Cervical Cancer

What is Cervical Cancer?

Cervical cancer is a type of malignancy that originates in the cervix (the lower part of the uterus that connects to the vagina). It occurs when abnormal cells on the cervix grow and multiply uncontrollably, invading surrounding tissues and potentially spreading to other body parts. Cervical cancer typically develops slowly over time, often beginning as precancerous changes in the cervical cells, known as dysplasia, before progressing to invasive cancer. 

What Are the Types and Stages of Cervical Cancer?

Here are the types and stages of cervical cancer:

Types of Cervical Cancer

• Squamous Cell Carcinoma (SCC): Originates in the squamous cells covering the cervix (70-80% of cases).

• Adenocarcinoma: Originates in the epithelial cells of the cervix (20-30% of cases).

• Adenosquamous Carcinoma: Combination of SCC and adenocarcinoma.

• Small Cell Carcinoma: Aggressive, fast-growing type of cervical cancer.

• Other rare types are glassy cell carcinoma, mucoepidermoid carcinoma, and papillary serous carcinoma.

Stages of Cervical Cancer

Stage I: Cancer confined to the cervix

• Stage IA: Cancer only in cervical cells.

• Stage IB: Cancer invades cervical tissue.

Stage II: Cancer spreads beyond the cervix but within the pelvis

• Stage IIA: Cancer spreads to the vagina.

• Stage IIB: Cancer spreads to the parametria.

Stage III: Cancer spreads to the pelvic wall or lower third of the vagina

• Stage IIIA: Cancer spreads to the lower third of the vagina.

• Stage IIIB: Cancer spreads to the pelvic wall.

Stage IV: Cancer spreads to distant organs

• Stage IVA: Cancer spreads to the bladder or rectum.

• Stage IVB: Cancer spreads to distant organs (e.g., lungs, liver).

What Causes Cervical Cancer?

Cervical cancer is primarily caused by the Human Papillomavirus (HPV). Furthermore, certain risk factors can increase the likelihood of developing cervical cancer. These include: 

• Genetic predisposition

• Early sexual activity (before 18 years)

• Multiple sexual partners

• History of sexually transmitted infections (STIs)

• Weakened immune system (HIV/AIDS, organ transplant)

• Smoking and secondhand smoke

• Family history of cervical cancer

• Previous cervical cancer or precancerous lesions

• Inadequate cervical cancer screening

• Certain contraceptive methods (long-term hormonal birth control)

• Poor diet and lack of physical activity

• Age (peak incidence between 35-55 years)

• Exposure to diethylstilbestrol (DES) in utero

• Radiation therapy to the pelvis

• Cervical trauma or injury

What Are the Symptoms of Cervical Cancer?

Symptoms of cervical cancer can vary depending on the stage and severity of the disease. Here are the common symptoms:

Early-Stage Symptoms (Stages I-II)

Abnormal vaginal bleeding

• Between menstrual periods

• After intercourse

• After menopause

• Heavy or prolonged menstrual bleeding

Unusual vaginal discharge

• Thick, foul-smelling, or bloody

• Increased amount

Pelvic pain or discomfort

• Lower abdominal pain

• Pain during intercourse

Abnormal Pap test results

Advanced-Stage Symptoms (Stages III-IV)

Increased vaginal bleeding

1. Heavy bleeding

2. Constant spotting

Pelvic pain or pressure

1. Severe abdominal pain

2. Pain radiating to legs or back

Urinary symptoms

1. Frequent urination

2. Blood in urine

3. Difficulty urinating

Bowel symptoms

1. Diarrhea

2. Constipation

3. Blood in stool

Weight loss

Fatigue

Loss of appetite

Swelling in legs or ankles

Other Symptoms

• Back pain

• Leg pain

• Difficulty walking

• Abdominal swelling

• Fever

• Weakness

Symptoms of Metastasis (Cancer Spread)

• Coughing or difficulty breathing (lung metastasis)

• Abdominal pain or swelling (liver metastasis)

• Bone pain or weakness (bone metastasis)

• Neurological symptoms (brain or spinal cord metastasis)

How is Cervical Cancer Diagnosed?

Cervical cancer is diagnosed through a combination of the following methods:

Physical Examination 

• Pelvic Examination: Manual examination of the cervix, vagina, and uterus.

• Cervical Inspection: Visual examination of the cervix.

Screening Tests

• Pap Test (Pap Smear): Examines cervical cells for abnormal changes.

