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pg. 1
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Complete i-Human Week 4 Case Study # 13-Year-
Old Female with Itchy Skin # iHuman Case Analysis
with HPI Physical Exam Differential Diagnosis
Diagnostics & Management Plan
SECTION 1: HISTORY OF PRESENT ILLNESS (Q1–10)
Q1
Which OLDCARTS element is MOST critical for narrowing diagnosis?
A. Timing
B. Location
C. Severity
D. Context (exposure history)
Answer: D
Rationale: Exposure (household spread) strongly suggests contagious
etiology like scabies.
Q2 (SATA)
Which additional history questions are HIGH-YIELD?
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A. Anyone else itching at home
B. New soaps/detergents
C. Travel history
D. Diet changes
Answer: A, B, C
Rationale: Helps distinguish scabies vs contact dermatitis vs infectious
causes.
Q3
Nighttime pruritus is MOST associated with:
A. Eczema
B. Psoriasis
C. Scabies
D. Urticaria
Answer: C
Q4
Which history finding supports allergic dermatitis over infection?
pg. 3
pg. 1
,2|Page
Complete i-Human Week 4 Case Study # 13-Year-
Old Female with Itchy Skin # iHuman Case Analysis
with HPI Physical Exam Differential Diagnosis
Diagnostics & Management Plan
SECTION 1: HISTORY OF PRESENT ILLNESS (Q1–10)
Q1
Which OLDCARTS element is MOST critical for narrowing diagnosis?
A. Timing
B. Location
C. Severity
D. Context (exposure history)
Answer: D
Rationale: Exposure (household spread) strongly suggests contagious
etiology like scabies.
Q2 (SATA)
Which additional history questions are HIGH-YIELD?
pg. 2
, 3|Page
A. Anyone else itching at home
B. New soaps/detergents
C. Travel history
D. Diet changes
Answer: A, B, C
Rationale: Helps distinguish scabies vs contact dermatitis vs infectious
causes.
Q3
Nighttime pruritus is MOST associated with:
A. Eczema
B. Psoriasis
C. Scabies
D. Urticaria
Answer: C
Q4
Which history finding supports allergic dermatitis over infection?
pg. 3
