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.
Finally, not all cases of pink eye are caused by conjunctivitis. Sometimes more serious conditions, such as infections, damage to the cornea, very severe glaucoma, or inflammation inside the eye will cause the conjunctiva to become inflamed and pink.