We'd like to understand how you use our websites in order to improve them. Register your interest. In order to evaluate the validity of an urine spot test for the early diagnosis of retinoblastoma, the urine of 10 patients with this disease was examined. The test is based on the increased excretion of vanilmandelic acid and homovanillic acid in cases of retinoblastoma and neuroblastoma and proved to be usefull in the diagnosis of neuroblastoma. No positive results were obtained in our series of retinoblastoma.

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Giant preaortic paraganglioma. Descritores: Paraganglioma. Generally, paraganglioma produces catecholamines causing adrenergic syndrome. However, more rarely when tumor is nonfunctioning, their symptoms are more associated with an abdominal mass or even pain.

In these circumstances, paraganglioma present a difficult diagnosis confounding with retroperitoneal sarcomas. This patient had low levels of catecholamines both seric and urinary. The preoperative diagnosis was done by means computed tomography. This lesion presented as well-vascularized tumor with calcifications and necrotic central area. The patient underwent a surgical resection with good postoperative outcome. To date, one year after surgical treatment, the patient is alive without recurrence.

Treatment is surgical resection and presents a good prognosis. Headings: Paraganglioma. Diagnostic imaging. Assim sendo esse tumor foi classificado como benigno. Conforme observado no presente caso e de acordo com Pui et al. Segundo Piu et al. Pheochromocytoma: A twenty-year experience at the University Hospital.

PR Health Sci J ; Bladder pheochromocytoma with ring calcification. Abdom Imaging ; Adrenal Tumors. The M. Anderson Surgical Oncology Handbook. Extraadrenal retroperitoneal paraganglioma: Clinical, pathologic, and CT findings. AJR ; Nonchromaffin paraganglioma of the retroperitoneum. J Urol ; Primary retroperitoneal neoplasms: CT findings in 90 cases with clinical and pathologic correlation.

Malignant paragangliomas of the retroperitoneum: Value of computed tomography and angiography. Clin Radiol ; Computed Tomography of retroperitoneal paragangliomas. Australasian Radiology ; Diagnosis and evaluation of retroperitoneal tumors by computed tomography.

Pheochromocytoma: Value of computed tomography. Radiology ; Sergio Renato Pais Costa e-mail sergiorenatopais ig. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Services on Demand Journal. How to cite this article.


Ácido homovanílico

The catecholamine content of aqueous humour was significantly higher than that of urine and serum, but as there was no significant difference in the HMMA concentration in retinoblastoma and other non-malignant conditions it seems likely that retinoblastoma is not a catecholamine-secreting tumour. National Center for Biotechnology Information , U. Journal List Br J Ophthalmol v. Br J Ophthalmol. Dias and A.


Ácido vanilmandélico

Medwave se preocupa por su privacidad y la seguridad de sus datos personales. Ello impresiona por relacionarse con feocromocitoma de suprarrenal derecha. Figura 1. Estas situaciones no se reportan en la paciente. En su defecto puede realizarse con I-metayodobencilguanidina.

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