Dirofilaria repens- Patient had first noted a nodule below her left eye (Panel A). Five days later, it had moved to above her left eye (Panel B), and 10 days after that to the upper lip (Panel C). A physical examination showed a superficial moving oblong nodule at the left upper eyelid. A parasite was fixed with forceps and removed surgically (Panel D). The parasite was identified by means of a polymerase-chain-reaction assay as Dirofilaria repens, which is a zoonotic filarial nematode. #Dirofilaria #repens #clinical #photo #NEJM #parasite