The nature of possible underlying disease states including cancer or infections can often be detected by microscopically visualizing cytological changes in cells which are exfoliated and captured by fluid extraction from body cavity, brushings, washings, or fine needle aspirations.
Cloister definition, a covered walk, especially in a religious institution, having an open arcade or colonnade usually opening onto a courtyard. See more.
pillar-a fundamental principle or practice; science eroded the pillars of superstition. principle, rule-a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct; their principles of composition characterized all their works.