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.
Viral vs Bacterial Pink Eye. Both viruses and bacteria can cause pink eye. Conjunctivitis, uveitis, irits, elevated pressure in the eye, as well as sinusitis, can also cause pink eye. The commonest cause of pink eye is conjunctivitis.