KEY FACTS
Imaging
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Soft tissue mass in cervix: Hypoechoic or isoechoic ± necrosis
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Hydro- or hematometra from cervical obstruction
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Mass extending into upper vagina
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MR is best modality for local staging and planning of radiation therapy
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Tumor: Intermediate- to high-signal mass replacing dark cervical stroma on T2-weighted sequences
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Accuracy superior to FIGO staging for size, parametrial extension, lymph nodes
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Parametrial invasion: Accuracy: 88-97%, specificity: 93%, negative predictive value: 94-100%
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PET/CT best modality for overall staging: Nodal disease, liver, bone, and lung metastases
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Revised FIGO staging uses information from CT or MR; cystoscopy and sigmoidoscopy not mandatory
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Invasion of posterior bladder wall, anterior rectal wall, ureters
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Hydronephrosis implies stage IIIB disease
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Enlarged lymph nodes
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Abundant internal color flow on color Doppler
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3D US may be used to assess tumor volume before/after therapy
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Ultrasound may be used to guide placement of radiotherapy instruments
Top Differential Diagnoses
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Cervical fibroid
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Cervical polyp
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Endometrial cancer invading cervix
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Adenoma malignum/minimal deviation adenocarcinoma
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Rarer cervical tumors: Lymphoma, neuroendocrine/small cell carcinoma
Pathology
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~ 80-90% are squamous carcinoma
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Arise at squamocolumnar junction from precursor lesions
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Cervical intraepithelial neoplasia grades I-III
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Stage I: Confined to cervix
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Stage II: Beyond uterus but not to pelvic sidewall or lower 1/3 of vagina
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Stage III
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IIIA: Lower 1/3 of vagina
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IIIB: Pelvic side wall (within 3 mm of obturator internus, levator ani or pyriformis muscles, or iliac vessels) or hydronephrosis/nonfunctioning kidney
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Stage IV: Bladder/rectal involvement or distant metastases (lung, liver, bones)
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Presence of pelvic or paraaortic lymphadenopathy alters prognosis but not FIGO stage
Clinical Issues
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Abnormal bleeding, pain, or discharge
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Detected by screening cytology from Pap smear
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± testing for high-risk HPV
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3rd most common gynecologic malignancy in USA and most common gynecologic malignancy worldwide
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Risk factors: HPV infection most important, early-onset sexual activity, multiple partners, smoking, immunosuppression, HIV infection
Scanning Tips
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Look for disruption of normal cervical morphology
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And for abnormal color flow
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