“…It is important to note that in 19.4% patients diagnosed with achalasia based on HRM findings, the barium study reported the presence of some other non-specific motility disorders. These findings were consistent with studies performed by El-Takli et al, in which the diagnosis of 42% patients with achalasia was missed by barium and by Schima et al, in which barium swallow correctly identified 58% of the cases diagnosed monometrically [4][5][6][7][8][9][10][11][12][13][14][15]. The low sensitivity of barium esophagram was attributed to the absence of the characteristic radiographic findings in most of the cases [4].…”