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Plasma cell mucositis of the distal airways
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Plasma cell mucositis is a rare idiopathic condition consisting of a marked infiltration of mucosa by plasma cells that may involve the mucous membranes of the upper aerodigestive tract—namely, the oral mucosa, gingiva, supraglottic and glottic larynx, and the trachea. While plasma cell mucositis is usually considered benign, cases of critical stenosis of the upper airway have been reported.1,2 We present a case of plasma cell mucositis involving the trachea and bronchi. This pattern of lower respiratory tract involvement has not previously been described.
A 55 year old woman, a lifelong non-smoker, presented with chronic cough, dyspnoea, and stridor. Pulmonary function tests showed a moderately severe …