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 is a part of speech that identifies a person, place, thing, or idea. In this lesson, in addition to learning how to identify nouns, you'll learn the difference between proper and common nouns and a bit about how nouns function in sentences. noun is a part of speech, and parts of speech simply refer to types of words. You may be familiar with a lot of basic parts of speech, like nouns, verbs, and adjectives. Nouns identify people, places, things, and ideas. Nouns can be categorized as either common or proper.