Webster's New World Medical Dictionary

granulomatous colitis
See 
colitis, Crohn’s.
granulosa cell tumor
A tumor belonging to the
sex cord-stroma group of tumors of the ovary,
sometimes referred to as granulosa-theca cell
tumors. Abbreviated GCT. GCTs commonly produce
estrogen, and the accompanying symptoms of
excess estrogen are often the reason for early diag-
nosis. Adult GCTs make up the majority of GCTs and
usually occur in postmenopausal women. Most
juvenile GCTs develop in individuals younger than
30 years and tend to recur within the first 3 years.
Treatment of GCTs involves surgical removal, and
the prognosis is generally good.
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Graves disease
An autoimmune disease that pro-
duces general overactivity (toxicity) of the thyroid
gland, which becomes enlarged into a goiter. Graves
disease is the most common disease that causes an
excess of thyroid hormone (hyperthyroidism).
Grave’s disease is frequently associated with protru-
sion of the eyes (ophthalmopathy). Dermopathy is a
rare, painless, reddish lumpy skin rash that occurs
on the front of the leg in some patients. Graves dis-
ease can be diagnosed via a typical thyroid scan
(which shows diffuse, increased uptake), or by test-
ing the blood for thyroid-stimulating immunoglobu-
lin (TSI) and finding abnormally high levels.
Treatment includes antithyroid medications, removal
of thyroid tissue via surgery (subtotal thyroidec-
tomy), and radioiodine (RAI). Also known as diffuse
toxic goiter.
gravid
Pregnant.
gray matter
The cortex of the brain, which con-
tains nerve cell bodies. The gray matter is so named
because it is darker than the white matter, the part
of the brain that contains myelinated nerve fibers.
Gray’s Anatomy
A book that was originally
titled 
Anatomy Descriptive and Surgical,
by Henry
Gray, that appeared in 1858. Known as 
Gray’s
Anatomy.