Pruritus - No Primary Skin Lesion - Differential Diagnosis Algorithm



Blood Glucose:

 • Diabetes Mellitus

Liver Function Tests/Enzymes:

 • Cholestatic liver disease

Creatinine & BUN:

 • Chronic renal failure/uremia

TSH & T4:

 • Hypothyroidism

 • Hyperthyroidism

CBC & Differential:

 • Lymphoma

 • Leukemia

 • Polycythemia rubra vera

 • Essential Throbocythemia

 • Myelodisplastic syndrome

Psychiatric Disease:

 • Delusions of parasitosis



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