Chapter 9 The gastrointestinal system/Fig 9.16.jpg

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Pleomorphic adenoma (on the left) separated from normal parotid tissue (on the right) by a thin capsule of collagenous tissue. Pleomorphic adenoma is a benign epithelial neoplasm of ‘mixed patterns’, here represented as fused glands (left) and spindle-celled cartilage-like tissue (centre).