TY - JOUR T1 - An unusual progressive stridor JF - Breathe JO - Breathe DO - 10.1183/20734735.0006-2020 VL - 16 IS - 2 SP - 200006 AU - Matveï Apraxine AU - Philippe Mineur AU - Jean Huet AU - Gabriela Beniuga AU - Benoit Colinet Y1 - 2020/06/01 UR - http://breathe.ersjournals.com/content/16/2/200006.abstract N2 - A 71-year-old man came to our pulmonary consultation with 6 weeks of progressive dyspnoea, hoarseness and, more recently, stridor. His past medical history included colorectal cancer treated with surgery and adjuvant chemotherapy, and type 2 diabetes mellitus. Prior to our consultation, his general practitioner had already ordered a chest computed tomography (CT) scan. The patient had undergone this CT scan 3 days before the consultation and it did not reveal any abnormalities.A flow–volume curve with a flattening of the inspiratory and expiratory limb suggests a proximal obstruction of the upper airways. Plasma cell neoplasms need to be considered in the differential diagnosis of an invasion of the upper respiratory tract. https://bit.ly/2K9lOXjWe sincerely thank the patient for giving his consent to publish his case and the images. ER -