Sentence:  ‘In a sense, the problems experienced at Bristol are like a <WSD>microcosm</WSD> of what is happening in the NHS - experienced surgeons battling against difficult circumstances, with inadequate resources and in a culture where the finding of scapegoats appears to be put before the finding of solutions.' 
Meaning of the word marked with <WSD> tags:  A smaller system which is seen as representative (of) a larger one. (from 17th c.)