Case 46: A 17 y.o. male was seen at Wenatchee Valley Clinic (Wenatchee, WA) for an asymptomatric 2-3 cm subcutaneous anterior chest wall nodule that of two weeks duration. Born near Acapulco, Mexico he had moved 5 years earlier to North Central Washington. In good health, he liked to swim in Lake Chelan, a mountain lake, and occasionally the Columbia River. His family had dogs when they lived in Mexico. He liked seafood. He had not traveled out of North America. The histology is shown here. What is the diagnosis?

case and image courtesy of William Muth MD http://www.infdiseasesconsultants.com/idcase5.php

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Image 46: This is the image of the scolex of a juvenile Taenia solium-like cestode, already evaginated from a cysticercus and rarely seen in histology sections. The hooklets and suckers are more easily seen at higher magnification below.