Hutchinson's pupil
Encyclopedia
Hutchinson's pupil is a clinical sign
in which the pupil
on the side of an intracranial mass lesion
is dilated
and unreactive to light, due to compression of the oculomotor nerve
on that side.
The sign is named after Sir Jonathan Hutchinson
.
Medical sign
A medical sign is an objective indication of some medical fact or characteristic that may be detected by a physician during a physical examination of a patient....
in which the pupil
Pupil
The pupil is a hole located in the center of the iris of the eye that allows light to enter the retina. It appears black because most of the light entering the pupil is absorbed by the tissues inside the eye. In humans the pupil is round, but other species, such as some cats, have slit pupils. In...
on the side of an intracranial mass lesion
Mass effect (medicine)
In medicine, a mass effect is the effect of a growing mass , for example the consequences of a growing cancer....
is dilated
Mydriasis
Mydriasis is a dilation of the pupil due to disease, trauma or the use of drugs. Normally, the pupil dilates in the dark and constricts in the light to respectively improve vividity at night and to protect the retina from sunlight damage during the day...
and unreactive to light, due to compression of the oculomotor nerve
Oculomotor nerve
The oculomotor nerve is the 3rd of 12 paired cranial nerves. It enters the orbit via the superior orbital fissure and controls most of the eye's movements, including constriction of the pupil and maintaining an open eyelid by innervating the Levator palpebrae superiors muscle. The optic nerve is...
on that side.
The sign is named after Sir Jonathan Hutchinson
Jonathan Hutchinson
Sir Jonathan Hutchinson , was an English surgeon, ophthalmologist, dermatologist, venereologist and pathologist.-Life:He was born in Selby, Yorkshire, England of Quaker parents and educated in the local school...
.