Infectious Disease · PANCE / PANRE

HPV Genital Warts (Condyloma acuminatum)

Written & clinically reviewed by Ryan Busch, PA-C · Updated August 2026 · Report an error

Soft, exophytic anogenital warts caused by low-risk HPV types 6 and 11; high-risk types (16, 18) drive cervical, anal, oropharyngeal cancers — vaccination is highly effective.

Also known as: HPV, human papillomavirus, genital warts, condyloma acuminatum, venereal warts

Overview

Anogenital warts caused predominantly by HPV types 6 and 11 (low-risk for cancer). Distinct from oncogenic HPV types (16, 18 among others) responsible for cervical, anal, vulvar, vaginal, penile, and oropharyngeal cancers.

Epidemiology

HPV is the most common STI in the US — most sexually active adults will be infected. Genital warts affect ~1% of sexually active adults at any time. HPV-attributable cancers cause ~36,000 US cases yearly. HPV vaccine (now 9-valent covering types 6/11/16/18/31/33/45/52/58) has dramatically reduced incidence in vaccinated cohorts.

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Question 1Infectious DiseaseMedium
A 4-year-old girl has a 4-month history of progressive hoarseness and intermittent stridor. She was born vaginally to a mother who had active genital warts at the time of delivery. Direct laryngoscopy reveals multiple friable, cauliflower-like papillomatous lesions involving both true vocal cords. Which of the following is the most appropriate first-line treatment?
  • ASystemic acyclovir therapy
  • BOral prednisone taper course
  • CSurgical microdebridement
  • DInhaled racemic epinephrine
Reveal answer & full explanation
Correct answer: C — Surgical microdebridement
  • ASystemic acyclovir therapy
  • BOral prednisone taper course
  • CSurgical microdebridement✓
  • DInhaled racemic epinephrine

Why surgical microdebridement is correct

  • Juvenile-onset recurrent respiratory papillomatosis (JoRRP) is caused by HPV 6 or 11 acquired during vaginal delivery from a mother with genital warts
  • It is managed primarily with repeated surgical debulking using a CO2 laser or powered microdebrider to maintain a patent airway and preserve voice
  • There is no curative medical therapy; most children require multiple procedures per year
  • Adjuvant intralesional cidofovir or systemic bevacizumab is added for aggressive or distally spreading disease
  • HPV vaccination of the mother before pregnancy and of the child reduces incidence and may slow progression

Why the others are wrong

  • Systemic acyclovir therapy — treats herpesvirus (HSV/VZV) infections and has no activity against HPV; buzzword-matching a viral airway lesion to an antiviral
  • Oral prednisone taper course — not used for RRP and does not address the obstructive papillomas, while carrying growth and immune side effects in children; anchoring on steroids as a generic airway anti-inflammatory
  • Inhaled racemic epinephrine — used for acute croup or transient airway edema; provides only short-lived vasoconstriction and does not address the underlying papillomatous obstruction; premature closure on a stridor-relieving measure
Question 2Infectious DiseaseEasy
A 3-year-old child is brought to clinic for evaluation of progressive hoarseness and noisy breathing over 6 months. Mother reports the child was born vaginally; she had untreated genital warts during pregnancy. On exam the child has a weak, hoarse cry and biphasic stridor with mild retractions. Direct laryngoscopy shows multiple cauliflower-like exophytic lesions on the true vocal cords. Which of the following is the most likely diagnosis?
  • ARecurrent respiratory papillomatosis
  • BSubglottic infantile hemangioma
  • CBilateral vocal fold immobility
  • DLaryngeal saccular cyst formation
Reveal answer & full explanation
Correct answer: A — Recurrent respiratory papillomatosis
  • ARecurrent respiratory papillomatosis✓
  • BSubglottic infantile hemangioma
  • CBilateral vocal fold immobility
  • DLaryngeal saccular cyst formation

Why Recurrent respiratory papillomatosis is correct

  • Recurrent respiratory papillomatosis (RRP) is caused by HPV types 6 and 11 transmitted perinatally from a mother with genital HPV infection during vaginal delivery
  • The juvenile form typically presents between ages 2 and 5 with progressive hoarseness, weak cry, and stridor
  • Direct laryngoscopy reveals friable cauliflower-like papillomas most commonly on the true vocal cords
  • Treatment is repeated surgical debulking (CO2 laser or microdebrider), with adjuvant intralesional cidofovir or systemic bevacizumab for aggressive disease

Why the others are wrong

  • Subglottic infantile hemangioma — presents in the first 6 months with biphasic stridor and may have a cutaneous beard-distribution hemangioma; endoscopy shows a smooth submucosal red mass, not cauliflower lesions (confused-with vascular lesion)
  • Bilateral vocal fold immobility — causes biphasic stridor and a weak cry but shows immobile cords without exophytic lesions on laryngoscopy, not verrucous papillomas (anchoring on stridor)
  • Laryngeal saccular cyst formation — presents with a smooth submucosal supraglottic cystic swelling and muffled cry, not cauliflower-like exophytic lesions on the true cords (anchoring on hoarseness)
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Risk factors

