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.
Breast papillomas are a variety of lesions in the breast that are characterized by a papillary configuration on gross or microscopic examination (or both). Papillomas consist of a few broad fronds, abundant stroma, and an epithelium containing both luminal and myoepithelial cells [1].