Lipoma intracraniano ? Revisão da literatura / Intracranial lipoma ? Review of literature

Lipomas intracranianos são considerados malformações congênitas, resultantes da persistência da meninge primitiva mesenquimal e de sua posterior diferenciação em tecido adiposo. Correspondem entre 0,06% e 0,1% de todos os tumores intracranianos. Exame de neuroimagem tem sido útil no seu diagnóstico em pacientes assintomáticos. Geralmente, encontra-se associado a outras anomalias congênitas como agenesia do corpo caloso ou representa achado ocasional relacionado a outras manifestações clínicas não correlatas. Tratamento cirúrgico não é recomendado por causa da elevada taxa de complicações e pelo curso benigno dessa lesão. Este trabalho teve como delineamento uma revisão bibliográfica nas bases de dados online Cochrane, PubMed/MedLine, Lilacs e SciELO, para artigos publicados entre os anos de 1974 e 2010. Os descritores utilizados foram: ?lipoma cerebral? e ?lipoma intracraniano?, combinados com ?tumor cerebral? e ?tratamento?. Foram identificados 94 artigos, dos quais, após a leitura na íntegra e análise pelos autores, foram selecionados 75 artigos para este estudo. Os lipomas intracranianos resultam da persistência e diferenciação anômala da meninge primitiva em tecido adiposo. No exame tomográfico, apresenta-se como lesão marcadamente hipoatenuante, sem realce significativo pelo contraste endovenoso, não apresentando edema perilesional. A ressonância magnética tem sido o exame de eleição para o seu diagnóstico. Quando decorrente de achado incidental e assintomático, seu tratamento é conservador. Lipoma intracraniano é uma malformação rara resultante de alterações do desenvolvimento e encontra-se frequentemente associado a disrafismos. Geralmente é assintomático ou um achado incidental de exame de imagem. Os avanços nos métodos de diagnóstico por imagem aumentaram a probabilidade de essa malformação ser diagnosticada, mesmo que assintomática. Seu tratamento é conservador em casos assintomáticos ou de achado incidental...

Intracranial lipomas are considered to be congenital malformations, originated from primitive mesenchymal meninge persistence and later differentiation into fatty tissue. They represent 0.06% to 0.1% of all intracranial tumors. Neuroimaging is useful for diagnosing symptomatic patients. The lesion is often associated with other congenital anomalies such as agenesis of the corpus callosum, however it may be found incidentally with atypical clinical manifestations. Surgical treatment is not recommended due to high complication rates and to the condition?s benign course. The present paper reviews the literature through the online databases Cochrane, PubMed/MedLine, Lilacs and SciELO. The reviewed articles were published from 1974 to 2010; descriptors included ?cerebral lipoma? and ?intracranial lipoma? associated to ?brain tumor? and/or ?treatment?. Intracranial lipomas result from primitive mesenchymal meninge?s persistence and later abnormal differentiation into fatty tissue. Computed tomography scan reveals a hypodense lesion, with no enhancement after intravenous application of contrast media or perilesional edema. Magnetic resonance imaging is currently the best method for diagnosis. In case of incidental finding in a previous asymptomatic patient, no surgical treatment is indicated. Intracranial lipomas are rare malformations originated from development abnormalities and usually associated with dysraphisms. This lesion is often either asymptomatic or an incidental imaging finding. Improvements in the neuroimaging may lead to higher diagnostic rates, even in asymptomatic individuals. No surgical treatment is indicated for asymptomatic or incidental cases...

Congenital fibrolipoma of anal canal.

Although rare, congenital lipomatosis presents during first few months of life as large sub-cutaneous fatty masses on chest with extension into skeletal muscle bundles. Only a few such cases have been reported in the literature. A rare case of congenital fibrolipoma of anal canal in a 3-day-old male child is being documented in the present report.

Congenital spinal lipomas--tumor versus hamartoma.

Congenital spinal lipomas as a form of dysraphism are frequently reported in literature. A few studies have highlighted their histologic features and found them different from lipomas in other parts of the body. In a review of eight cases of spinal lipomas, we found heterotopic tissue in seven. Neural tissue, muscle, bone and cartilage were frequently encountered. The presence of meningothelial cells in one case was an unusual finding. These findings support the concept of their hamartomatous origin. Malignancy, occurring later in life in one of the heterotopic elements is known, though uncommon, and is one of the reasons, besides neurologic deficit, for long term follow-up.

Lipoma do cerebelo. Relato de caso / Lipoma of the cerebellum. case report

Lipomas intracranianos säo raros, geralmente sendo achado de autópsia. Situam-se na linha média, mais frequentemente de localizaçäo central. Podem ocorrer desde a infância até a vida adulta. Muitos dos "lipomas", na verdade säo associados a lesöes hamartomatosas ou, mesmo, a neoplasias como os meduloblastomas do cerebelo. Relatamos e discutimos um caso de lipoma de cerebelo, achado de autópsia de um recém-nascido prematuro.

Congenital quadrigeminal lipoma with osteocartilagenous element: A case report

A case of congenital tectal lipoma found incidentally at an autopsy is reported. This female fetus was a product of pregnancy termination at 24 weeks of gestational age after sonographic detection of hydrocephalus. Autopsy revealed a small mass in the periaqueductal portion. The mass was composed of adipose tissue, cartilage, and mature bony tissue with hematopoiesis. The resultant diagnosis was tectal lipoma with osteocartilagenous element. It is uncertain whether the lesion represents a teratoma or hamartoma or mesenchymal metaplasia. The osteocartilagenous component suggests the latter.