BASIC INFORMATION

• Date & Time: 23-July-2024, 15:00 Indian Standard Time

• Lecture Handout Prepared from the Teaching Session by: Dr. R. K. Mishra

SUMMARY

This lecture provides a comprehensive overview of uterine polyps, a common cause of Abnormal Uterine Bleeding (AUB). The session covers the classification, pathogenesis, and histopathological features of various types of uterine polyps, including endometrial, endocervical, fibroidal, and placental polyps. A detailed discussion on the clinical presentation, diagnostic modalities, and management strategies is presented. Key diagnostic tools such as transvaginal sonography, saline infusion sonography (SIS), and hysteroscopy are explained. The lecture emphasizes that while many polyps are asymptomatic, symptomatic polyps require surgical intervention, with hysteroscopic polypectomy being the current standard of care. It also addresses the indications for removal, causes of recurrence, and the importance of histopathological examination, especially in postmenopausal patients.

KEY KNOWLEDGE POINTS

• Definition and Types: Polyps are pedunculated or sessile growths, primarily benign, classified based on their tissue of origin: endometrial, endocervical, fibroidal, and placental.

• Pathogenesis: Hyperestrogenism is a central etiological factor for endometrial and endocervical polyps. Other risk factors include hormonal replacement therapy, tamoxifen use, obesity, and diabetes.

• Clinical Presentation: Symptoms vary by polyp type. Endometrial polyps are often asymptomatic, whereas cervical and fibroidal polyps commonly present with intermenstrual bleeding, contact bleeding, and offensive vaginal discharge. Fibroidal polyps are uniquely associated with significant pain and anemia.

• Diagnostic Evaluation: Transvaginal sonography (TVS), particularly with color Doppler to identify the "feeder vessel sign," and Saline Infusion Sonography (SIS) are primary non-invasive diagnostic tools. Hysteroscopy is the gold standard for both diagnosis and treatment.

• Management: The definitive treatment for symptomatic polyps is surgical removal. Hysteroscopic polypectomy is the treatment of choice. Dilatation and Curettage (D&C) with polypectomy is a historical alternative.

• Recurrence: The most common reasons for polyp recurrence are incomplete removal, persistence of the underlying hyperestrogenic state, and malignant transformation.

INTRODUCTION

Uterine polyps represent a significant clinical entity within the spectrum of gynecological pathology, categorized under the PALM-COIN classification system for Abnormal Uterine Bleeding (AUB-P). These growths, arising from the endometrium or cervix, are typically benign but can cause distressing symptoms such as irregular bleeding, pain, and infertility, and harbor a potential for malignancy. Understanding the distinct pathophysiology, clinical features, and management approaches for different types of polyps is crucial for effective patient care. This lecture provides postgraduate trainees with a foundational and practical framework for diagnosing and treating uterine polyps, from initial clinical suspicion to definitive surgical management.

LEARNING OBJECTIVES

• To classify uterine polyps based on their origin and pathological features.

• To understand the pathogenesis and risk factors associated with polyp formation, with a focus on hyperestrogenism.

• To differentiate the clinical presentation, signs, and symptoms of endometrial, cervical, and fibroidal polyps.

• To outline the diagnostic pathway, including the roles of ultrasonography, saline infusion sonography, and hysteroscopy.

• To describe the modern surgical management of uterine polyps, emphasizing hysteroscopic polypectomy as the standard of care.

CORE CONTENT

1. Classification and Definition of Polyps

A polyp is a pathological entity defined as a tumorous growth attached to a surface by a pedicle. It can be pedunculated (with a distinct stalk) or sessile (with a broad base). While most uterine polyps are benign, malignancy can occur, either as a de novo event or through secondary malignant transformation of a benign polyp.

1.1. Benign Polyps

• Endometrial Polyp: The most common type, arising from the endometrial lining of the uterine body.

• Endocervical Polyp: Arises from the endocervical glands.

• Fibroidal Polyp (Submucous Myoma Pedunculated): A submucous leiomyoma that has been extruded into the uterine or cervical canal, developing a pedicle in the process.

