define focal lesion of liver
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- Lesions are a common occurrence in the liver, and the prognoses of focal liver lesions vary. The term lesion is broad and includes any wound, sore, ulcer, tumor or other tissue damage of an organ. A focal lesion in the liver refers to one area of tissue damage identified on the liver that has varying significance depending on the patient's health condition and a variety of other factors.
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Benign Liver Tumors A tumor is an abnormal growth of cells or tissues. Some tumors are malignant, or cancerous. Others are benign, or noncancerous. Cancerous liver tumors can be fatal. Most of the time, cancerous tumors in the liver started in another organ and spread to the liver. This form of liver cancer is called metastatic liver cancer.
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hyperplasia focal nodular hyperplasia (FNH) a benign, usually asymptomatic tumor of the liver, occurring chiefly in women; it is a firm, nodular, highly vascular mass resembling cirrhosis, usually with a stellate fibrous core containing numerous small bile ducts, and having vessels lined by Kupffer cells.
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What Is a Hyperechoic Lesion in the Liver? Other benign conditions that may be the result of a hyperechoic liver lesion include a hepatic adenoma, focal fatty change, and an inflammatory pseudotumor of the liver, according to Radiopaedia.org.
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- Cystic lesions of the liver represent a heterogeneous group of disorders, which differ in etiology, prevalence, and clinical manifestations . Most liver cysts are found incidentally on imaging studies and tend to have a benign course. A minority can cause symptoms and rarely may be associated with serious morbidity and mortality .
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What Are Liver Lesions? Liver lesions are groups of abnormal cells in your liver. Your doctor may call them a mass or a tumor. Noncancerous, or benign, liver lesions are common. They don’t spread to other areas of your body and don’t usually cause any health issues. But some liver lesions form as a result of cancer. Who Gets Them? Anyone can have a liver lesion, but some things can make you more likely to have cancerous ones:
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Definition of Focal Consolidation Medical Definition. Focal consolidation is the replacement of gas within air spaces by fluid, protein, cells, or other material in a single spot on the lungs. It means that the lungs are not operating at full capacity because the spaces that should be full of air are full of another substance. What Focal Consolidation Looks Like
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- Focal lesions beyond hepatocellular carcinoma in cirrhotic liver. A wide spectrum of benign and malignant lesions other than HCC. may be encountered in the cirrhotic liver. Familiarity with the imag-. ing findings of these lesions may be helpful for radiologists for precise. diagnosis and appropriate management.
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Non-Cancerous Liver Lesions Diagnosis and Treatment Hemangiomas are the most common of all benign liver masses. They are more prevalent in women and may be affected by hormonal changes. Symptoms such as pain are mostly noted in lesions less than 6 cm and are related to compression of adjacent structures.
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The Scintigraphic Evaluation of Focal Nodular Hyperplasia with Tc-99m Sulfur Colloid Imaging Findings. A Tc-99m sulfur colloid exam (anterior planar image and SPECT images) demonstrated uptake in this lesion that was of a higher intensity than the rest of the liver (arrow on planar and on SPECT images). This finding proved that the lesion was benign, most likely focal nodular hyperplasia.
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- Hepatic Mass: What are the common liver masses? Malignant liver tumors Metastatic tumors Hepatocellular carcinoma Cholangiocarcinoma; Benign focal liver lesions Cysts congenital parasitic - echinococcal; Cavernous hemangiomas Focal nodular hyperplasia Hepatic adenomas Abscesses; What are the useful imaging modalities to investigate liver masses? CT Ultrasound MRI; Utility of each procedure - Indicate when you would select each procedure. CT scan Is the best imaging modality to evaluate liver masses. It can identify other intra-abdominal masses and vascular involvement, i.e., thrombosis, etc. CT angiography shows early enhancement of tumor in arterial phase. Ultrasound Is most useful intra-operatively, during which the transducer is placed directly upon the liver surface to recognize liver lesions.
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- Both must be considered. I. The Nature of Focal Infection. Billings gave the first definition of a focus of infection: A focus of infection may be described as a circumscribed. area of tissue infected with pathogenic organisms. Foci. may be primary or secondary. Primary foci usually are. located in tissues communicating with a mucous or. cutaneous surface.
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- “Lesion” is a general word for a tissue abnormality. Liver lesion is a term doctors use for abnormal areas noted on an imaging test of the liver. Most often, liver lesions are seen on an ultrasound, computed tomogram (CT) scan, or magnetic resonance imaging (MRI) scan. The term “liver lesion” is a general term. Liver lesions could be anything from harmless cysts in the liver, to areas of cancer spreading from the colon or breast. The appearance of the lesions on imaging, as well as other diagnoses and test results, can often help explain the cause of liver lesions.
