SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; SENAIT W. DYSON, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD
After negative results from multiple skin scrapings, high-power (original magnification ×10) mineral oil preparation revealed the wormlike creature found in the wrist sample. With the ovum recovered from the perianal cellophane tape test, the diagnosis suggested E vermicularis as the causative agent of the patient's dermatitis. An additional ova and parasites study was conducted on the patient's skin scrapings but was negative for pinworm. Treatment with mebendazole was initiated, and the patient showed dramatic improvement within 3 weeks.
Pruritic Scaly Plaques in a 75-Year-Old Hispanic Man—Diagnosis. Arch Dermatol. 2012;148(9):1073-1078. doi:10.1001/archderm.148.9.1073-g