cervical cancer. cervical cancer is cancer that starts in the cervix, the lower part of the uterus...
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Cervical cancer
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Cervical cancer is cancer that starts in the cervix, the lower part of the uterus that opens at the top of the vagina.
It is the most common form of cancer in women in developing countries (because of lack screening programs), and the second most common form of cancer in the world as a whole.
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incidence
Cervical cancer accounts for 6% of all malignancies in women.
It affect women of middle age or older mainly 45-55 years, but it may be diagnosed in any reproductive-aged woman.
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Causes
Human papillomavirus (HPV) infection with high-risk types has been shown to be a necessary factor in the development of cervical cancer. HPV DNA may be detected in virtually all cases of cervical cancer.
Not all of the causes of cervical cancer are known. Several other contributing factors have been implicated.
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Causes for cervical cancer: human papillomavirus (HPV) infection, HIV infection. chlamydia infection. stress and stress-related disorders. dietary factors. hormonal contraception. multiple pregnancies. exposure to the hormonal drug
diethylstilbestrol (DES) . Smoking. family history of cervical cancer. There is a possible genetic risk associated
with HLA-B7.
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Risk groups for cervical cancer: Young age at first coitus(20years) Multiple sexual partners. Young age at first pregnancy. High parity . Low socioeconomic state. Smoking.
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Pathology
Squamous cell carcinoma from squamo-columnar junction comprise approximately (80–85%) of cervical cancers.
Adenocarcinomas from the columnar cells inside the cervical canal
Cancer may appear as a fun gating, cauliflower – like growth which may completely fill the vagina or more commonly as an ulcer on the cervix. Cancer may expand cervix into barrel shaped.
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Cervical cancers can spread by: *Direct Spread may be to cervical
stroma, corpus, vagina, bladder and parametrium.
*Lymphatic spread to pelvic and then para-aortic lymph nodes
*Hematogenous spread particularly to lungs, liver, and bone.
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Clinical presentations
Signs and symptoms a symptomatic:the early stages of cervical cancer may be
completely asymptomatic. Vaginal bleeding, contact bleeding or (rarely) profuse vaginal discharge . cervical mass . moderate pain Symptoms of local spread :fistula formation (leak age of urine
or feces. Symptoms of distant metastases may be present as enlarged
inguinal and supraclavicular L.N. metastases in the abdomen, lungs or else where in case of advanced disease.
Systemic manifestation of advanced malignancy as: loss of appetite, weight loss, fatigue, pelvic pain, back pain, leg pain, single swollen leg, heavy bleeding from the vagina, leaking of urine or feces from the vagina, and bone fractures.
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symptoms
1.Abnormal vaginal bleeding: *Post-coital bleeding. *Inter-menstrual bleeding. *Menorrhagia. (Some times) *Post menopausal bleeding. *Vaginal bleeding in pregnancy. 2. offensive vaginal discharge which may be blood
stained. 3. Pain. indicates extension of the growth beyond the
limits of the cervix. 4. Leg swelling. 5. Urinary frequency. 6. Incontinence of urine and some times of faeces may
occur. 7. bowel changes 8. malaise and weight loss.
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Signs In early-stage cervical cancer, physical
examination findings can be relatively normal. *As the disease progresses, the cervix may
become abnormal in appearance, with nodule, ulcer, or mass. Enlarged cervix hard and barrel shaped.
*There is free bleeding on examination and offensive watery discharge.
*Mobility of cervix varies and eventually become fixed.
* Bimanual examination findings often reveal pelvic metastasis.
*Rectal examination which is essential to determine the extent of involvement.
*Pyometra occurs occasionally, causing uterine enlargement.
*There may be enlarged inguinal or supra-clavicular lymph nodes, oedema of legs, ascitis, pleural effusion, or hepatomegally.
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Differential diagnosis
1.Cervicitis. 2.Cervical ectropion. 3.Endometrial carcinoma. 4.Pelvic inflammatory disease (PID). 5.Vaginal cancer
6.Metastatic cancer to cervix (rare). 7.Tuberculosis 8.Syphilitic chancre 9.Choriocarcinoma.
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Investigations
Diagnosis should be based on histology and appropriate biopsies.
After the diagnosis is established, investigation which needed are:
Complete blood cell count Renal functions test Hepatic functions test Imaging Studies: for staging Chest radiograph should be obtained to help rule
out pulmonary metastasis. CT scan of the abdomen and pelvis is performed to
look for metastasis in the liver, lymph nodes, or other organs and to help rule out hydronephrosis/ hydroureter.
Barium enema (sometimes). Intravenous urogram.
