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.
Follow On: Dogs are often able to develop a disease known as canine oral papilloma, also known as oral warts. Papillomas are small tumors that are caused by a virus, but they are almost always benign. In puppies, the oral papilloma virus shows up as small patches of what look like cauliflower.