Summary. The diagnostic value of computed tomography was verified in the study of mucoceles in the paranasal sinuses involving the orbit. The CT data on 43 patients with clinical suspicion of mucocele highlight the characteristic signs; 26 were found to have a mucocele at operation.

The result of a late CT control of infantile hydrocephalus is reported with an analysis of effects of the catheter on the cerebral tissue in the immediate and late postoperative course. The most frequent finding is blood in the ventricle and/or subependymal or intraparenchymal along the catheter or near its tip.

The median OS following standard temozolomide treatment concurrent with and adjuvant to radiotherapy given to (72.8% of) patients aged ≤70 years is consistent with findings reported from randomized phase III trials. The volume and expertise of the treatment center should be further investigated as a prognostic factor.

We describe the clinical, CT and MRI evolution of a patient with a primary T-lymphoma of the brain showing features similar to those of leukoencephalopathy. We report the findings that led to the cerebral biopsy performed and we discuss the striking features of this case in the light of previous reports in the literature.

Three cases with unusual manifestations of phakomatosis are reported. The first two had clinical symptoms of neurofibromatosis but CT disclosed nodular subependymal calcifications as in tuberous sclerosis. The third one presented with cerebral calcifications as found in both tuberous sclerosis and Sturge-Weber syndrome, though he had no clinical symptoms of phakomatosis.

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After surveying the different phases of their previous experience with the diagnosis and management of traumatic cerebral mass lesions, the authors analyze the correlation between clinical, computed tomographic (CT), and intracranial pressure (ICP) data in 29 patients with traumatic intracerebral hematomas and/or brain lacerations. Clinically, the patients are classified in three groups: (a) deeply comatose patients (Glascow coma scale (GCS), 4 to 5); (b) patients with intermediate disturbances of consciousness (GCS, 6 to 10); and (c) patients with minor impairment of consciousness (GCS, more than 10). Sixteen patients were operated upon. Operation was ineffective in the patients who were already deeply comatose in the first hours after injury, even though elevated ICP was definitely reduced after operation in some of them. Conversely, patients with well-limited lesions, moderate disorders of consciousness, and persisting intracranial hypertension despite medical therapy seemed to be good candidates for delayed operation by limited procedures. In patients with intermediate disturbances of consciousness and no tendency to improvement or deterioration, ICP monitoring correlated with CT scan appearance may be of practical use for making the decision to operate. However, most cases diagnosed on CT scan have a benign course; the patients recover uneventfully with conservative management. In such patients careful clinical observation is usually sufficient. (Neurosurgery, 7: 337-346, 1980).

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