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The word benign means ' favourable, kind, fortunate, salutary, propitious '. [1] However, a benign tumor is not benign in the usual sense; the name merely specifies that it is not "malignant", i.e. cancerous. While benign tumors usually do not pose a serious health risk, they can be harmful or fatal. [2]
Similarly, sun or especially UV exposure is an important risk factor for both actinic keratosis which can progress into melanomas [10] as well as skin cancer. Smoking is a risk factor for premalignant (as well as malignant) lung lesions. Hereditary conditions that are risk factors to cancer can also be risk factors to premalignant lesions.
According to Know Your Lemons, a nonprofit global organization that focuses on making information about breast cancer warning signs and detection methods accessible, a hard lump is a common sign ...
In the case of an existing tumour, a biopsy would then be required to make a diagnosis and distinguish whether the tumour is malignant or benign. [8] This involves examination of a small sample of the tissue in a laboratory. [8] If detected as a malignant tumour, treatment is necessary; treatment during early stages is most effective. [8]
The colorectal adenoma is a benign glandular tumor of the colon and the rectum. It is a precursor lesion of the colorectal adenocarcinoma (colon cancer). [1] [2] [3] They often manifest as colorectal polyps.
The photo shows the characteristic dark color of an oncocytoma, a rare type of benign neoplasm, at the left side of the image (the normal lobulated salivary gland tissue is to the right). An salivary gland oncocytoma (also known as an oxyphilic adenoma ) is a well-circumscribed, benign neoplastic growth comprising about one percent of all ...
It can be a benign tumor such as thyroid adenoma, [1] or it can be a malignant neoplasm (thyroid cancer), such as papillary, follicular, medullary or anaplastic thyroid cancer. [2] Most patients are 25 to 65 years of age when first diagnosed; women are more affected than men.
There are two distinct types of tumors: benign and malignant. Both types of tumors share a number of general characteristics, the broadest being that they are an abnormal proliferation of cells. [2] The main difference between the two types is what happens once the tumor has started growing.