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.
A noun phrase is word group with a noun or pronoun as its head. The simplest noun phrase consists of a single noun, as in the sentence  Bells were ringing..The head of a noun phrase can be accompanied by modifiers, determiners (such as the, a, her), and/or complements, as in .The cheerful bells of the church were ringing..he simplest noun phrase consists of a single noun, as in the sentence  Bells were ringing.. The head of a noun phrase can be accompanied by modifiers, determiners (such as the, a, her), and/or complements, as in . The cheerful bells of the church were ringing..