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Electron micrograph of bronchial mucosa from a child with chronic chest symptoms. Despite normal intrinsic ciliary structure, a general paucity of cilia is demonstrated. This is a common finding on ciliary biopsy in the setting of recurrent respiratory infections. Green arrow indicates cilia seen in cross-section. Blue arrow indicates cilia seen lengthwise. Image courtesy Matthew Stark, MD, Pathologist, Children's Hospital New Orleans.
