Aplasia/Hypoplasia of fingers Small finger UMLS:C0575827 Small finger This is a bundled term, comprising Short finger and Slender digit, but it is so widely used that it is included. This term is only used if the finger has the normal number of phalangeal segments. An appropriate alternative term for the first digit is Small thumb, when it is the only digit affected. When a thumb and one or more fingers are affected, it may be more economical to specify Small fingers, F1-5 instead of separately specifying Small thumb and Small fingers F2-5. SNOMEDCT_US:299058009 Significant reduction in both length and girth of the finger compared to the contralateral finger, or alternatively, compared to a typical finger size for an age-matched individual.