GASTROENTEROLOGY

Hepatocellular Carcinoma

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Hepatocellular Carcinoma

Fig. 7.1 Aberrant arteriole in tumor. Aberrant small arteries in the lobules are useful features that support a diagnosis of neoplasm. However, this feature is not specific for tumors and…

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Pseudotumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Pseudotumors

Fig. 1.1 Accessory hepatic lobe. The accessory lobe is attached to the liver by a pedicle of fibrovascular tissue Accessory lobes can measure up to 19 cm [2]. They can…

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Cholangiocarcinoma

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Cholangiocarcinoma

Risk factors for intrahepatic cholangiocarcinoma Viral hepatitis (B and C) Fibrocystic diseases • Autosomal dominant polycystic kidney and liver disease • Choledochal cyst • Caroli’s disease • Congenital hepatic fibrosis…

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Malignant Mesenchymal Tumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Malignant Mesenchymal Tumors

Fig. 11.1 Epithelioid hemangioendothelioma, gross. A liver explant showing multiple tumor nodules ranging from a few millimeters to several centimeters 11.1.4 Microscopic Findings Microscopically, epithelioid hemangioendothelioma is characterized by individual…

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Hematolymphoid Lesions

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Hematolymphoid Lesions

Fig. 12.1 The hemophagocytic syndrome. The sinusoids show prominent benign histiocytes containing phagocytized erythrocytes 12.2 B-Cell Lymphomas 12.2.1 Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma and Mantle Cell Lymphoma 12.2.1.1 Definition Chronic…

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Malignant Pediatric Liver Tumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Malignant Pediatric Liver Tumors

Epithelial tumors  Hepatocellular:   Hepatoblastoma    Epithelial     Pure fetal with low mitotic activity     Fetal, mitotically active     Pleomorphic, poorly differentiated     Embryonal     Small cell undifferentiated      INI-1 negative      INI-1 positive     Mixed epithelial (any or all…

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Cholangiocarcinoma Precancerous Lesions

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Cholangiocarcinoma Precancerous Lesions

Fig. 9.1 Mucinous cystic neoplasm. This cross-section shows a multilocular cyst filled with thin watery fluid Fig. 9.2 Mucinous cystic neoplasm. This mucinous cystic neoplasm shows a multilocular cyst with…

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Benign Biliary Tumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Benign Biliary Tumors

Fig. 5.1 Ciliated hepatic foregut cyst. The wall of ciliated hepatic foregut cyst has four layers: ciliated epithelium, subepithelial connective tissue, smooth muscle, and fibrous stroma Fig. 5.2 Ciliated hepatic…

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Benign Pediatric Liver Tumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Benign Pediatric Liver Tumors

  Focal Multifocal Diffuse Symptoms Most are asymptomatic Depends on size and number of tumors, with smaller tumors often being asymptomatic. Larger lesions can have high-output cardiac failure Common, including,…

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Benign Vascular Tumors

Oct 6, 2016 by in GASTROENTEROLOGY Comments Off on Benign Vascular Tumors

Finding Cavernous hemangioma Infantile hemangioma Anastomosing hemangioma Capillary hemangioma Predominant vessel size Large Intermediate to small Small Small Anastomosing channels − −/+ + − Hobnail endothelial cells − − +…

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