“…Trigger finger occurs primarily at the A1 pulley and tenosynovitis is the usual cause. However, although rare, triggering of the flexor tendon can occur in other areas and under other conditions (Al-Harthy and Rayan, 2003; Bartell and Shehadi, 1991; Cardon et al, 1999; Frewin and Scheker, 1989; Fujiwara, 2005; Gaffield and Mackay, 2001; Helal, 1970; Kazuki et al, 2005; Laing, 1986; Lee and Pho, 2005; Minami and Ogino, 1986; Moore, 2000; Oni, 1984; Rankin and Reid, 1985; Rayan, 1990; Seradge and Kleinert, 1981; Sherman and Lane, 1996; Smith et al, 1998; Stockley and Norris, 1990; Takami et al, 1993).…”