1/119. Renal cell carcinoma with a fatty component mimicking angiomyolipoma on CT.A very unusual CT appearance of renal cel carcinoma is presented, in which the fatty density mimicked a benign angiomyolipoma.- - - - - - - - - - ranking = 1keywords = fat (Clic here for more details about this article) |
2/119. Renal angiomyolipoma resembling gastrointestinal stromal tumor with skenoid fibers.We report an unusual case of renal angiomyolipoma occurring in 68-year-old man. The tumor lacked well-developed vascular and adipose components and was composed almost exclusively of smooth muscle cells. Numerous skenoid-like periodic acid-Schiff-positive globules were interspersed between the tumor cells; the lesion therefore closely resembled a low-grade stromal tumor of the gastrointestinal tract. The HMB45-positive/CD34-negative immunophenotype was essential for the diagnosis of angiomyolipoma. Neither gastrointestinal tumor nor any signs of tuberous sclerosis were found. This lesion should be included in the list of morphologic variations of angiomyolipoma, which may cause diagnostic difficulties.- - - - - - - - - - ranking = 5.9489957483624keywords = adipose (Clic here for more details about this article) |
3/119. angiomyolipoma of the parotid gland: a case report.angiomyolipoma is a hamartomatous process that most frequently occurs as a single lesion or multiple foci in the kidneys of patients affected by tuberous sclerosis. angiomyolipoma can also arise in extrarenal sites, among which the liver is the most frequently recorded. Only rare cases of angiomyolipoma located in the head and neck region (ear and oral and nasal cavity) have been described. The purpose of the present article is to report a case of angiomyolipoma of the parotid gland. A 68-year-old woman appeared for treatment with a slow-growing nodule located in her right parotid gland. Ultrasound examination revealed a heterogeneous nodule with well-defined margins. The nodule was surgically removed by total parotidectomy and showed the characteristic appearance of angiomyolipoma, with an admixture of fat smooth muscle cells, and tortuous, thick-walled blood vessels. Careful physical examination of the patient failed to reveal features of tuberous sclerosis. angiomyolipoma should be considered in the differential diagnosis of mesenchymal lesions involving the salivary gland.- - - - - - - - - - ranking = 0.2keywords = fat (Clic here for more details about this article) |
4/119. angiomyolipoma of the liver--a case report and review of 48 cases reported in japan.Hepatic angiomyolipoma was considered to be a rare benign tumor, but the number of cases has been increasing recently as imaging techniques improve. We describe a case of hepatic angiomyolipoma for which a definitive diagnosis could not be made on imagings and in which resection was performed. The patient had anti-HCV antibody and slight dysfunction of the liver. The tumor showed a heterogeneous high echo on ultrasonography and a low attenuation value of 32.6 Housfield Units, which was much higher than fat density, on plain computed tomography. Discrimination from hepatocellular carcinoma with fatty change was difficult preoperatively. Microscopically, the tumor consisted of spindle-shaped and epithelioid smooth muscles, adipose tissues and proliferating blood vessels and these histological findings confirmed the diagnosis of hepatic angiomyolipoma. The appearance of hepatic angiomyolipoma on imaging diagnosis varies widely due to the fact that the relative proportion of vessels, muscles and fats varies widely from tumor to tumor. The tumor in our case had relatively few fat components. We review 48 cases reported in japan and discuss imaging diagnosis and surgical indications for tumors.- - - - - - - - - - ranking = 6.7489957483624keywords = adipose, fat (Clic here for more details about this article) |
5/119. Mucocutaneous angiomyolipoma. A report of 2 cases arising in the nasal cavity.OBJECTIVE: angiomyolipoma (AML) is a distinctive tumor that usually occurs in the kidney and rarely in the liver. angiomyolipoma of other sites is extremely rare, and, to our knowledge, only 2 cases have been described in the nasal cavity. We present 2 additional cases of AML of the nasal cavity and discuss the difference between them and renal AML. case reports AND PATHOLOGIC FINDINGS: Two tumors in a 66-year-old man and an 88-year-old woman without tuberous sclerosis are described. They showed 20-mm, well-circumscribed, polypoid shapes. Histologically, they were composed of mature smooth muscle cells, fat cells, and various-sized blood vessels. In addition, aggregated small lymphocytes were noted. Neither epithelioid smooth muscle cells nor HMB45 immunoreactivity was seen in either case. CONCLUSIONS: The clinicopathologic features of AML of the nasal cavity are distinct from renal and hepatic AML and are common to those of AML arising in the skin and oral and pharyngeal mucosa. The term mucocutaneous angiomyolipoma is thought to be appropriate to express these characteristic tumors.- - - - - - - - - - ranking = 0.2keywords = fat (Clic here for more details about this article) |