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Staging
Clinical Staged Disease Physical Exam Blood Work Cystoscopy Proctoscopy IVP
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Stage 0 - full-thickness involvement of the epithelium without invasion into the stroma (carcinoma in situ)
Stage I - limited to the cervix IA - diagnosed only by microscopy; no visible lesions
IA1 - stromal invasion less than 3 mm in depth and 7 mm or less in horizontal spread
IA2 - stromal invasion between 3 and 5 mm with horizontal spread of 7 mm or less
IB - visible lesion or a microscopic lesion with more than 5 mm of depth or horizontal spread of more than 7 mm IB1 - visible lesion 4 cm or less in greatest dimension IB2 - visible lesion more than 4 cm
Stage II - invades beyond cervix IIA - without parametrial invasion, but involve upper 2/3 of
vagina IIB - with parametrial invasion
Stage III - extends to pelvic wall or lower third of the vagina IIIA - involves lower third of vagina IIIB - extends to pelvic wall and/or causes hydronephrosis or
non-functioning kidney IVA - invades mucosa of bladder or rectum and/or extends
beyond true pelvis IVB - distant metastasis
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Stage 0 carcinoma-in-situ Stage I the tumor is confined to the cervix IA microinvasive disease, with the lesion not
grossly visible: no deeper than 5 mm and no wider than 7 mm
IA1 invasion <3 mm and no wider than 7 mm IA2 invasion >3 mm but <5 mm and no wider
than 7 mm IB larger tumor than in IA or grossly visible,
confined to cervix IB1 clinical lesion no greater than 4 cm IB2 clinical lesion greater than 4 cm
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Stage II extends beyond the cervix, but does not involve the pelvic side wall or lowest third of the vagina
IIA involvement of the upper 2/3 of vagina, without lateral extension into the parametrium
IIB lateral extension into parametrial tissue
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Stage III involves the lowest third of the vagina or pelvic side wall, or causes hydronephrosis
IIIA involvement of the lowest third of the vagina
IIIB involvement of pelvic side wall or hydronephrosis
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Stage IV extensive local infiltration or has spread to a distant site
IVAinvolvement of bladder or rectal mucosa
IVBdistant metastases
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Treatment of Early Disease Conization or simple hysterectomy
(removal of the uterus) - microinvasive cancer
Radical hysterectomy - removal of the uterus with its associated connective tissues, the upper vagina, and pelvic lymph nodes. Ovarian preservation is possible.
Chemoradiation therapy
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Factors that influence the mode of treatment include:
1. Stage and type of lesion. 2. Age of patient. 3. Health status. The treatment of cervical cancer
frequently requires a multidisciplinary approach.
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1. Surgery should only be considered an option for early
disease (stage 1 and stage 11a). 2. Radiation The standard treatment of cervical cancer may
involve: 1. surgery or 2. radiotherapy or 3. a combination of both. Early cervical cancers (stage I and IIA) may be
treated by either procedure. Radiotherapy is the treatment of choice once the disease has spread beyond the confines of the cervix and vaginal fornices, when surgery is not effective.
Stage Ib2-IVa
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1. Surgery *The standered surgical procedure of
cervical carcinoma is a Wertheim's radical abdominal hysterectomy which involves removal of the uterus, paracervical tissue, and upper vagina and pelvic lymph nodes.
Early microinvasive disease can be
treated by cone biopsy or excisional treatment alone .
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Complications of radical hysterectomy:
The most frequent complication of radical hysterectomy is:
1. Urinary dysfunction 2. Hemorrhage 3. Infection. 4. Bowel obstruction. 5. Bladder and rectovaginal fistulas.
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2. Radiation Can be used for all stages. Once the disease has
spread outside cervix, radiotherapy is the mainstay of treatment.
Radiotherapy of cervical cancer may often involve a combination of:
A. external radiotherapy (for whole pelvis radiation)
B. transvaginal intracavitary irradiation (to the central part of the disease)
Palliative radiation often is used individually to control bleeding, pelvic pain, or urinary or partial large bowel obstructions from pelvic disease.
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Complications from radiation 1. Acute adverse effect: A. gastrointestinal effects include
diarrhea, abdominal cramping, rectal discomfort, or bleeding.
B. Cystourethritis can occur, which leads to dysuria, frequency, and nocturia.
2. Late sequelae of radiation usually appear 1-4 years after treatment. The major sequelae include rectal or vaginal stenosis, small bowel obstruction, malabsorption, and chronic cystitis.
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Symptoms of Recurrence
Weight loss, fatigue and anorexia Abnormal vaginal bleeding Pelvic pain Unilateral leg swelling or pain Foul discharge Signs of distant metastases NOTE: must distinguish radiation
side effects from recurrent cancer
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Management of Recurrence Chemoradiation may be curative or
palliative, especially in women who have not received prior radiation therapy.
Isolated soft tissue recurrence may occasionally be treated by resection with long-term survival.
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CERVICAL CANCER DURING PREGNANCY
Prior to 24 weeks: the treatment recommended is the
same as for women who are not pregnant.
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after 24 weeks: When cancer is detected at the time of
fetal viability, radical Caesarean hysterectomy can be offered or the fetus
can be delivered and therapy instituted thereafter.
The route of delivery has traditionally been Caesarean section, though this is more
related to the possibility of increased bleeding, rather than the older concept of spread of disease if the vaginal route is chosen.
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Prognosis
FIVE YEAR SURVIVAL RATES FOR CERVICAL CANCER
Stage I 80% Stage II 65% Stage III 30% Stage IV 15%
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