Question:

Which of the following is true ?
1. Intracranial lipomas are common coccurances.
2. Usually seen in the posterior fossa.
3. They are conidered to be congenital malformations.
4. They are considered to be true intra-cranial tumours.
5. Intracranial lipomas are cystic.





Answer:

The correct answer for the question "Which of the following is true ?" is:

3. They are conidered to be congenital malformations.



Explanation
A. False [ Intracranial lipomas (ICL) are very rare brain congenital malformations, accounting for 0.34% of all brain lesions encountered. ]

B. False [ The typical location of these neoplasms is in the midline with the pericallossal distribution predominating. ]

C. True [ Initially believed to be neoplasms of mesodermal origin differentiating into adipose tissue, they are now believed to be remnants of the meninx primitive that mal-differentiated during the development of the subarachnoid cisterns. They are therefore congenital anomalies and not neoplasms. ]

D. False [ Initially believed to be neoplasms of mesodermal origin differentiating into adipose tissue, they are now believed to be remnants of the meninx primitive that mal-differentiated during the development of the subarachnoid cisterns. They are therefore congenital anomalies and not neoplasms. ]

E. False [ homogenous well-circumscribed, hypo-dense masses with CT densities in the range of -50 to -100 Hounsfield units. ]



From the manuscript:
A symptomatic Sylvian fissure lipoma in a post-traumatic patient
Radiology Case. 2014 Apr; 8(4):1-7


This article belongs to the Neuro section.




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From the manuscript

A symptomatic Sylvian fissure lipoma in a post-traumatic patient

Free full text article: A symptomatic Sylvian fissure lipoma  in a post-traumatic patient

Abstract
Lipomatous extra-axial lesions in the Sylvian fissure are a rare entity. Their identification, however, is usually simple if a systematic radiological approach is adopted. The best line of management for these lesions is still a matter of controversy and fraught with complications. We present a case of a Sylvian fissure lipoma referred to our neurosurgery services with symptomatic seizures and in a post-traumatic patient. The radiological differentiating features of intracranial lipomas and intracranial dermoids have been discussed. The unusual location of the lesion, in combination with the history of seizures and the nature of presentation (trauma being a red-herring) make this case an interesting find. The lesion was managed conservatively with good outcomes at follow up, on anti-epileptic medications.






References



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