has part has part characteristic of inheres in has modifier Deviation of the thumb Proximal placement of thumb 2009-01-29T04:40:23Z UMLS:C1865572 Thumb placement index greater than 0.55; or, the base of the thumb appears closer to the wrist than is typical. The technique for the thumb placement index is described in detail [Malina et al., 1973; Hall et al., 2007]. Briefly, the thumb placement index is the distance from the proximal crease of the index finger to the angle of the first interdigital space divided by the distance from the proximal crease of the index finger to the wrist flexion crease at the base of the thumb. This term should not be used with Preaxial polydactyly. Proximal mislocalization of the thumb. Low-set thumb HP:0001170 Proximally placed thumbs Attachment of thumb close to wrist HP:0009623 Low implantation of the thumb HP:0005668 abnormal mislocalised proximally manual digit 1