history is significant for a recent cold that resolved spontaneously two weeks ago. Temperature is 37.0°C (98.6°F), pulse is 80/min, respirations are 17/min, and blood pressure is 125/80 mmHg. Physical examination findings are shown.

Reproduced from Wikimedia Commons

Which of the following best describes the progression of this patient’s skin rashes in the next several weeks?

Memory Anchors and Partner Content