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Focal nodular hyperplasia's most recognizable gross feature is a central stellate scar seen in 60–70% of cases. Microscopically, a lobular proliferation of bland-appearing hepatocytes with a bile ductular proliferation and malformed vessels within the fibrous scar is the most common pattern.
Focal nodular hyperplasia (FNH) is the second most common benign tumor of the liver. [2] FNH is found in 0.2%– 0.3% of adults worldwide. [2] FNH is more common in females (10:1 female to male ratio) except in Japan and China, in which there is a more equal prevalence of cases between females and males. [2]
Within two years, there is a risk for cancer arising from these nodules of 30–40%. [44] Obesity and metabolic syndrome have emerged as an important risk factor, as they can lead to steatohepatitis. [30] [45] Diabetes increases the risk for HCC. [45] [39] Smoking increases the risk for HCC compared to non-smokers and previous smokers. [45]
Some authors feel that all hepatocellular adenoma should be resected, because of the risk of rupture causing bleeding and because they may contain malignant cells. [8] Current recommendations are that all hepatic adenomas should be resected, as long as they are surgically accessible and the patient is a reasonable operative candidate. [ 9 ]
Hepatic hemangiomas are the most common site for internal organ damage. Hepatic hemangiomas may be difficult to identify, because it can be inaccurately diagnosed as a hyper-vascular malignancy. These malignancies can live alongside other liver tumors such as hepatic cysts, hepatic angiosarcoma, focal nodular hyperplasia, and a myriad of others.
Hepatic adenomas may be misidentified as focal nodular hyperplasia in diagnostic imaging, though this condition is rare. However, hepatic adenomas in GSD I uniquely involve diffuse Mallory hyaline deposition, which is otherwise commonly observed in focal nodular hyperplasia. Unlike common hepatic adenomas related to oral contraception ...
Fibrolamellar carcinoma (FLC) is a rare form of carcinoma that typically affects young adults and is characterized, under the microscope, by laminated fibrous layers interspersed between the tumor cells. [1]
Nodular regenerative hyperplasia (NRH) is a rare liver disease, characterised by the growth of nodules within the liver, resulting in liver hyperplasia.While in many cases it is asymptomatic and thus goes undetected – or is only discovered incidentally while investigating some other medical condition – in some people it results in non-cirrhotic portal hypertension (NCPH).