How a polyp biopsy is taken depends on the location: 1  Colonoscopy or flexible sigmoidoscopy explores the large bowel. 2  Colposcopy-directed biopsy examines the vagina and cervix. 3  Esophagogastroduodenoscopy (EGD) or other endoscopy is used for the throat, stomach, and small bowel.  Laryngoscopy is used for the nose and throat.
11 doctors agreed: Several: Possible causes of pink eye (conjunctivitis) include bacterial or viral infection, allergic reaction, rosacea, dry eye, and autoimmune disease.
Part 1. Pink Eye Basics. Determine which kind of pink eye you have. Conjunctivitis can occur due to viruses, bacteria, and allergies. All types of pink eye cause the eyes to become red, watery, and itchy, but the other symptoms of pink eye will vary according to its cause.