A 31-year-old female with a rare cause of recurrent lower lobar collapses

A 31-year-old female presented to the emergency department with a 5-day history of feeling generally unwell, with a sore throat, breathlessness and a productive cough with expectoration of clear mucoid sputum. Her exercise tolerance, previously unlimited, had declined to approximately 90 m. She denied any pyrexia, rigors, haemoptysis or night sweats.
Can you diagnose this patient presenting to the emergency department with a short history of productive cough and breathlessness and a history of recurrent admission for chest infections? http://ow.ly/PoHQ30kmGPi