What stems are used in medicine?

In medicine, several types of stems are utilized, including stem cells, which have the ability to differentiate into various cell types and are used in regenerative medicine and therapies for conditions like leukemia and spinal cord injuries. Additionally, plant stems, such as those from willow (which contains salicylic acid), are used in traditional medicine for their analgesic properties. Other stems may also be explored for their bioactive compounds in pharmaceuticals.