The medial sural cutaneous nerve is a sensory nerve that runs through the back of the leg and foot. There are a few different synonyms that can be used to refer to this nerve, depending on the context. One possible synonym is the posterior sural cutaneous nerve, which runs parallel to the medial sural cutaneous nerve and supplies similar regions of the leg and foot. Another synonym is the tibial nerve, which is a larger nerve that includes the medial sural cutaneous nerve as one of its branches. Finally, some sources might use the term "saphenous nerve" to refer to the medial sural cutaneous nerve, although this is technically a distinct nerve that runs on the inside of the leg.