What syndrome makes a preemie baby look like monkey?

The syndrome that makes a preemie baby look like a monkey is called the simian crease. This is a condition in which the palmar crease, which is the crease that runs across the palm of the hand, is located higher than normal. This gives the baby's hand a simian appearance, which is similar to the hands of monkeys and apes. The simian crease is usually a harmless condition and does not require any treatment. However, it can sometimes be associated with other medical conditions, such as Down syndrome and fetal alcohol syndrome.