Bicycle Valve Stem Types. There are three types of bicycle valve stems in use: Schrader, Presta and Woods/Dunlop. The Woods or Dunlop valve stem style is much more rare than the other two. Any wheel rim that fits a Schrader valve can also fit a Woods or Presta valve.
Papilloma and Papillomatosis. A papilloma is a benign growth found in breast ducts, which has âfinger-likeâ fronds, and often completely blocks the duct. Papillomas are composed of âmammary epitheliumâ which are the cells that comprise the duct-wall linings of the breast.
Visit the Pet Video Library. Today we're going to discuss warts, or papillomas, which is the medical term for warts. Papillomas are benign clusters of abnormal cells caused by the papilloma viruses, a group of DNA viruses that cause proliferative cauliflower-like skin and mouth lesions in dogs.