Additional testing may include testing of blood and
tissue samples, diagnostic imaging such as ultrasound and radiography, biopsies of masses, internal organs or bone marrow, and endoscopy including; bronchoscopy (lungs), cystoscopy (bladder & urethra), colonoscopy (colon & small bowel), gastroduodenoscopy (stomach & upper intestines), rhinoscopy (
nasal cavity), laparoscopy (minimally invasive surgery for biopsies of internal organs).
Endoscopy: If the breathing problem is caused by a blocked
nasal cavity or airway, this test will help determine the next step in treatment, and it may aid in collecting
tissue samples for testing.