hepatic angiomyolipoma
Introduction
Introduction to hepatic angiomyolipoma Angiomyolipomaofliver (AML) is a benign liver tumor with adipose tissue. Typical includes three histological components of smooth muscle, blood vessels and mature fat cells, hence the name angiomyolipoma. basic knowledge The proportion of illness: the incidence rate is about 0.02% - 0.03% Susceptible people: no specific population Mode of infection: non-infectious Complications: abdominal pain
Cause
Causes of hepatic angiomyolipoma
(1) Causes of the disease
The etiology is very complicated and is determined by many factors. Hepatic angiomyolipoma is also the same as other benign tumors. Internal and external causes are important conditions for tumors.
(two) pathogenesis
Hepatic angiomyolipoma is a kind of benign liver tumor mainly composed of adipose tissue. The typical ones include smooth muscle, blood vessels and mature adipocytes. The angiomyolipoma is more common in the kidney, but rare in the liver. However, the two are closely related. Roberts et al reported 50 cases of renal angiomyolipoma and 5 cases of hepatic angiomyolipoma, suggesting hepatic angiomyolipoma in the group of renal angiomyolipoma. The incidence is relatively high.
Prevention
Hepatic angiomyolipoma prevention
Deepening the understanding of this disease has a certain guiding significance for the clinical treatment of liver tumors.
Complication
Hepatic angiomyolipoma complications Complications, abdominal pain
After the tumor is enlarged, it can show discomfort and pain in the upper right abdomen.
Symptom
Hepatic angiomyolipoma symptoms Common symptoms Abdominal tenderness Abdominal discomfort
Both men and women can have onset, the general medical history is long, there is no discomfort in the clinic, and the tumor can be enlarged and the upper right abdomen discomfort and pain can be expressed.
Hepatic angiomyolipoma mainly relies on CT, angiography and B-ultrasound for diagnosis.
Examine
Examination of hepatic angiomyolipoma
1.CT: Hepatic angiomyolipoma in the plain scan, the performance of a clear boundary, the edge of the incomplete heterogeneity of the lesion, in the low-density mass contains a lower density of CT value less than -30Hu, after strengthening There is no enhancement effect in the lower density area, and CT can also measure the size and location of the mass.
2. Hepatic angiography: One of the components of hepatic vascular smooth muscle lipoma is blood vessels. Therefore, hepatic angiography can be used to diagnose tumor blood vessels, and hepatic vascular smooth muscle lipoma is characterized by intrahepatic multivascularity during hepatic angiography. Space-occupying mass, tumor neovascularization, with or without arteriovenous shunt, tumor staining in the parenchymal phase, clear boundary, hepatic angiography of iodized oil, no iodine accumulation in the mass during embolization.
3. B-ultrasound: Under the B-ultrasound, the clear boundary, strong echo, low echo or mixed echo mass, the echo intensity in the mass is uneven, but according to the world literature, B-ultrasound has not been diagnosed for hepatic vascular smooth muscle lipoma. The main reason is that the disease is similar to other benign tumors in the liver, and ultrasound examination is not characteristic.
Diagnosis
Diagnosis and diagnosis of hepatic angiomyolipoma
diagnosis
1. Clinical manifestations.
2. Other auxiliary inspections.
Differential diagnosis
CT has a specific diagnostic value for hepatic angiomyolipoma, because the tumor with CT value less than -20Hu indicates the presence of adipose tissue. The normal liver parenchyma is uniform in CT scan, and the CT value is 40-70Hu. The CT value of most liver malignant tumors is slightly lower than that of normal liver tissue. At (35-50) Hu, the CT value of 0~20Hu in the mass indicates tumor degeneration and necrosis. The CT value of hepatic cyst is usually -5~ 10Hu range, therefore, the CT value of liver tumors less than -20Hu is more clearly suggesting the presence of adipose tissue, can support the tissue-specific diagnosis of hepatic vascular smooth muscle lipoma, and the diseases that need to be differentially diagnosed: focal Sexual liver fat infiltration, however, such lesions are usually unclear, marginal, and often located at the edge of the liver, and visible vascular shadows through it, so according to the above points can make a differential diagnosis.
