Proteus syndrome is a rare, genetic condition that causes abnormal growth of tissues and bones. While there are no official synonyms for Proteus syndrome, some people use other terms to describe it, such as "Elephant Man Syndrome" or "Giantism Syndrome." These terms, however, are misleading and can be offensive to people with Proteus syndrome. Another term that is sometimes used is "megalencephaly-capillary malformation syndrome." This term refers to the enlarged head and irregular capillaries that are common in people with Proteus syndrome. While it is important to be aware of these terms, it's always best to refer to the condition by its official name, Proteus syndrome.