Advanced Dermatology Case Mastery for FNP Students: Complex Rash Differentials Including Pityriasis Rosea, Secondary Syphilis, SLE, and Guttate Psoriasis with Full SOAP, Treatment Plans, and OSCE Prep i-Human Case: 25-Year-Old Female with New RashCase Metadata Element Detail Case Identifier i-Human Case Week #2 Patient Age 25 years Patient Height 5'5" (165 cm) Patient Weight 120.0 lb (54.5 kg) BMI 20.0 kg/m (normal) Reason for Encounter New rash Clinical Setting Outpatient clinic with x-ray, ECG, and laboratory capabilities Case Mode Learning Mode - Feedback appears after submitting each section; final performance review generated after case completion Case Author Lauren Paluch, DMSC, PA-C in collaboration with the iHP Content Team Case Synopsis This case presents a 25-year-old female elementary school teacher who seeks evaluation for a new rash involving her trunk. The rash began approximately 10 days prior to presentation with a single lesion on her lower back, followed by a more widespread eruption over the subsequent 5-7 days. The patient is otherwise healthy, takes only oral contraceptive pills, and has no significant past medicalhistory. This comprehensive case study is designed for medical learners to develop clinical reasoning skills in dermatology, including history-taking, physical examination, differential diagnosis, diagnostic testing, and management of