In addition to the above theory, I have repeatedly met another - there is such a parasitic genus of crustaceans "Sacculina", which infect other crustaceans and feed on their hemolymph. So these cancers look like tumors, and the limbs are exactly like metastases and entwine the host's organs, for this similarity the disease got its name.
The first mention of cancer is found in the Egyptian Papyrus of Edwin Smith, dating back to the 16th century BC. This, one of the oldest examples of medical literature, described the surgical removal of breast cancer and indicated that there was no cure for this disease.
Several types of cancer were described by Hippocrates (460 - 370 BC). ) and designated them with the general word καρκίνος (carcinos), which translated from Greek means "crab" or "cancer". The fact is that in a malignant tumor, riddled with veins, the section resembles cancer. Roman physician Aulus Cornelius Celsus in the 1st century BC e. translated the Greek word into Latin: cancer also means cancer.
Galen began to use the word καρκίνος (carcinos) for malignant tumors and the word ὄγκος (oncos) for benign tumors. ὄγκος translated from Greek means "bloating". Later, he added the suffix -oma from the word ὄγκωμα (oncoma), meaning "tumor", to the first term, so the modern term καρκίνωμα (carcinoma) was obtained.
In modern Russian, the words " cancer "and" carcinoma ", and the branch of medicine that studies tumors is called" oncology ".