Final answer:
Gumma lesions on the skin and bones, heart damage, and neurological symptoms are characteristic of tertiary syphilis, which is the final and most severe stage of the disease.
Step-by-step explanation:
Gumma lesions on the skin and bones, heart damage, and neurological symptoms are characteristic of tertiary syphilis. Tertiary syphilis is the final stage of the disease and can occur 10 to 20 years after initial infection. It produces the most severe symptoms, including the development of granulomatous lesions called gummas in various locations, such as mucous membranes, bones, and internal organs. Cardiovascular syphilis and neurosyphilis are the most deadly forms of tertiary syphilis, which can result in fatal complications like aortic aneurysm, coronary stenosis, dementia, personality changes, seizures, and general paralysis.