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PHACE syndrome. PHACE syndrome is a medical condition characterized by uncommon associations between birth defects of the brain, skin (large facial infantile hemangiomas), arteries, heart and eyes. "PHACE" is an acronym for the parts of the body the syndrome usually impacts: Posterior fossa abnormalities and other structural brain abnormalities.
Collier's sign (also known as Collier's tucked lid sign [1] or posterior fossa stare [2]) is bilateral or unilateral eyelid retraction. It is an accepted medical sign of a midbrain lesion, first described in 1927 by J Collier. [3] With the eyes in the primary position, the sclera can be seen above the cornea, and further upgaze increases the ...
Dandy–Walker malformation. Dandy–Walker malformation (DWM), also known as Dandy–Walker syndrome (DWS), is a rare congenital brain malformation in which the part joining the two hemispheres of the cerebellum (the cerebellar vermis) does not fully form, and the fourth ventricle and space behind the cerebellum (the posterior fossa) are ...
The posterior fat pad is normally pressed in the olecranon fossa by the triceps tendon, and hence invisible on lateral radiograph of the elbow. [3] When there is a fracture of the distal humerus, or other pathology involving the elbow joint, inflammation develops around the synovial membrane forcing the fat pad out of its normal physiologic resting place.
The Posterior cranial fossa is colored in blue, yellow, and red. The posterior cranial fossa is the part of the cranial cavity located between the foramen magnum, and tentorium cerebelli. It is formed by the sphenoid bones, temporal bones, and occipital bone. It lodges the cerebellum, and parts of the brainstem.
Parinaud's syndrome is a constellation of neurological signs indicating injury to the dorsal midbrain. More specifically, compression of the vertical gaze center at the rostral interstitial nucleus of medial longitudinal fasciculus (riMLF). It is a group of abnormalities of eye movement and pupil dysfunction and is named for Henri Parinaud [6 ...
Medulloblastoma is the second-most frequent brain tumor in children after pilocytic astrocytoma [ 37 ] and the most common malignant brain tumor in children, comprising 14.5% of newly diagnosed brain tumors. [ 38 ] In adults, medulloblastoma is rare, comprising fewer than 2% of CNS malignancies. [ 39 ]
Intraventricular hemorrhage. Intraventricular hemorrhage (IVH), also known asintraventricular bleeding, is a bleeding into the brain's ventricular system, where the cerebrospinal fluid is produced and circulates through towards the subarachnoid space. It can result from physical trauma or from hemorrhagic stroke.