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Книги по МРТ КТ на английском языке / MRI and CT of the Female Pelvis Hamm B., Forstner R..pdf
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Cervical Cancer

121

 

 

or parametrial involvement, bladder/rectum extension, and distant metastases. In FIGO stage I, cervical carcinoma is confined to the cervix. Microscopically invasive cervical carcinoma with a maximal depth of stromal invasion <0.5 cm and maximal width <0.7 cm in horizontal diameter is defined as FIGO stage IA. Clinically visible lesions up to 4.0 cm and limited to the cervix or preclinical cancers greater than stage IA define FIGO stage IB1, while clinically visible lesions greater than 4.0 cm in size define stage IB2. FIGO stage II comprises cervical carcinoma invading beyond the uterus but not to pelvic wall or lower third of vagina. If there is no obvious parametrial involvement, the cancer is staged as FIGO IIA; parametrial invasion defines stage FIGO IIB. In FIGO stage III the tumor has invaded the lower third of vagina (IIIA) or has extended to the pelvic wall and/or has caused hydronephrosis or a nonfunctioning kidney (IIIB). All cases with hydronephrosis or nonfunctioning kidney are included in stage IIIB, unless they are known to be due to other causes. FIGO stage IVA is characterized by

invasion of the bladder or rectum or by tumor extension beyond the true pelvis. The presence of distant metastases establishes stage IVB disease.

1.8\ Growth Patterns

The vast majority of cervical carcinomas arise from the squamocolumnar junction and typically show exophytic growth in the outer cervix in younger women. With retraction of the transformation zone into the cervical canal in older women, endophytic growth patterns of cervical cancer become more common (Fig. 1).

Cervical cancer is characterized by continuous invasive growth with extension into the vagina, parametria, uterine corpus, bladder, rectum, and peritoneal cavity. In the same way, the tumor spreads to pelvic lymph nodes. Preferred sites of nodal metastases are the obturator fossa, the nodes along the external, internal, and common iliac vessels, the presacral lymph nodes, and the paraaortic nodes (Fig. 2). The risk of lymph node

Fig. 1  Growth patterns of cervical cancer: exophytic, endophytic ulcerative, and endophytic expansion with barrel-shaped configuration of the cervix (from Schmidt-Matthiesen and Wallwiener 2005)

Percentage

%

 

50

 

 

 

 

 

 

40

 

 

 

 

Pelvic lymph node

 

 

 

 

 

 

 

30

 

 

 

 

metastasis

 

 

 

 

 

 

 

20

 

 

 

 

Para-aortic lymph nodw

 

 

 

 

 

metastasis

 

10

 

 

 

 

 

Fig.2  Probability of lymph

0

 

 

 

 

 

node metastasis by tumor

 

 

 

 

FIGO stage

stage

ΙA1 ΙA2

ΙB

ΙΙA

ΙΙB

ΙΙΙ ΙVA