Abnormal palate morphology Narrow palate Width of the palate more than 2 SD below the mean (objective) or apparently decreased palatal width (subjective). Decreased palatal width Decreased transverse dimension of palate HP:0000189 Narrow palate Narrow roof of mouth Palatal width is measured as the distance between the maxillary first permanent molar on the right and left sides, at the lingual cervical line, using a specific device. Palate width is typically assessed subjectively in routine clinical practice. Narrowing is often associated with a High palate, but this should be assessed and coded separately. Gingival overgrowth can give the impression of a narrow palate but should be distinguished and coded separately. The term gothic palate is used to indicate that the roof of the palate is not round but rather has an inverted V-shape, and therefore, only the upper part of the palate is narrow. UMLS:C1398312