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Invasive breast carcinoma - IARC

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Fig. 5.44 Wilms tumour. The tumour is composed of primitive tubules set in a background of renal blastema.<br />

ent. Both the epithelial and smooth muscle<br />

components are uniformly bland without<br />

any significant mitotic activity.<br />

D i ff e rentiating features from minimal<br />

deviation adeno<strong>carcinoma</strong> include the<br />

well circumscribed nature of adenomyoma<br />

and the absence of a desmoplastic<br />

stromal reaction or focal atypia {1005}.<br />

Endometrial type<br />

Another variant of cervical adenomyoma<br />

is similar to that found within the corpus<br />

{1002}. It is composed of endometrialtype<br />

glands surrounded by endometrialtype<br />

stroma that is, in turn, surrounded<br />

by smooth muscle that predominates.<br />

The glands and stroma are bland. Minor<br />

foci of tubal, mucinous or squamous<br />

epithelium may be found. These adenomyomas<br />

may or may not be associated<br />

with uterine adenomyosis. The most likely<br />

diff e rential diagnoses are atypical<br />

polypoid adenomyoma and low grade<br />

adenosarcoma.<br />

Atypical polypoid adenomyoma<br />

In atypical polypoid adenomyoma the<br />

glandular component exhibits architectural<br />

complexity that is usually marked. It<br />

is similar to the corresponding tumour<br />

within the uterine corpus and usually<br />

involves the lower uterine segment or<br />

upper endocervix (see chapter on uterine<br />

corpus).<br />

Prognosis and predictive factors<br />

Simple polypectomy or local excision<br />

c u res most cervical adenomyomas.<br />

H o w e v e r, re c u r rences have been<br />

described following local excision, and<br />

residual tumour may be found at hysterectomy.<br />

286 Tumours of the uterine cervix

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