Causes. Retroperitoneal fibrosis occurs when extra fibrous tissue forms in the area behind the stomach and intestines. The tissue forms a mass (or masses) that can block the tubes that carry urine from the kidney to the bladder.
noun /naÊn/ n a word or group of words that refers to a person, place, or thing or any syntactically similar word (as modifier): a noun phraseAbbreviation: N, n Related adjective(s): nominal Etymology: 14th Century: via Anglo-French from Latin nÅmen name. Ënounal adj.
What is a noun? Nouns are words that indicate a person, place, or thing. In a sentence, nouns can function as the subject or the object of a verb or preposition. Nouns can also follow linking verbs to rename or re-identify the subject of a sentence or clause; these are known as predicate nouns.