Surgery (removing the cancer in an operation) is the most common treatment for all stages of colon cancer. A doctor may remove the cancer using one of the following types of surgery: Local excision: If the cancer is found at a very early stage, the doctor may remove it without cutting through the abdominal wall.
The study began in 1932, when syphilis was a widespread problem and there was no safe and effective treatment. The study was designed to measure the progression of untreated syphilis. By 1947, penicillin had been shown to be an effective cure for early syphilis and was becoming widely used to treat the disease.
Primary syphilis â In this first stage, syphilis causes a painless ulcer called a chancre, usually in the genital area where syphilis bacteria enter the body. This stage begins 10 to 90 days (average three weeks) after a person has been exposed to someone with syphilis.