Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 32. Chapters: Arteriovenous malformation, Cyst, Aneurysm, Cardiac fibrosis, Pseudocyst, Colorectal polyp, Limb infarction, Parotitis, Atrophy, Muscle atrophy, Sialoendoscopy, Adenoid hypertrophy, Laryngotracheal stenosis, Carbuncle, Ventriculomegaly, Arthrofibrosis, Pseudoaneurysm, Hematoma, Cariogram, Cerebral atrophy, Ghon's complex, Perianal hematoma, Gross examination, Charcot-Bouchard aneurysm, Seroma, Hydrocele, Bowel infarction, Zahn infarct, Right ventricular hypertrophy, Tophus, Urachal cyst, Anemic infarct, Sequestrum, Serositis, Watershed stroke, Subglottic stenosis, Stenosing tenosynovitis, Hyaloserositis, Syringobulbia, Caries, Dissection, Stercoral perforation, Hemorrhagic infarct, Cirsoid aneurysm, Cystic, mucinous, and serous neoplasms, Hyperostosis, Diastasis, Pedunculated. Excerpt: An aneurysm or aneurism (from Ancient Greek: - aneurusma "dilatation," from - aneurunein "to dilate") is a localized, blood-filled balloon-like bulge in the wall of a blood vessel. Aneurysms can commonly occur in arteries at the base of the brain (the circle of Willis) and an aortic aneurysm occurs in the main artery carrying blood from the left ventricle of the heart. When the size of an aneurysm increases, there is a significant risk of rupture, resulting in severe hemorrhage, other complications or death. Aneurysms can be hereditary or caused by disease, both of which cause the wall of the blood vessel to weaken. A true aneurysm is one that involves all three layers of the wall of an artery (intima, media and adventitia). True aneurysms include atherosclerotic, syphilitic, and congenital aneurysms, as well as ventricular aneurysms that follow transmural myocardial infarctions (aneurysms that involve all layers of the attenuated wall of the heart are also considered true aneurysms). A false aneurysm or pseudoaneurysm does...