Search results for "Hemangioma"
showing 10 items of 101 documents
Giant area of transient hepatic attenuation difference, mimicking incidentaloma at liver ultrasound.
2010
Concurrent with recent advances in diagnostic imaging techniques, the incidental finding of liver tumors, or incidentalomas, is increasing in asymptomatic and healthy individuals [1]. A 56-year-old healthy man underwent an abdomen ultrasound for a clinical check-up. A diffuse bright liver echo-pattern (indicating a low-moderate grade steatosis) and an unusual image (diameter approximately 10 cm) in the VI–VII hepatic segment, characterized by a massive giant hypoechoic lesion with poorly defined margins and a near rounded hyperechoic area (diameter about 4 cm) in the context were found (Fig. 1). The ultrasonographer suspected an angioma as first diagnostic hypothesis; however the large hypo…
Effect of observer experience in the differentiation between benign and malignant liver tumors after ultrasound contrast agent injection.
2009
OBJECTIVE: The purpose of this study was to assess the impact of the observer level of experience on the diagnostic performance of contrast-enhanced ultrasound imaging (CEUS) for differentiation between benign and malignant liver tumors. METHODS: From a computerized search, we retrospectively identified 286 biopsy-proven liver tumors (105 hepatocellular carcinomas, 48 metastases, 7 intra-hepatic cholangiocarcinomas, 33 liver hemangiomas, and 93 nonhemangiomatous benign lesions) in 235 patients (140 male and 95 female; mean age +/- SD, 56 +/- 11 years) who underwent CEUS after sulfur hexafluoride-filled microbubble injection. The digital cine clips recorded during the arterial (10-35 seconds…
Benign focal liver lesions: spectrum of findings on SonoVue-enhanced pulse-inversion ultrasonography.
2005
The prevalence of benign focal liver lesions (BFLL) is high both in the general population and in patients with known malignancies. The gray-scale ultrasound (US) technique is usually the first-line imaging modality used in the radiological workup of such lesions, but unfortunately it lacks specificity. Furthermore, Doppler examination may often be unsatisfactory owing to motion artefacts, or when small or deeply located lesions are evaluated. Recently, microbubble-based contrast agents used in combination with gray-scale US techniques, which are very sensitive to nonlinear behavior of microbubbles, have led to a better depiction of both microvasculature and macrovasculature of focal hepati…
Chromatic-achromatic perimetry in four clinic cases: Glaucoma and diabetes
2015
Color perimetry has interesting clinical application for the diagnosis and detection of certain eye conditions, due to the variations that certain diseases can cause in chromatic thresholds, both in the red-green (RG) and the blue-yellow (BY) pathways.[1,2,3,4] The separate study of the visual function of both the chromatic and achromatic mechanisms could be more efficient in detecting sensitivity variations, and such variations would not be obscured by the intrusion of other mechanisms. Currently, the supply of conventional perimeters that are capable of performing a chromatic perimetry test is very limited and with reduced options regarding the possibility of choosing the physical charact…
Conservative parotidectomy in infancy and childhood
1975
Summary The indication for operations of benign tumours of the salivary glands in infancy and childhood is taken with great caution and is only partially recommended as the therapy of choice. This applies especially to hemangiomas, since spontaneous retrogression has been observed and there is the danger of damage to the facial nerve during surgery. Knowing unsatisfactory late cases of hemangiomas the author recommends conservative parotidectomy in cases of fast-growing hemangiomas. The anatomic structures in infancy, as well as the lack of pneumatisation of the mastoid process and the fragility of the cartilagineous auditory meatus should be taken into consideration during surgical explora…
Study of smartphone suitability for mapping of skin chromophores.
2015
RGB (red-green-blue) technique for mapping skin chromophores by smartphones is proposed and studied. Three smartphones of different manufacturers were tested on skin phantoms and in vivo on benign skin lesions using a specially designed light source for illumination. Hemoglobin and melanin indices obtained by these smartphones showed differences in both tests. In vitro tests showed an increment of hemoglobin and melanin indices with the concentration of chromophores in phantoms. In vivo tests indicated higher hemoglobin index in hemangiomas than in nevi and healthy skin, and nevi showed higher melanin index compared to the healthy skin. Smartphones that allow switching off the automatic cam…
Angioma retiniano como síndrome mascarada de tumor del nervio óptico en la enfermedad de Von Hippel-Lindau
2006
espanolCaso clinico: Varon de 35 anos con antecedentes familiares de enfermedad de von Hippel-Lindau (VHL) diagnosticado de dos hemangiomas retinianos en ojo derecho (OD) y uno en ojo izquierdo. Las lesiones se trataron con crioterapia en OD y laserterapia en OI. A pesar de una aparente buena evolucion de las lesiones retinianas hubo una progresiva disminucion de la AV. Se realizo RM donde se evidencio lesiones tumorales del nervio optico (NO) bilaterales compatibles con glioma, meningioma o hemangioblastoma. Actualmente: AV (OD): movimiento de manos y AV(OI): 0,6. Discusion: La presencia de los hemangiomas retinianos en este paciente hizo retrasar el diagnostico de un tumor en el NO, infre…
Intraoral epithelioid hemangioendothelioma: a case report and review of the literature.
2009
The epithelioid hemangioendothelioma (EH) is an uncommon angiocentric neoplasm of borderline or intermediate malignant potential, between the hemangioma and conventional angiosarcoma. It is characterized by the proliferation of endothelial cells with epithelioid or histiocitóide morphology with vacuolated cytoplasm and occasional eosinophilic spindle cells. Shows potential for local recurrence as well as the ability to metastasize. Rarely affects the oral cavity, it have been described from 1975 until 2008 only 27 oral cases. Morphologically the EHs may be confused with other lesions, from a hemangioma to a squamous cell carcinoma, and thus immunohistochemical analysis is required. This pap…
Oral encapsulated vascular malformation: an undescribed presentation in the mouth
2016
Vascular lesions have been classified in two broad categories, hemangiomas and malformations. Encapsulated vascular lesions have not been reported in the oral cavity, but they were described in other sites, mainly in the orbit. Herein, we present a case of an oral encapsulated vascular lesion located in the right buccal mucosa of a 69-year-old male, including histological and immunohistochemical description and a literature review. Key words:Buccal mucosa, hemangioma, vascular malformation, oral cavity.
Acquired elastotic hemangioma-like changes and eccrine sweat duct squamous metaplasia in lichen simplex chronicus/prurigo nodularis-like lesions of t…
2017
Background The so-called acquired elastotic hemangioma (AEH) represents a peculiar vascular lesion affecting the sun-damaged skin of the extensor surface of the forearms or the lateral aspect of the neck of middle-aged or elderly women. Methods This is a clinicopathological and immunohistochemical study of a series of 6 lesions located on the knee or elbow showing epithelial features of lichen simplex chronicus (LSC)/prurigo nodularis (PN) with a marked subepidermal vascular proliferation closely resembling AEH. Results Microscopically, all cases of cutaneous lesions showed epithelial features of LSC/PN, that is compact hyperkeratosis with focal parakeratosis, irregular acanthosis, prominen…