Subglottic stenosis induced by extranodal mucosa-associated lymphoid tissue lymphoma.

Mucosa-associated lymphoid tissue (MALT) lymphoma is usually associated with a chronic inflammatory disease or autoimmune disorders from which lymphoid tissue of MALT type arises as a prerequisite for lymphoma proliferation. Primary hematopoietic neoplasms of the larynx are rare. MALT lymphomas of the larynx are believed to arise from preexisting or acquired lymphoid tissue of the upper airway which is documented in the supraglottic region. Therefore, these are mainly located in the supraglottic and glottic areas, with only a few reported in the subglottic region. We report on a 50-year-old woman with a hoarseness, stridor, and developing exertional dyspnea. On indirect laryngoscope, multiple nodular lesions with smooth surface over the subglottis with subglottic steonsis was found. The biopsy confirmed the diagnosis of a MALT lymphoma. We hope to promote awareness and consideration of MALT lymphoma in the differential diagnosis in subglottic steonsis.