Consultant, Gynaecologic Oncology and Gynaecology Laparoscopic and Robotic Surgery, Fortis Hospital, Yeshwanthpur, Bangalore
Part 4 of 13 in Overview of Gynaecological Cancers
Reading an Abnormal Pap Smear: When to Biopsy, When to Just Watch
April 26, 2026
Not every abnormal Pap smear needs the same response, and getting the escalation ladder right avoids both overtreatment and missed disease.
Low-grade versus high-grade lesions
CIN 1, a low-grade squamous intraepithelial lesion, usually needs no treatment at all and is simply observed if the HPV DNA test is negative. CIN 2 and CIN 3, both high-grade lesions, are different: 30 percent progress to invasive disease within 10 years, and 1 percent already have an unsuspected invasion at the time they're found, so both need active treatment and regular follow-up.
The screening schedule
Pap smears start at 21 for sexually active patients and continue every 3 years. HPV DNA testing starts later, at 30, because most sexually active people in their twenties have some form of transient HPV infection that would otherwise cause unnecessary alarm; once started, it's repeated every 5 years, alone or combined with a Pap smear as a co-test. Screening continues to age 65.
What happens after an abnormal result
Any abnormal Pap smear warrants colposcopy, with or without biopsy depending on the modified Swede or Reid score the centre uses. If a lesion is already visible on examination, the Pap smear step is skipped entirely in favour of a direct punch biopsy. Excisional procedures such as LLETZ and cold knife conisation serve as both diagnosis and treatment for pre-invasive disease, and are fertility-sparing, which matters for younger patients.
This guide is based on a live Jivo Masterclass — Dr. Punyashree R M taught doctors across Africa on April 26, 2026.
FROM THE LIVE Q&A
Dr. Isaya (Tanzania)
Which technique do you recommend for sentinel lymph node biopsy?
Dr. Punyashree R M
We use ICG dye and do the procedure robotically or laparoscopically with a 4K camera using the Firefly technique. We always open the retroperitoneal spaces first and get everything ready before injecting, because if there's bleeding during dissection after injecting, you won't be able to locate the sentinel node properly. If you're implementing this for the first time, do a pilot study of at least 25 cases each for endometrial and cervical cancer before using it as your standard method.
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Frequently Asked Questions
What are the post-operative morbidities associated with radical hysterectomy with lymph node dissection?▼
The most common complication is urinary issues, in about one or two out of every hundred patients we operate on, because we try carefully to identify and spare the inferior hypogastric nerve. Unlike axillary lymph node dissection, we don't see lymphoedema with the same frequency after pelvic lymph node dissection. We also follow the ERAS protocol, enhanced recovery after surgery, ambulating the patient the same day and starting oral intake within hours.
What are the preventive measures for PCOS?▼
PCOS is a lifestyle disease. If you correct the lifestyle, your hormones should be under control. We explain to patients what's causing the imbalance rather than putting them on hormonal pills upfront, and give them 3 to 4 months to work on diet, exercise, stress management and sleep, alongside antioxidant medications. 60 to 70 percent of our patients come back at the end of 3 months saying they're having regular cycles.
Is fertility-sparing treatment appropriate for ovarian cancer?▼
Fertility-sparing treatment is done only if the lady desires fertility, the disease is early, confined to one single ovary, with no peritoneal deposits and no malignant cells in the ascites. Even at stage 1B we'd do a diagnostic laparoscopy to check the other ovary, because imaging might miss small deposits. For germ cell tumours we always do fertility-sparing surgery because they're highly chemosensitive; for other tumours the decision has to be tailor-made.
How do we manage advanced stage cervical cancer?▼
If it's an advanced stage, stage 3 or 4, treatment is usually chemotherapy with radiation therapy. Squamous cell carcinomas are radiosensitive, and chemotherapy is given as a radiosensitiser to get a better response. If there's stage 4 disease with distant metastasis, systemic therapy is needed. Even after this, if there's residual disease and the patient's performance status is good, we'd still go back and remove the residual disease.
Which technique do you recommend for sentinel lymph node biopsy?▼
We use ICG dye and do the procedure robotically or laparoscopically with a 4K camera using the Firefly technique. We always open the retroperitoneal spaces first and get everything ready before injecting, because if there's bleeding during dissection after injecting, you won't be able to locate the sentinel node properly. If you're implementing this for the first time, do a pilot study of at least 25 cases each for endometrial and cervical cancer before using it as your standard method.
Does CIN 1 need treatment?▼
No. CIN 1, a low-grade squamous intraepithelial lesion, usually needs no treatment at all and is simply observed if the HPV DNA test is negative.
Why do CIN 2 and CIN 3 need active treatment?▼
Because 30 percent of these high-grade lesions progress to invasive disease within 10 years, and 1 percent already have an unsuspected invasion at the time they're found.
At what age should Pap smear and HPV DNA screening start?▼
Pap smears start at 21 for sexually active patients and continue every 3 years. HPV DNA testing starts later, at 30, because most sexually active people in their twenties have some form of transient HPV infection that would otherwise cause unnecessary alarm.
What happens after an abnormal Pap smear?▼
It warrants colposcopy, with or without biopsy depending on the modified Swede or Reid score the centre uses. If a lesion is already visible on examination, the Pap smear step is skipped in favour of a direct punch biopsy.
In This Series: Overview of Gynaecological Cancers
- 1.Overview of Gynaecological Cancers
- 2.Cervical Cancer: The Only Cancer That Can Be Eliminated Worldwide
- 3.Why India's HPV Vaccine Costs a Fifth of Gardasil
- 4.Reading an Abnormal Pap Smear: When to Biopsy, When to Just Watch
- 5.Endometrial Cancer Is the Fastest-Rising Cancer in the World
- 6.The Molecular Subtypes That Now Decide Endometrial Cancer Treatment
- 7.When an IVF Patient's Endometrial Biopsy Comes Back Abnormal
- 8.Ovarian Cancer: Why It's Called the Silent Killer
- 9.Why Tubal Ligation Cuts Ovarian Cancer Risk by 64%
- 10.Fertility-Sparing Surgery for Ovarian Cancer: Who Actually Qualifies
- 11.Vulvar Cancer: A Diagnosis Many Women Delay Reporting
- 12.How Sentinel Lymph Node Mapping Actually Works
- 13.Why Nerve-Sparing Radical Hysterectomy Has Fewer Complications Than You'd Expect