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.
GRAMMAR. A noun is a part of speech that is used to name a person, place, thing, quality, or action. A noun can function as a subject, object, complement, appositive, or object of a preposition.Nouns can be singular or plural. The plural form of a noun is usually formed by adding s at the end of the noun.RAMMAR. A noun is a part of speech that is used to name a person, place, thing, quality, or action. A noun can function as a subject, object, complement, appositive, or object of a preposition.