62 yo F with 3 wk hx of progressive SOB, mild pain in R chest wall, non-productive cough. 12 lb wt loss over last 3 months. Diagnosed w/ R breast cancer 6 yrs ago treated w/ lumpectomy and radiotherapy and chemo. In mild resp distress, appears cyanotic and cachectic. BMI 20. Pulse 88, RR 24, BP...