• Placental Polyp: A retained fragment of placental tissue that organizes with blood clots and projects into the uterine cavity, typically following delivery or abortion.

1.2. Malignant Polyps

Malignancy can be primary (de novo) or secondary, arising from a pre-existing benign polyp.

2. Pathogenesis and Risk Factors

Hyperestrogenism is the primary stimulus for the proliferation of endometrial and endocervical tissue, leading to polyp formation.

• Risk Factors:

  • Hormonal Replacement Therapy (HRT)

  • Tamoxifen therapy

  • Obesity (due to peripheral conversion of androgens to estrogen)

  • Diabetes and Hypertension

  • Increasing patient age

• Cervical Polyps: In addition to hyperestrogenism, chronic irritation from infection (cervicitis) and localized vascular congestion can stimulate the growth of ectocervical polyps.

3. Histopathology and Macroscopic Appearance

3.1. Endometrial Polyp

• Naked Eye Appearance: Typically 1–2 cm, reddish, soft, and single or multiple.

• Microscopic Appearance: The core consists of stromal cells, glands, and thick-walled vascular channels. The surface is lined by endometrial epithelium. The presence of smooth muscle classifies it as an adenoleiomyomatous polyp.

• Malignant Potential: Factors suggesting malignant change include size >10 mm, occurrence in postmenopausal women, and association with new-onset AUB.

3.2. Endocervical Polyp

• Naked Eye Appearance: Small (1–2 cm), single, and brilliantly red due to high vascularity. Often visible protruding from the external cervical os on speculum examination.

• Microscopic Appearance: The stroma contains fibrous connective tissue, numerous small blood vessels, and occasional cervical glands.

3.3. Fibroidal Polyp

• Naked Eye Appearance: Usually single, firm, and pale with a whorled appearance, though the size is variable. The tip is often subject to necrosis, hemorrhage, and infection due to pressure and compromised blood supply.

• Microscopic Appearance: Composed of interlacing bundles of smooth muscle and fibrous tissue (fibromuscular structure), covered by endometrium.

3.4. Placental Polyp

• Naked Eye Appearance: Appears as an organized mass of tissue and blood clot attached to the uterine wall.

4. Clinical Features and Diagnosis

4.1. Endometrial Polyp

• Symptoms: Often asymptomatic and discovered incidentally. May cause AUB, infertility, or miscarriage.

4.2. Cervical Polyp

• Symptoms: Irregular uterine bleeding (spotting), postcoital bleeding, and excessive, often offensive, vaginal discharge.

• Signs: On speculum examination, a small, soft, slippery, reddish, tongue-like projection is visible at or near the external os, attached by a slender pedicle.

4.3. Fibroidal Polyp

• Symptoms: Most symptomatic type.

  • Heavy Bleeding: Intermenstrual or continuous bleeding, often leading to anemia.

  • Pain: Colicky lower abdominal pain due to uterine contractions attempting to expel the polyp.

  • Discharge: Profuse, offensive vaginal discharge due to infection and necrosis.

  • Pressure Symptoms: A dragging sensation or feeling of "something coming down" per vaginam.

• Signs:

  • General Examination: Pallor due to anemia.

  • Per Vaginal Examination: The uterus may feel bulky, and the cervix may be patulous. The polyp's tip may be palpable at the os, or the entire mass may be felt in the vagina.

  • Speculum Examination: The polyp may be visible. Its appearance can be pale or hemorrhagic and necrotic depending on its duration and vascular status.

5. Investigations

• Transvaginal Sonography (TVS): Can identify an intracavitary mass. The "feeder vessel sign" on color Doppler is a characteristic finding, showing a single vessel entering the polyp's pedicle.

• Saline Infusion Sonography (SIS) or Sonohysterography: The gold standard for non-invasive imaging. Saline distends the endometrial cavity, allowing for clear visualization of the polyp, its location, and its attachment.

• Hysteroscopy: The definitive diagnostic tool ("see and treat"). It allows direct visualization of the uterine cavity, confirming the presence, size, and location of the polyp.

6. Treatment

The standard management for symptomatic or suspicious polyps is surgical removal (polypectomy).

