“…Oesophageal involvement in lichen planus is very rare, only 17 cases [7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]and a series of 6 patients in 15 years from the Mayo Clinic [23]have been reported in the literature so far. This complication is probably underestimated, since a small study in 1990 on 19 patients with OLP demonstrated that a quarter of those had oesophageal involvement [24](table 1).…”