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.
comments powered by Disqus. A noun is a part of speech that names a person, place, thing, idea, action or quality. All nouns can be classified into two groups of nouns, either common or proper.1  Proper nouns refer to the individual name of a person, place or thing. noun is a part of speech that names a person, place, thing, idea, action or quality.