The posterior cranial fossa was defined as the osseous anatomical area with a floor formed by the occipital bone (basiocciput portion of the clivus and supraocciput portion of the occipital bone up to the insertion of the tentorium
cerebelli, which formed the superior boundary of this fossa) and the basisphenoid.
The intracranial pain-sensitive structures include the arteries of the circle of Willis and the first few centimetres of their medium-sized branches, meningeal (dural) arteries, large veins and dural venous sinuses, and portions of the dura near blood vessel including the tentorium
and the diaphragma sellae.
Cranial computerized tomography (CT) revealed frontal bossing; and basal ganglia, falx cerebri, and tentorium
cerebelli calcifications (Picture 4).
Small, rotated, raised cerebellar vermis in touch with tentorium
posterior incisura region can expose the supratentorial part of the trochlear nerve.
The other features of PLS are the intracranial calcification of choroid plexus and tentorium
on radiographic examination and palmoplantar hyperhidrosis.
Milnne Edwards, 1848) Gastropods Gastropoda Diodora gibberula (Lamarck, 1822) Cellana radiata (Born, 1778) Trochus radiates (Gmelin, 1791) Trochus tentorium
(Gmelin,1791) Umbonium vestiarium (Linnaeus, 1758) Trochus stellatus (Gmelin, 1791) Trochus maculates (Linnaeus, 1758) Clanculus guineensis (Gmelin, 1791) Astraea stellata (Gmlin, 1791) Astraea semicostata (Kiener, 1850) Clypeomorus bifasciatus (Sowerby II, 1855) Clypeomorus moniliferus (Kiener, 1841) Telescopium telescopium (Linnaeus, 1758) Potamides cingulatus (Gmelin, 1791) Ischnochiton australis (G.
The term "supratentorial mass lesion" is conveniently applied to the localization of intracranial lesion lying above the tentorium
cerebelli whether of neoplastic, vascular or chronic/acute inflammatory origin, which by virtue of occupying space within the skull tends to raise intracranial tension (ICT).
For instance, a medulloblastoma is often curable, whereas a morphologically similar tumor above the tentorium
has a high potential for mortality.
The MRI revealed a low T1 and heterogeneous T2 signal extra-axial, enhancing lesion along the left tentorium
cerebelli, with no edema in the adjacent brain parenchyma.
2) LPM usually occurs in young and middle age patients, with most common locations being cerebral convexities, skull base, parasagittal area within the superior sagittal sinus, cervical canal, optic nerve and tentorium
Magnetic resonance imaging (MRI) showed an enhanced infiltration of left middle cranial fossa dura with infiltration of tentorium
and mild compression of temporobasal brain with propagation in the left middle ear and the cavernous sinus and surrounding the left internal carotid artery (Figure 2).