English: A case of human breast myiasis caused by Lucilia cuprina : Ulcerate lesion in the right breast and larvae in the wound Abstract : Myiasis is a parasitic infection that occurs as a result of larvae, settling in living tissues and organs, observed especially in tropical regions and rural areas where animal contact is common. Diagnosis is established by observing larvae of Diptera species in tissues and organs. In treatment planning, determining the type of larvae as well as affected organ and systems is important in terms of treatment and follow up. In this case report, we discussed a female patient with ulcerated mass in the right breast in whom Lucilia cuprina larvae caused myiasis after a holiday in the summer in a village.