NPH
Normal pressure hydrocephalus. The ventricles, or fluid-filled cavities of the brain are enlarged and bulging like a balloon. Can cause symptoms of dizziness, confusion, and problems with urine.
OBSTRUCTIVE
Blockage of something.
OCCIPITAL
Of or referring to the occiput.
OCCIPITAL HORN
The back and inner part of the lateral ventricle that points towards the occipital lobe of the brain.
OCCIPITAL LOBE
The back part of the brain. The occipital lobes help you to see.
OCCIPUT
Refers to the back of the skull.
ODONTOGENIC ABSCESS
A collection of pus or infection coming from the tooth.
ODONTOID
A process related to the tooth.
OIL CYST
A type of cyst formed in the breast after trauma and fat necrosis. This is not cancerous.
OLD FILMS
These refer to the patient's old mammograms. Old mammograms are VERY important in interpreting the current mammogram. Comparing with old mammograms allows the radiologist to be much more accurate with his/her diagnosis. For example, let us say that there is an asymmetry on the current mammogram. If the asymmetry is unchanged from a mammogram from 3 years ago, the likelihood that it is a cancer is very low.