“…This technique is capable of imaging soft tissues without using ionizing radiation but has many disadvantages, including the high cost and the contraindication for certain patients. In numerous case reports (Krutchkoff and James, 1978; Brook et al , 1983; Hernandez et al , 1986; Williams and Greenberg, 1991; Kano et al , 1992; Mignogna et al , 2001) and series of patients (Rhodes and Stirling, 1965; Worsaae et al , 1982; Podmore and Burrows, 1986; Field and Tyldesley, 1989; Pachor et al , 1989; Zimmer et al , 1992; Kolokotronis et al , 1997; Girlich et al , 2002; Mignogna et al , 2003; Sciubba and Said‐Al‐Naief, 2003) the swelling of the lips has been followed up and assessed using clinical photographs. The use of photographs offers the advantage of keeping a permanent record to monitor the progress of the disease but is essentially at best only semi‐quantative and does not allow subtle changes to be detected.…”