6/119. Paratesticular liposarcoma with smooth muscle differentiation mimicking angiomyolipoma.AIMS: To discuss the differential diagnosis of a case of well-differentiated liposarcoma which had areas resembling angiomyolipoma-a feature which, to our knowledge, has not been reported previously. methods AND RESULTS: A tumour in the paratesticular region had apparently been present for 40 years, but had grown recently. A fat component containing lipoblasts was admixed with areas resembling angiomyolipoma, i.e. desmin positive, but HMB45-negative smooth muscle proliferation with atypia and thick-walled blood vessels devoid of elastin. CONCLUSION: The diagnosis of liposarcoma, rather than angiomyolipoma with adipose atypia, in this case is based on the fact that smooth muscle differentiation is documented in liposarcoma, lack of HMB45 staining and recent clonality studies which suggest that the fat in angiomyolipoma is not neoplastic.- - - - - - - - - - ranking = 6.3489957483624keywords = adipose, fat (Clic here for more details about this article) |
7/119. angiomyolipoma of the renal sinus: diagnosis by percutaneous biopsy.We report a case of angiomyolipoma of the renal sinus discovered incidentally during an evaluation for microscopic hematuria. diagnosis was confirmed by percutaneous aspiration biopsy performed with magnetic resonance imaging control allowing differentiation of this entity from other fatty tumors of the renal sinus including liposarcoma, lipoma, and sinus lipomatosis.- - - - - - - - - - ranking = 0.2keywords = fat (Clic here for more details about this article) |
8/119. angiomyolipoma mimicking true lipoma of the liver: report of two cases.Hepatic angiomyolipoma (AML) is very rare and only about 80 cases have been reported. The tumor is fundamentally heterogeneously composed of the three tissue components of blood vessels, smooth muscle cells (SMC), and fat cells. Two cases of hepatic AML are reported here, both of which are histologically composed predominantly of a fat cell element and resembled true lipoma (lipomatous AML). However, careful examination of both tumors revealed the presence of a small amount of epithelioid SMC, especially around blood vessels. Immunohistochemical study using monoclonal antibody for melanoma (HMB-45) clearly revealed a small amount of HMB-45-positive SMC around the blood vessels and scattered in the diffuse fat cell growth in both tumors. Since no liver tissue components or primary liver tumors are reactive with HMB-45 except AML cells, the presence of HMB-45-positive cells within the tumor clearly established the diagnosis of hepatic AML. Any fatty tumor or focal fatty lesion of the liver that superficially resemble true lipomas should be tested for the presence of HMB-45-positive SMC in the tumor to differentiate it from AML.- - - - - - - - - - ranking = 1keywords = fat (Clic here for more details about this article) |
9/119. Traumatic rupture of angiomyolipoma: a case report.OBJECTIVE: To describe a case of traumatic rupture of renal angiomyolipoma (AML). methods: The images and clinical data of the present case are presented. RESULTS: A rare case with exuberant clinical presentation of a perirenal hematoma resulting from traumatic rupture of renal AML is presented with a brief review of the role of ultrasound (US) and body-CT in the diagnosis of this pathology and its complications. CONCLUSIONS: Whenever there is a collection detected by US in the various anatomic renal spaces, in a patient with flank pain and low hemoglobin shortly after abdominal trauma, it is advisable to perform abdominal CT and search for a hematoma. Small amounts of fat, detected by US and body-CT, may lead to the diagnosis of an underlying AML that can rupture, even in the case minor forces are applied to the kidney.- - - - - - - - - - ranking = 0.2keywords = fat (Clic here for more details about this article) |
10/119. Various radiological appearances of angiomyolipomas in the same kidney.A 21-year-old woman with tuberous sclerosis presented with abdominal distension and flank pain. Imaging studies, including CT and MR imaging, revealed bilateral renal mass lesions, containing fat and suggesting the diagnosis of tuberous sclerosis. However the imaging characteristics of one of these lesions differed from the others with no radiologically detectable fat tissue in this solid lesion suggesting renal cell carcinoma. Histopathological examination of this lesion in the left kidney revealed an angiomyolipoma within minimal fat tissue. The radiological diagnosis of angiomyolipomas with minimal fat tissue remains difficult and the differential diagnosis is discussed.- - - - - - - - - - ranking = 0.8keywords = fat (Clic here for more details about this article) |
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