lities can develop after birth if you have have rickets and other diseases that affect bone structure.Common CausesSkeletal limb abnormalities may be due to:CancerGenetic diseases and chromosomal abnormalities, including Marfan syndromeApert syndromeBasal cell nevus syndrome, Down syndrome, , Improper position in the wombInfections during pregnancyInjury during birthMalnutritionMetabolic disorders