Category: C
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Cystadenocarcinoma
A glandular malignancy that forms cysts as it grows.
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Congenital cyst
A cyst present at birth resulting from abnormal development, such as a dermoid cyst, imperfect closure of a structure as in spina bifida cystica, or non-closure of embryonic clefts, ducts, or tubules, such as cervical cysts.
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Complex cyst
A cyst that consists of solid material and fluid-filled cavities; it may have walls of tissue inside it or internal echoes. When a complex cyst is identified on ultrasound, surgical removal is generally indicated to exclude malignancy.
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Cynic spasm
Spasm of the facial muscles causing a grin or snarl like a dog.
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Cynanthropy
Insanity in which the patient behaves like a dog.
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Cymatic therapy
The therapeutic uses of music and sound.
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Cylindruria
The presence of cylindroids in the urine.
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Cylindroma
A skin tumor of apocrine origin usually found on the face or forehead containing a collection of cells forming cylinders.
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Cylindroadenoma
An adenoma containing cylindrical masses of hyaline material.
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Crossed cylinder
Two cylindrical lenses at right angles to each other; used in diagnosing astigmatism.