胃底折叠术，裂孔疝修复和Heller术 34mb

Laparoscopic Takedown Of Nissen Fundoplication, Hiatal Hernia Repair And Heller Myotomy With


A cyst is a closed sac, having a distinct membrane and division[clarification needed] compared to the nearby tissue. It may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, a cyst may sometimes resolve on its own. Whether a cyst that fails to resolve may need to be removed by surgery will depend on what type of cyst it is and where in the body it has formed.
Acne vulgaris (or simply acne) is a common human skin disease, characterized by areas of skin with seborrhea (scaly red skin), comedones (blackheads and whiteheads), papules (pinheads), nodules (large papules), pimples, and possibly scarring. Acne affects mostly skin with the densest population of sebaceous follicles; these areas include the face, the upper part of the chest, and the back Severe acne is inflammatory, but acne can also manifest in noninflammatory forms.