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Endometrial intraepithelial neoplasia (EIN) is a premalignant lesion of the uterine lining that predisposes to endometrioid endometrial adenocarcinoma. It is composed of a collection of abnormal endometrial cells, arising from the glands that line the uterus , which have a tendency over time to progress to the most common form of uterine cancer ...
Cancer in cats can occur in any location or body system, [3] and most symptoms can be detected externally. [2] While each type of cancer has its own distinctive symptoms, most indicate their presence by the occurrence and the prolonged presence of any common symptom. [1] Some of the general symptoms of cancer in cats are: [3]
Pre-cancerous endometrial hyperplasias are also referred to as endometrial intraepithelial neoplasia. [41] Mutations in the KRAS gene can cause endometrial hyperplasia and therefore Type I endometrial cancer. [37] Endometrial hyperplasia typically occurs after the age of 40. [9]
Glands bearing a strong resemblance to endometrial-type glands Benign tumors have mature-appearing glands in a fibrous stroma; Borderline tumors have a complex branching pattern without stromal invasion; Carcinomas (malignant tumors) have invasive glands with crowded, atypical cells, frequent mitoses.
There is an association with endometriosis and concurrent primary endometrial carcinoma (endometrial cancer). On gross pathological examination, the tumor is cystic and may be solid and some arise in cystic endometriosis. In 40% of cases, endometrioid tumors are found bilaterally. [3]
High grade anal intraepithelial neoplasia. Progression of pancreatic intraepithelial neoplasia, including mutations. [1] Cervical intraepithelial neoplasia (CIN), spanning a bit more than 2/3 of the thickness of the cervical epithelium. Intraepithelial neoplasia (IEN) is the development of a benign neoplasia or high-grade dysplasia in an ...
Carcinosarcoma of the uterus. In gross appearance, MMMTs are fleshier than adenocarcinomas, may be bulky and polypoid, and sometimes protrude through the cervical os.On histology, the tumors consist of adenocarcinoma (endometrioid, serous or clear cell) mixed with the malignant mesenchymal elements; alternatively, the tumor may contain two distinct and separate epithelial and mesenchymal ...
Uterine adenomyoma, the localized form of uterine adenomyosis, is a tumor composed of endometrial gland tissue and smooth muscle in the myometrium. [2] Adenomyomas containing endometrial glands are also found outside of the uterus, most commonly on the uterine adnexa but can also develop at distant sites outside of the pelvis . [ 3 ]