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The porta hepatis or transverse fissure of the liver is a short but deep fissure, about 5 cm long, extending transversely beneath the left portion of the right lobe of the liver, nearer its posterior surface than its anterior border. It joins nearly at right angles with the left sagittal fossa, and separates the quadrate lobe in front from the ...
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 ...
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.
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.
The right lobe is of a somewhat quadrilateral form. Its under and posterior surfaces being marked by three fossæ: the fossa for the portal vein, the fossa for the gall-bladder and the fossae for the inferior vena cava. These separate the right lobe into two smaller lobes on its left posterior part: the quadrate lobe and the caudate lobe.
Syringomyelia is a generic term referring to a disorder in which a cyst or cavity forms within the spinal cord. Often, syringomyelia is used as a generic term before an etiology is determined. [ 3 ] This cyst, called a syrinx, can expand and elongate over time, destroying the spinal cord. The damage may result in loss of feeling, paralysis ...
In 1879, the syndrome was first described in a 64 years old male by Anderson Stuart, a medical student. [1] In 1959, Hamming and Vink first described the management of the PAES in a 12-year-old patient. The patient was treated with myotomy of the medial head of the gastrocnemius muscle and concomitant endarterectomy of the popliteal artery ...
The facial nerve is a mixed nerve (i.e. containing both sensory and motor nerve fibres) and therefore compression can create sensory (e.g. anesthesia - numbness, or paresthesia - tingling) and motor deficits. Early surgical intervention tends to be carried out because after three to four months, fibrosis (replacement with fibrous tissue) occurs ...