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.
Dog warts -- also called viral papillomas or fibropapillomas -- are benign skin tumors caused by a virus. While dog warts are usually not dangerous, it is important to reach a correct diagnosis with your veterinarian as what may look like a wart could actually be a more serious skin condition. In addition, some warts cause pain and/or become infected, requiring treatment.