tertiary syphilis

noun Pathology.
the third stage of syphilis, characterized by involvement of the internal organs, especially the brain, spinal cord, heart, and liver.

Origin:
1870–75

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

tertiary syphilis n.
The final stage of syphilis, marked by gumma formation, cellular infiltration, and cardiovascular and central nervous system lesions.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

tertiary syphilis

psychosis caused by widespread destruction of brain tissue occurring in some cases of late syphilis. Mental changes include gradual deterioration of personality, impaired concentration and judgment, delusions, loss of memory, disorientation, and apathy or violent rages. Convulsions are not uncommon, and while temporary remissions sometimes occur, untreated paresis is eventually fatal.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Symptoms of tertiary syphilis depend on which organs have been affected.
Untreated, late-stage tertiary syphilis can cause inflammation and blockage of the arteries that supply the brain.
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