Etymology The term "neoplasm " is a synonym of "tumor". "Neoplasia " denotes the process of the formation of neoplasms/tumors,  the process is referred to as a "neoplastic " process. The word "neoplastic " itself comes from the Greek neo ("new") and plastic (" formed, molded ") . The term "tumor " derives from the Latin noun tumor , "a swelling" - ultimately from the verb tumēre "to swell" . In the British Commonwealth, the spelling "tumour " is commonly used, whereas in the U.S. the word is usually spelled "tumor" . In its medical sense "tumor " has traditionally meant an abnormal swelling of the flesh. The Roman medical encyclopedist Celsus ( 30 BC–38 AD) described the four cardinal signs of acute inflammation as tumor, dolor, calor, and rubor (swelling, pain, increased heat, and redness). (His treatise, De Medicina, was the first medical book printed in 1478 following the invention of the movable-type printing press.) In contemporary English, the word "tumor " is often used as a synonym for a cystic (liquid-filled) growth or solid neoplasm (cancerous or non-cancerous),Tumor in Medical Encyclopedia with other forms of swelling often referred to as "swellings". Related terms occur commonly in the medical literature, where the nouns "tumefaction " and "tumescence " (derived from the adjective "tumescent" ), are current medical terms for non-neoplastic swelling. This type of swelling is most often caused by inflammation caused by trauma, infection, and other factors.
Etymology The term neoplasm is a synonym of tumor. Neoplasia denotes the process of the formation of neoplasms/tumors, and the process is referred to as a neoplastic process. The word neoplastic itself comes from Greek neo 'new' and plastic ' formed, molded ' . The term tumor derives from the Latin noun tumor 'a swelling', ultimately from the verb tumēre 'to swell' . In the British Commonwealth, the spelling tumour is commonly used, whereas in the U.S. the word is usually spelled tumor . In its medical sense , tumor has traditionally meant an abnormal swelling of the flesh. The Roman medical encyclopedist Celsus ( 30 BC–38 AD) described the four cardinal signs of acute inflammation as tumor, dolor, calor, and rubor (swelling, pain, increased heat, and redness). (His treatise, De Medicina, was the first medical book printed in 1478 following the invention of the movable-type printing press.) In contemporary English, the word tumor is often used as a synonym for a cystic (liquid-filled) growth or solid neoplasm (cancerous or non-cancerous),Tumor in Medical Encyclopedia with other forms of swelling often referred to as "swellings". Related terms occur commonly in the medical literature, where the nouns tumefaction and tumescence (derived from the adjective tumescent ), are current medical terms for non-neoplastic swelling. This type of swelling is most often caused by inflammation caused by trauma, infection, and other factors.
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