A solitary pulmonary coin lesion can be attributed to a great variety of diseases. One of the extremely rare etiologies of the solitary pulmonary coin lesion is the human pulmonary dirofilariasis (HPD). HPD is attributed to an infection of the parasite Dirofilaria (D.) and especially to the type Dirofilaria immitis (DI). D. is a nematode that is also known as dog heartworm since it parasites in dog’s heart.