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Liver Lesions FoundBenson Dec 22, 2003 There are many causes for liver lesions. They can include malignant causes such as cancer, or benign causes like cysts, hepatic adenomas, hemangiomas, focal nodular hyperplasia, or infectious causes. As for the frequency, it will depend on what kind of liver lesion is in question.
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- Tweet. Liver lesions is a term that can be applied to any of various abnormalities of the liver, including those produced by serious conditions such as liver cancer or cirrhosis but much more commonly those that result from more benign conditions such as cysts or liver hemangioma.
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The Hypointense Liver Lesion on T2-Weighted MR Images and What It Means Figure 28c Angiomyolipoma in a 66-year-old man. (a–c) The lesion (arrow) is (a) hypointense on T2-weighted FSE image (1800/93) and (b) hyperintense as subcutaneous fat on in-phase T1-weighted image (100/5.2).a, b) A small nodule in the right liver lobe (arrow) is (a) hypointense on T2-weighted (1800/93) image and (b) hyperintense on T1-weighted (100/5.2) image. The low SI of the dysplastic nodule on the T2-weighted image may be related to deposition of paramagnetic substances such as iron.
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- 1. Describe hyaline cartilage location and function. (Don’t forget, click on the red captions to access additional information.) Use this interactive diagram to review histological structure, too. Hyaline cartilage is found as the articular cartilage within a synovial joint.
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Liver - Masses II - Common Tumors The lesion on the left has the folowing characteristics: 1  The lesion is hypodens in the arterial and portal venous phase with some peripheral enhancement. 2  The lesion is hyperdense in the equilibrium phase indicating dens fibrous tissue. 3  The lesion causes retraction of the liver capsule.
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Imaging the Liver A) Unenhanced CT demonstrates a large irregular lesion in the right lobe of the liver. Chemical shift imaging with MRI obtained B) in phase and C) out of phase confirms that the lesion is focal fatty infiltration.
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MayoClinic Health Library It may be unsettling to know you have a mass in your liver, even if it's a benign mass. There's no evidence that an untreated liver hemangioma can lead to liver cancer. A liver hemangioma is a noncancerous (benign) mass that can occur in the liver. A liver hemangioma is made up of a tangle of blood vessels. Liver hemangioma is sometimes called hepatic hemangioma or cavernous hemangioma. Most cases of liver hemangioma are discovered during a test or procedure for some other condition.
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Liver Metastases Imaging Technically, MRI is as sensitive as CT in the detection of liver metastases. The use of ultrafast techniques has certainly increased the sensitivity of MRI, although it is still inferior to CTAP. In a number of settings, MRI is superior to other imaging techniques.
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Non-Cancerous Liver Lesions Diagnosis and Treatment No specific treatment is required for asymptomatic lesions whatever the size. Surgical resection is the treatment of choice for symptomatic lesions. Focal Nodular Hyperplasia (FNH) is the second most common benign lesion of the liver. It is usually asymptomatic and has no malignant potential or risk of rupture. Symptomatic lesions are usually larger and cause compression of adjacent structures.
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Prevalence and Importance of Small Hepatic Lesions Found at CT in Patients with Cancer Jones et al (1) reported the presence of liver lesions smaller than 15 mm in 17% of 1,454 outpatients at abdominal CT; the small hepatic lesions were deemed benign in 51% of the 82% of patients with a known underlying malignancy.
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The Hypointense Liver Lesion on T2-Weighted MR Images and What It Means Figure 9a Dysplastic nodule in a 61-year-old man with alcoholic cirrhosis. (a, b) A small nodule in the right liver lobe (arrow) is (a) hypointense on T2-weighted (1800/93) image and (b) hyperintense on T1-weighted (100/5.2) image.The low SI of the dysplastic nodule on the T2-weighted image may be related to deposition of paramagnetic substances such as iron.etastatic melanoma to the liver has variable imaging features that depend on the melanin content of metastases, which causes different hyperintense/hypointense patterns on T1- and T2-weighted images (32).
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Prevalence and Importance of Small Hepatic Lesions Found at CT in Patients with Cancer The most common site of extrahepatic metastasis in patients with small hepatic lesions of any cause was the lymph nodes; small hepatic lesions were benign in 43 (81%) of 53 patients with lymph node involvement and malignant in seven (13%) (Table 2).
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Metastatic Liver Lesions Diagnosis and Treatment Treatment Options for Metastatic Liver Lesions. Once a metastatic liver lesion is detected, patients should undergo a rapid medical, oncologic and surgical evaluation to determine the most appropriate treatment. The treatment may vary between patients, and will be tailored to best fit each individual's specific needs.