• Indications for Removal:

  • Symptomatic polyps (causing AUB, pain, discharge).

  • Infertility.

  • Size >1.5 cm.

  • All polyps in postmenopausal women.

  • Suspicion of malignancy.

• Surgical Techniques:

  • Hysteroscopic Polypectomy: The treatment of choice. It allows for complete removal of the polyp under direct vision, including the base, which is then cauterized to prevent recurrence.

  • Dilatation and Curettage (D&C) with Polypectomy: A traditional method, now considered less effective than hysteroscopy as it is a "blind" procedure and may lead to incomplete removal.

  • Avulsion: Simple twisting and pulling of a visible cervical polyp. The base must be cauterized.

• Histopathological Examination: All removed polyp tissue must be sent for histopathological analysis to rule out malignancy.

SURGICAL PEARLS

• Feeder Vessel Sign: During TVS, actively look for the single feeding artery on color Doppler to differentiate an endometrial polyp from a submucous myoma, which typically has multiple vessels.

• Hysteroscopic Advantage: Always prefer hysteroscopic removal over blind D&C to ensure complete resection of the polyp's base, which is the most critical step in preventing recurrence.

• Postmenopausal Polyps: Treat any polyp in a postmenopausal woman with a high index of suspicion. It must be removed and sent for histology, as the risk of malignancy is higher in this group.

• Fibroidal Polyp Tip: Be aware that the tip of a protruding fibroidal polyp is often necrotic and infected. Handle it gently during removal to avoid dissemination of septic material.

COMPLICATIONS AND THEIR MANAGEMENT

Recurrence of Polyps

Recurrence after polypectomy can occur. The primary reasons are:

• Intraoperative: Incomplete removal of the polyp, especially failure to resect or cauterize its base. This is the most common cause.

• Early Postoperative: Persistence of the underlying etiological cause, such as an uncorrected hyperestrogenic state.

• Late Postoperative: Development of a new polyp or malignant changes in the endometrium.

MEDICOLEGAL AND PATIENT SELECTION CONSIDERATIONS

• Informed consent for polypectomy must include the risk of recurrence and the rare but potential finding of malignancy on histopathology.

• For asymptomatic, premenopausal women with small (<1.5 cm) endometrial polyps, a watch-and-wait approach can be considered, but the patient must be counseled on the symptoms that would necessitate intervention.

• All polyps identified in postmenopausal women warrant removal and histological evaluation due to the increased risk of endometrial hyperplasia or carcinoma.

• Documenting complete removal of the polyp base during hysteroscopy is a crucial aspect of the operative note.

SUMMARY AND TAKE-HOME MESSAGES

• Uterine polyps are a common cause of AUB; their clinical presentation varies significantly based on type, size, and location.

• Fibroidal polyps are the most symptomatic, causing pain, heavy bleeding, and anemia, while endometrial polyps are often asymptomatic.

• Saline Infusion Sonography (SIS) and hysteroscopy are the cornerstone diagnostic modalities.

• Hysteroscopic polypectomy is the gold standard for treatment, offering complete removal under direct vision and reducing recurrence rates.

• Always send removed tissue for histopathology, especially in postmenopausal patients, to exclude malignancy.

MULTIPLE CHOICE QUESTIONS (MCQs)

1. Which of the following is the most common type of benign uterine polyp?

   a) Fibroidal

   b) Endocervical

   c) Endometrial

   d) Placental

2. Hyperestrogenism is a primary risk factor for all the following EXCEPT:

   a) Endometrial polyp

   b) Endocervical polyp

   c) Placental polyp

   d) Endometrial hyperplasia

3. A 48-year-old woman on tamoxifen therapy presents with intermenstrual spotting. What is the most likely diagnosis?

   a) Cervical erosion

   b) Endometrial polyp

   c) Atrophic vaginitis

   d) Adenomyosis

4. On transvaginal sonography, which sign is most characteristic of an endometrial polyp?

   a) Whorled appearance of the myometrium

   b) Multiple small cystic spaces in the myometrium

   c) A single prominent feeding vessel

   d) A poorly defined endometrial-myometrial junction

5. A 35-year-old patient complains of severe, colicky lower abdominal pain similar to labor pains, along with heavy, irregular bleeding. Which diagnosis is most likely?