• Human Papillomavirus (HPV) Test: Detects high-risk HPV types that can cause cervical cancer.

Diagnostic Tests

• Colposcopy: Visual examination of the cervix with a specialized microscope.

• Biopsy: Removal of cervical tissue for laboratory analysis.

• Endocervical Curettage (ECC): Scraping of cervical lining for cell analysis.

• Imaging Tests (CT, MRI, PET): Evaluate cancer spread.

Staging Tests

• Cone Biopsy: Removes a cone-shaped sample of cervical tissue.

• Lymph Node Biopsy: Examines lymph nodes for cancer spread.

• Chest X-ray: Evaluates lung metastasis.

Laboratory Tests

• Histopathology: Examines biopsy tissue for cancer cells.

• Molecular Testing: Identifies specific genetic mutations.

How is Cervical Cancer Treated?

Here's an elaboration of the treatment options for cervical cancer according to stages:

Stage I (Cancer confined to the cervix)

Surgery

·          

• Hysterectomy (removal of uterus and cervix)

• Radical trachelectomy (removal of the cervix, upper vagina, and surrounding tissue)

• Cone biopsy or LEEP (loop electrosurgical excision procedure)

Radiation Therapy

·          

• External Beam Radiation Therapy (EBRT)

• Brachytherapy (internal radiation)

Chemotherapy

·          

• Cisplatin-based combinations (optional)

• Fertility-Sparing Treatments:

• Radical trachelectomy

• Cervical conization

Stage II (Cancer spreads to the vagina or parametria)

Surgery

·          

• Radical hysterectomy

• Pelvic lymphadenectomy (removal of lymph nodes)

Radiation Therapy

·          

• EBRT + brachytherapy

Chemotherapy·          

• Cisplatin-based combinations

Combination Therapy

·          

• Surgery + Radiation

• Radiation + chemotherapy

Stage III (Cancer spreads to the pelvic wall or lower third of the vagina)

Radiation Therapy

·          

• EBRT + brachytherapy

Chemotherapy

·          

• Cisplatin-based combinations

• Paclitaxel + carboplatin

Combination Therapy

·          

• Radiation + chemotherapy

Palliative Care

·          

• Symptom management

• Pain relief

Stage IV (Cancer spreads to distant organs)

Palliative Care

·          

• Symptom management

• Pain relief

Chemotherapy

·          

• Cisplatin-based combinations

• Paclitaxel + carboplatin

Immunotherapy

·          

• Pembrolizumab (Keytruda)

• Nivolumab (Opdivo)

Clinical Trials

·          

• Investigational treatments

• Experimental therapies

How Can You Prevent Cervical Cancer?

Here's a concise list of cervical cancer prevention:

Primary Prevention

• HPV vaccination (Gardasil, Cervarix)

• Practice safe sex (condom use)

• Limit sexual partners

• Avoid early sexual activity (before 18)

Secondary Prevention

• Regular cervical cancer screening (Pap test, HPV test)

• Follow recommended screening guidelines

Lifestyle Changes

• Quit smoking

• Maintain healthy weight

• Exercise regularly

• Balanced diet

Additional Measures

• Get tested for HPV

• Use condoms consistently

• Avoid sexual contact with someone who has HPV

Recommended Screening Guidelines

• Ages 21-29: Pap test every three years

• Ages 30-65: Pap and HPV test every five years

Vaccination Recommendations

• Girls aged 11-12

• Boys aged 11-12

• Women up to age 26

• Men up to age 21

Conclusion 

Cervical cancer is a preventable and treatable disease, yet it remains a significant global health concern, affecting millions of women worldwide. Through education, vaccination, and regular screening, the risk of cervical cancer can be dramatically reduced. The HPV vaccine and Pap testing have proven to be effective tools in preventing and detecting cervical cancer. Early detection and treatment can improve survival rates and quality of life. By prioritizing cervical health, promoting awareness, and increasing access to healthcare services, we can reduce the burden of cervical cancer and save lives.

References 

1. https://www.ncbi.nlm.nih.gov/books/NBK65901/#:~:text=Long%2Dlasting%20(persistent)%20infection,some%20point%20in%20their%20lives.

2. https://www.ncbi.nlm.nih.gov/books/NBK431093/

3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7797226/

4. https://pubmed.ncbi.nlm.nih.gov/28613745/

5. https://www.ncbi.nlm.nih.gov/books/NBK65985/

6. https://www.ncbi.nlm.nih.gov/books/NBK343648/