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Paranasal sinuses osteomas are known as biological benign tumours. However, due to the peculiar anatomical relationships, patients harbouring an osteoma within the frontal sinus are exposed to serious orbital and intracranial complications. We report two unusual cases of intracranial mucocoeles associated with frontal osteomas. In one of them, a superposed tension aerocoele required emergency surgery. Although aggressive treatment of asymptomatic osteomas is not warranted, these lesions must be carefully observed and resected as soon as they show clinical and/or radiological signs of progression. The physiopathological and clinical aspects are discussed.

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The authors report a case of spinal subarachnoid hemorrhage caused by neurofibromas of the cauda equina. An examination of the literature revealing 13 similar cases and an analysis of this case showing three neurofibromas of the cauda equina prompted an hypothesis emphasizing the origin of bleeding and the difficulties associated with a correct diagnosis.

The authors report a case of spinal subarachnoid hemorrhage caused by neurofibromas of the cauda equina. An examination of the literature revealing 13 similar cases and an analysis of this case showing three neurofibromas of the cauda equina prompted an hypothesis emphasizing the origin of bleeding and the difficulties associated with a correct diagnosis.

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