Intracranial Lipoma in Medulla Oblongata

Surgical Neurology - SURG NEUROL 01/1991; 36(5).


Intracranial lipomas are rare, and most of these tumors are found in the region of the corpus callosum, followed by cerebellopontine angle. We present a case of a intracranial lipoma in 30-year-old man. Brain computed tomography (CT) scan and magnetic resonance images (MRI) showed a mass in the medulla oblongata extending to foramen magnum. The histopathologically, diagnosis of lipoma was confirmed. Although there were several cases of cervical intraspinal lipoma extending into posterior cranial fossa, there have been no previous reports of a lipoma arising from the medulla oblongata that extended into the foramen magnum. We describe a rare case of intradural subpial lipoma in the medulla oblongata with a review of the literature.

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Available from: Dae Won Kim
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    ABSTRACT: Background : Intracranial lipomas are uncommon benign lesions of the central nervous system. They preferentially occur near the midline, most frequently in the pericallosal cistern, and are often associated with various neurologic and systemic anomalies. Since the advent of CT scanning and MR imaging, unexpected findings of intracralial lipomas have increased. We identified 11 cases of intracranial lipomas diagnosed by CT and MR and analyzed their characteristic clinical and radiologic findings. Methods : We retrospectively reviewed 11 cases of intracranial lipomas. MR was used in all cases and CT in three. Results : There were seven men and four women whose ages ranged from six months to 76 years, with a mean of 39 years. Six (55%) lipomas were located in the quadrigeminal plate and five (45%) in the peri - callosal area. The pericallosal lipomas were divided into three cases of curvilinear type and two cases of tubulonodular type. Of the six quadrigeminal lipomas, five cases (83%) were associated with either hypoplasia of the unilateral (four) or bilateral (one) superior and/or inferior colliculus. One case of quadrigeminal lipoma was associated with hypoplasia of the cerebellar vermis, agenesis of the septum pellucidum, and glioblastoma multiforme. All cases of pericallosal tubulonodular type were associated with dysgenesis of the corpus callosum and enlarged ventricles. However, all cases of pericallosal curvilinear type were not associated with other anomalies. Four (36%) cases found incidentally were asymptomatic. Seizure was the most frequent clinical presentation in five (45%) cases, followed by headaches in three (27%) and mental retardation in one (9%). Of five seizures cases, three had secondary generalized seizures and two had generalized tonic clonic seizures. Conclusions : Quadrigeminal and pericallosal lipomas were the most common types of intracranial lipomas. Sixty-three percent of the lesions were associated with adjacent brain malformations of varying degrees. Four cases were asymptomatic, while the others presented with seizures, headache, and mental retardation. J Korean Neurol Assoc 19(2):149~154, 2001
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    ABSTRACT: Intracranial lipomas are uncommon and rarely symptomatic lesions accounting for 0.06 to 0.46% of intracranial lesions. The management of symptomatic dorsal brain stem lipomas was once limited to cerebrospinal fluid diversion, but with recent advances in microsurgery, they now may be directly treated. We report three patients with dorsal brain stem lipomas, two of which involved the quadrigeminal cistern and one of which was in the cisterna magna region. Antenatal documentation by ultrasound examination in one patient represents the first reported in utero diagnosis of quadrigeminal cistern lipoma. Computed tomographic and magnetic resonance imaging scans were diagnostic. The surgical experience in two symptomatic patients is discussed. Microsurgical decompression was performed in each without neurological deficit, and clinical symptoms postoperatively subsided. No patient required a permanent cerebrospinal fluid shunt. The management of symptomatic dorsal brain stem lipomas is discussed, and an algorithm is proposed.
    Full-text · Article · Jun 1996 · Neurosurgery
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    ABSTRACT: We report on a male epileptic patient, presently 27 years old, who has suffered complex-partial attacks for 19 years. Under treatment with carbamazepine the seizures were completely controlled. In addition, the patient exhibited partial hypopituitarism. CT and MRI revealed the presence of 2 lipomas, one located within the optico-chiasmatic cistern and the other one in the medial temporal lobe. To our knowledge, this combination of the generally rare lesions has not been described yet.
    No preview · Article · Feb 1997 · Neurosurgical Review
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