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.
A papilloma (plural papillomas or papillomata) (papillo- + -oma) is a benign epithelial tumor growing exophytically (outwardly projecting) in nipple-like and often finger-like fronds.In this context papilla refers to the projection created by the tumor, not a tumor on an already existing papilla (such as the nipple).When used without context, it frequently refers to infections (squamous cell papilloma) caused by human papillomavirus (HPV), such as warts.Human papillomavirus infection is a major cause of cervical cancer, although most HPV infections do not cause cancer.There are, however, a number of other conditions that cause papilloma, as well as many cases in which there is no known cause.n this context papilla refers to the projection created by the tumor, not a tumor on an already existing papilla (such as the nipple). When used without context, it frequently refers to infections (squamous cell papilloma) caused by human papillomavirus (HPV), such as warts.