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Dysplasia is the earliest form of precancerous lesion recognizable in a biopsy. Dysplasia can be low-grade or high-grade. High-grade dysplasia may also be referred to as carcinoma in situ. Invasive carcinoma, usually simply called cancer, has the potential to invade and spread to surrounding tissues and structures, and may eventually be lethal.
M8201/2 Cribiform carcinoma in situ (C50._) Ductal carcinoma in situ, cribiform type; M8201/3 Cribiform carcinoma, NOS Ductal carcinoma, cribiform type; M8202/0 Microcystic adenoma (C25._) M8204/0 Lactating adenoma; M8210/0 Adenomatous polyp, NOS Polypoid adenoma; M8210/2 Adenocarcinoma in situ in adenomatous polyp Adenocarcinoma in situ in ...
Potentially-malignant neoplasms include carcinoma in situ. They are localised, and do not invade and destroy but in time, may transform into cancer. Malignant neoplasms are commonly called cancer. They invade and destroy the surrounding tissue, may form metastases and, if untreated or unresponsive to treatment, will generally prove fatal.
In HGPIN, the basal cell layer is disrupted but present. PIN is primarily found in the peripheral zone of the prostate (75-80%), rarely in the transition zone (10-15%) and very rarely in the central zone (5%), a distribution that parallels the zonal distribution for prostate carcinoma. [7]
The full chapter can be found on pages 101 to 144 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization. See here for a tabular overview of primary, secondary, in situ, and benign neoplasms.
The common, unspecified variant of the entity was once considered to be a carcinoma in situ, [2] although the term "carcinoma in situ" is now largely historical as it is not an accurate description of the process. [3]
The term dysplasia is typically used when the cellular abnormality is restricted to the originating tissue, as in the case of an early, in-situ neoplasm. [ citation needed ] Dysplasia, in which cell maturation and differentiation are delayed, can be contrasted with metaplasia , in which cells of one mature, differentiated type are replaced by ...
A precancerous condition is a condition, tumor or lesion involving abnormal cells which are associated with an increased risk of developing into cancer. [1] [2] [3] Clinically, precancerous conditions encompass a variety of abnormal tissues with an increased risk of developing into cancer.