What does adenosis mean?
Adenosis is a noun used in medicine and pathology to describe an abnormal condition of glandular tissue — typically an enlargement, overgrowth, or other disorder of the glands that make up organs such as the breast, prostate, or uterus. It most often appears in specific diagnostic phrases: sclerosing adenosis of the breast, for instance, is a benign proliferation of glandular and connective tissue commonly encountered in biopsy results, while vaginal adenosis describes ectopic glandular tissue in the vagina. Because it is a clinical rather than colloquial term, adenosis carries a neutral, descriptive connotation; it names a histological finding rather than a specific disease outcome, and many forms are entirely benign. The word derives from the Greek 'adēn', meaning gland, combined with the suffix '-osis', which denotes an abnormal condition. For readers, encountering adenosis usually signals a discussion of pathology reports, medical imaging, or health journalism, where precision about which glands are affected matters greatly.
nounA medical condition in which glandular tissue is abnormally enlarged, increased in number, or otherwise diseased; the term is used especially in pathology to describe glandular proliferation or hyperplasia.
- Pathology: any disease or abnormal condition of glandular tissue, especially benign proliferation or hyperplasia of glands (e.g. sclerosing adenosis of the breast).
"The biopsy revealed adenosis of the breast, a benign proliferation of the glandular tissue."
"Sclerosing adenosis is a common benign finding on breast biopsies and does not increase cancer risk significantly."
"Histological examination showed adenosis of the prostatic glands, with no evidence of malignancy."
The plural follows the standard Greek-derived '-osis' → '-oses' pattern, as with neurosis/neuroses. In practice, the plural is rare because the term is typically applied to a single pathological finding at a time.
"Multiple adenoses were noted across the examined tissue sections."
The 'adeno-' in adenosis comes straight from the Greek word for gland — the same root that gives us 'adenoids', those famously troublesome tissues at the back of your nose.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of adenosis
Adenosis derives from the ancient Greek 'adēn' (ἀδήν), meaning 'gland', combined with the suffix '-osis', which in medical terminology denotes an abnormal or diseased condition. The Greek root entered modern scientific Latin during the development of systematic pathology, and from there passed into English medical vocabulary. The same root underlies related terms such as adenoma, adenoid, and adenitis, all of which concern glands or gland-like structures.
How adenosis is actually used
Adenosis is a technical term used almost exclusively in medical and pathological contexts; it is not part of everyday vocabulary. It frequently appears as part of compound diagnostic terms naming the affected organ, such as sclerosing adenosis (breast) or vaginal adenosis. The word carries no figurative or informal usage.
Easily confused with adenosis
An adenoma is a benign tumour arising from glandular tissue, whereas adenosis refers more generally to any abnormal condition or proliferation of glands without implying a discrete tumour.
Adenopathy denotes disease of the lymph nodes specifically, while adenosis refers to abnormality of glandular tissue in general.