A 19-year-old female was admitted to our department because of a hypertrophic palmaris digitalis II of the left hand displaying color changes. A thrill was easily palpated over the medial part of the finger. A review of her history revealed that this hypertrophy occurred after a blunt trauma to the left hand. Angiography showed arteriovenous fistulas between the digital branches of the radial and ulnar arteries and cephalic vein at the palmaris digitalis II of the left hand. These arteriovenous connections were closed with simple ligation under regional anesthesia. Post-operatively she had no sign of ischemia, and no thrill was palpated or auscultated.