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.
The human papilloma virus (HPV) is the name given to a family of viruses. Different types of HPV are classed as either high risk or low risk, depending on the conditions they can cause. For instance, some types of HPV can cause warts or verrucas. Other types are associated with cervical cancer.