“…Most reports concerning medicinal leech therapy focus on cosmetic and reconstructive surgery. However, leech therapy has been tested for many conditions over the past two decades, including migraine [17,18], knee osteoarthritis [19][20][21][22][23][24][25], cardiovascular disease [26][27][28], skin disorders [29], diabetic foot ulcers [30][31][32], priapism [33], macroglossia [34,35], cancer [36,37] and skin wounds [38,39]. For most of these conditions only individual case studies were published [39], but migraine and knee osteoarthritis are exceptions.…”