   a) Small endocervical polyp

   b) Asymptomatic endometrial polyp

   c) Protruding fibroidal polyp

   d) Adenomyosis

6. What is the gold standard for both diagnosis and treatment of uterine polyps?

   a) Transvaginal Sonography (TVS)

   b) Dilatation and Curettage (D&C)

   c) Saline Infusion Sonography (SIS)

   d) Hysteroscopy

7. A fibroidal polyp is histologically composed primarily of:

   a) Endometrial glands and stroma

   b) Fibromuscular tissue

   c) Placental villi and blood clot

   d) Glandular epithelium and vascular channels

8. On speculum examination, an endocervical polyp typically appears:

   a) Pale, firm, and large

   b) Bluish and cystic

   c) Brilliantly red, soft, and small

   d) White and leukoplakic

9. Which of the following symptoms is least likely to be associated with an endocervical polyp?

   a) Postcoital spotting

   b) Offensive vaginal discharge

   c) Severe, colicky abdominal pain

   d) Intermenstrual spotting

10. A "placental polyp" is formed from:

    a) A de novo malignancy

    b) A submucous fibroid

    c) Organized retained products of conception

    d) Hyperplastic endocervical glands

11. What is the most common reason for the recurrence of an endometrial polyp after surgery?

    a) Malignant transformation

    b) Persistence of hyperestrogenism

    c) Incomplete removal of the polyp's base

    d) New polyp formation in a different location

12. In which patient group is surgical removal of any identified polyp mandatory?

    a) Asymptomatic reproductive-age women

    b) Women with small (<1 cm) polyps

    c) Postmenopausal women

    d) Women planning future pregnancy

13. The naked-eye appearance of a fibroidal polyp is typically:

    a) Soft and reddish

    b) Brilliantly red and friable

    c) Pale, firm, with a whorled appearance

    d) Small and translucent

14. Saline Infusion Sonography (SIS) improves diagnostic accuracy by:

    a) Increasing blood flow to the polyp

    b) Distending the endometrial cavity for better visualization

    c) Highlighting malignant cells

    d) Measuring uterine contractions

15. A patient with a protruding fibroidal polyp is most likely to present with which finding on a general examination?

    a) Jaundice

    b) Pedal edema

    c) Pallor

    d) Hypertension

16. An adenoleiomyomatous polyp is an endometrial polyp that contains:

    a) Smooth muscle fibers

    b) Cervical glands

    c) Necrotic tissue

    d) Placental villi

17. Which statement about the management of uterine polyps is TRUE?

    a) D&C is superior to hysteroscopy for complete removal.

    b) Asymptomatic polyps in premenopausal women never require treatment.

    c) Hysteroscopic polypectomy is the current treatment of choice.

    d) All polyps can be managed with hormonal therapy alone.

18. A "sessile" polyp is one that:

    a) Is attached by a long, thin stalk

    b) Has a broad base and no pedicle

    c) Is always malignant

    d) Is located in the cervix

19. Which clinical feature most strongly suggests a malignant change in a known polyp?

    a) Association with offensive discharge

    b) Size greater than 10 mm and postmenopausal status

    c) Presence of colicky pain

    d) A slender, easily visualized pedicle

20. A fibroidal polyp is essentially an extruded:

    a) Intramural fibroid

    b) Subserosal fibroid

    c) Submucous fibroid

    d) Cervical fibroid

MCQ Answers: 1(c), 2(c), 3(b), 4(c), 5(c), 6(d), 7(b), 8(c), 9(c), 10(c), 11(c), 12(c), 13(c), 14(b), 15(c), 16(a), 17(c), 18(b), 19(b), 20(c)

MOTIVATIONAL MESSAGE FROM DR. R. K. MISHRA

In surgery, perfection is not a destination, but a continuous journey fueled by discipline and an insatiable desire to learn. Each procedure is a new lesson; approach it with the mind of a student and the hands of a master.

May your dedication to this noble path bring healing to many and profound satisfaction to you. Keep learning, keep excelling.