Incompetent ankle perforating veins.
D000328:Adult; D000368:Aged; D000842:Ankle / Q000098:blood supply*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011300:Preoperative Care; D012501:Saphenous Vein; D014647:Varicose Ulcer / Q000601:surgery*