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.
Most are a cyst or papilloma. â¢A cyst is caused by a gland which has become blocked but continues to produce fluid or oil. This collects under the skin as a spherical lump. â¢A papilloma is a warty fleshy growth of skin, also known as a skin tag. They are benign and not a form of skin cancer.