Definition of welt. 1 : a strip between a shoe sole and upper through which they are stitched or stapled together. 2 : a doubled edge, strip, insert, or seam (as on a garment) for ornament or reinforcement. 3a : a ridge or lump raised on the body (as by a blow or allergic reaction)b : a heavy blow.
The list of signs and symptoms mentioned in various sources for Polydactyly includes the 4 symptoms listed below: 1  More toes than normal. 2  More fingers than normal. 3  Extra digit on hand. 4  Extra digit on foot. 5  more information...Â».
Polydactyly results if thereâs an irregularity in this process: An extra finger forms when a single finger splits in two. The vast majority of occurrences of polydactyly are sporadic, meaning that the condition occurs without an apparent causeâbut some may be due to a genetic defect or underlying hereditary syndrome. African-Americans are more likely to inherit the condition than other ethnic groups.