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Symptoms Head, eyes, ears, nose, and throat Headache Runny nose Sore throat Systemic Dry cough Abdominal pain (pseudoappendicitis if in the right lower quadranta) Signs Eyes Conjunctival suffusion Watery eyes Lower lid swelling Keratitis Throat Koplik spots Dark red buccal mucosa Oral ulcers Laboratory tests Complete blood cell count Leukopenia Relative lymphopenia Thrombocytopenia Unelevated erythrocyte sedimentation rate Other Elevated lactate dehydrogenase Elevated ferritin Elevated aminotransferases Warthin-Finkeldey cells on nasal swab cytology (early only) ↵a If appendectomy is performed, cytology shows Warthin-Finkeldey multinucleated giant cells.
Based on information in reference 5.