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Invasive breast carcinoma - IARC

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CHAPTER 4<br />

Tumours of the Uterine Corpus<br />

The uterine corpus represents the second most common site<br />

for malignancy of the female genital system. These neoplasms<br />

are divided into epithelial, mesenchymal, mixed epithelial and<br />

mesenchymal tumours and trophoblastic tumours.<br />

Endometrial <strong>carcinoma</strong> occurs predominantly in developed<br />

countries and is frequently associated with obesity. Two major<br />

types are distinguished. Type I is estrogen-dependent and<br />

develops through the hyperplasia-<strong>carcinoma</strong> sequence. Type<br />

II is not estrogen-dependent and develops independently of<br />

endometrial hyperplasia. It occurs in older women and is more<br />

aggressive.<br />

Carcinosarcoma is still classified morphologically as a mixed<br />

epithelial and mesenchymal tumour, although it is considered<br />

monoclonal, with immunohistochemical and molecular studies<br />

strongly supporting its inclusion in the epithelial group. Its<br />

prognosis is worse than that of other members of the epithelial<br />

category.<br />

Gestational trophoblastic disease is approximately 10-fold<br />

more common in the developing than in developed countries.<br />

Risk factors include a history of prior gestational trophoblastic<br />

disease, a diet low in vitamin A and blood group A women married<br />

to group 0 men.

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