PMC8247709_01
(a) Plain computed tomography (CT) brain showing left frontal irregular bony growth with intracranial projection, ventriculomegaly and left paraventricular cystic SOL. (b) Magnetic resonance imaging (MRI) brain plain T2 axial images showing irregular hypointense left frontal lesion encroaching on left frontal lobe, paraventricular cystic lesion of cerebrospinal fluid intensity is noted with air-fluid level in it. (c) T1 coronal MRI depicting relation of cyst to ventricle. (d) Post-op CT brain plain following ventriculoperitoneal shunt done for hydrocephalus showing enlargement of aerocele.
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F1
Computed tomography (CT) of the brain plain showed a calcified lesion in the left frontal region along with ventriculomegaly and a huge cystic lesion in the left frontal region [Figure 1a]. There was marked dilation of ventricles with transependymal seepage suggesting high-pressure hydrocephalus [Figure 1b and c]. Patient postoperative CT scan showed tension pneumocephalus [Figure 1d].
Computed tomography (CT) bone window (a and b) coronal view showing attachment of osteoma to the roof of orbit, lateral to the lamina paprycea signifying no ethmoidal involvement (c) axial view showing AP diameter of lesion filling >75% of frontal sinus respectively. (d) Inner aspect of free bone flap incorporating part of osteoma. (e) Remaining osteoma projecting from left frontal sinus (f) postop scan showing complete excision of osteoma but delayed extradural collection.
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F2
CT bone window was done, which elaborated details of osteoma [Figure 2a-c]. A left frontal craniotomy with free bone flap was done [Figure 2d]. About 5 x 2.5 cm irregular hard bony growth found disrupting the underlying dura [Figure 2e]. Postoperatively patient did well, scans were satisfactory [Figure 2f] and no CSF leakage was found.