Adenocarcinoma in Situ (also known as Adenocarcinoma in Situs, in Situ, Adenocarcinoma): A lesion with cytological characteristics associated with invasive adenocarcinoma but the tumor cells are confined to the GLANDULAR EPITHELIAL CELLS of origin. Adenocarcinoma in situ of the CERVIX and the LUNG are the most common.

NIH MeSH · D065311Diseases

Adenocarcinoma in Situ

Also known asAdenocarcinoma in Situs · in Situ, Adenocarcinoma · Situ, Adenocarcinoma in · Adenocarcinoma, Intraepithelial · Adenocarcinomas, Intraepithelial · Intraepithelial Adenocarcinoma · Intraepithelial Adenocarcinomas · Adenocarcinoma, Preinvasive · Adenocarcinomas, Preinvasive · Preinvasive Adenocarcinoma · Preinvasive Adenocarcinomas

Definition

MeSH classification

C04.557.470.200.025.014
C04.557.470.200.240.124
C23.149.249

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Related concepts

Adenocarcinoma

A malignant epithelial tumor with a glandular organization.

Adenocarcinoma, Bronchiolo-Alveolar

A carcinoma derived from epithelium of terminal bronchioles, in which the neoplastic tissue extends along the alveolar walls and grows in sm…

Adenocarcinoma, Clear Cell

An adenocarcinoma characterized by the presence of varying combinations of clear and hobnail-shaped tumor cells. There are three predominant…

Adenocarcinoma, Follicular

An adenocarcinoma of the thyroid gland, in which the cells are arranged in the form of follicles. (From Dorland, 27th ed)

Adenocarcinoma, Mucinous

An adenocarcinoma producing mucin in significant amounts. (From Dorland, 27th ed)

Adenocarcinoma of Lung

A carcinoma originating in the lung and the most common lung cancer type in never-smokers. Malignant cells exhibit distinct features such as…

Adenocarcinoma, Papillary

An adenocarcinoma containing finger-like processes of vascular connective tissue covered by neoplastic epithelium, projecting into cysts or …

Adenocarcinoma, Scirrhous

An adenocarcinoma with a hard (Greek skirrhos, hard) structure owing to the formation of dense connective tissue in the stroma. (From Dorlan…

Common questions about Adenocarcinoma in Situ

What does Adenocarcinoma in Situ mean in medicine?

A lesion with cytological characteristics associated with invasive adenocarcinoma but the tumor cells are confined to the GLANDULAR EPITHELIAL CELLS of origin. Adenocarcinoma in situ of the CERVIX and the LUNG are the most common. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.

Is Adenocarcinoma in Situ known by any other names?

Yes. Adenocarcinoma in Situ is also referred to as Adenocarcinoma in Situs, in Situ, Adenocarcinoma, Situ, Adenocarcinoma in, Adenocarcinoma, Intraepithelial in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.

Where does Adenocarcinoma in Situ sit in the medical classification?

Adenocarcinoma in Situ falls under the broader medical category "Diseases" in the MeSH hierarchy (tree numbers: C04.557.470.200.025.014, C04.557.470.200.240.124, C23.149.249). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.

Where can I get a plain-language explanation of Adenocarcinoma in Situ?

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Source: NIH MeSH 2026 (D065311) — National Library of Medicine, public domain. View official MeSH record ↗