  • Early age at first intercourse, multiple lifetime partners
  • Smoking (impairs clearance and accelerates progression)
  • Immunocompromise (HIV, transplant) — more extensive disease, higher recurrence
  • Other STIs
  • Lack of HPV vaccination

Pathophysiology

HPV is a non-enveloped DNA virus that infects basal keratinocytes through microabrasions. Low-risk types (6, 11) cause epithelial proliferation → warts. High-risk types (16, 18) integrate viral DNA, with E6 and E7 oncoproteins inactivating p53 and Rb → uncontrolled cell cycle progression and malignant transformation over years to decades.

Clinical presentation

Symptoms

  • Soft, flesh-colored, pink, or gray cauliflower-like (verrucous) papules on genital mucosa, perianal area, or proximal anal canal
  • Often asymptomatic; may cause pruritus, bleeding with friction, dyspareunia
  • Warts may coalesce into large plaques (Buschke-Lowenstein tumor in immunocompromised)
  • Oral/laryngeal lesions possible with oral-genital exposure
  • High-risk HPV usually asymptomatic until precancer or cancer develops — found on Pap/HPV screening

Signs / physical exam

  • Visible exophytic warts on external genitalia, vagina, cervix, urethra, perianal, anal canal
  • Cervical involvement may require colposcopy/biopsy
  • Acetowhitening (5% acetic acid applied to lesion) — historical adjunct; non-specific
  • Speculum exam for cervical/vaginal lesions

Classic findings

Soft, fleshy, cauliflower-shaped exophytic anogenital papules in a sexually active adult — condyloma acuminatum. Distinguish from flat moist condyloma lata of secondary syphilis.

Differential diagnosis

  • Condyloma lata (secondary syphilis) — Moist, flat, gray-white plaques in intertriginous areas; RPR positive
  • Molluscum contagiosum — Dome-shaped, umbilicated papules; poxvirus
  • Skin tags (acrochordon) — Pedunculated, smooth, soft; not infectious
  • Vestibular papillomatosis — Normal variant in women — symmetric, soft frond-like papillae of the vulvar vestibule
  • Pearly penile papules / Fordyce spots — Normal anatomic variants — rows of small dome-shaped papules at coronal sulcus / sebaceous glands
  • Bowenoid papulosis / Buschke-Lowenstein — HPV-related; biopsy if pigmented, ulcerated, or rapidly growing
  • Squamous cell carcinoma — Indurated, ulcerated, bleeding; biopsy any concerning lesion

Diagnostic workup

Diagnostic criteria

Clinical diagnosis for typical anogenital warts; histology for atypical lesions.

Labs

  • Clinical diagnosis for typical warts; biopsy only for atypical, pigmented, ulcerated, or recurrent lesions
  • Cervical cancer screening per ASCCP guidelines:
  • • Ages 21-29: cytology every 3 years
  • • Ages 30-65: HPV testing alone every 5 years (preferred) OR co-testing (Pap + HPV) every 5 years OR cytology alone every 3 years
  • • Discontinue at 65 if adequate prior screening and not high-risk
  • Anal Pap screening: HIV-positive MSM and other high-risk populations; ANCHOR trial supports treatment of HSIL
  • Test for concurrent STIs
  • HPV typing not used clinically for wart treatment

Imaging

  • Anoscopy / high-resolution anoscopy for anal canal lesions
  • Colposcopy for cervical abnormalities

Diagnostic algorithm

HPV Type CategoryExamplesMajor DiseasesVaccine Coverage (Gardasil 9)
Low-risk6, 11Genital warts, RRPYes (6, 11)
High-risk16, 1870% of cervical cancers; anal, oropharyngeal CAYes (16, 18)
Other high-risk31, 33, 45, 52, 58Additional cervical and anogenital CAYes (all 5)
HPV type categories: clinical disease and 9-valent vaccine coverage.

Treatment

First-line

  • Patient-applied (self-administered):
  • • Imiquimod 3.75% or 5% cream — applied at bedtime several times/week up to 16 weeks; immune modulator
  • • Podofilox 0.5% solution/gel — applied BID × 3 days, 4 days off, up to 4 cycles
  • • Sinecatechins 15% ointment (green tea catechins) — TID up to 16 weeks
  • Provider-applied:
  • • Cryotherapy with liquid nitrogen — every 1-2 weeks until clearance
  • • Trichloroacetic acid (TCA) 80-90% — weekly application
  • • Surgical removal (excision, electrosurgery, laser ablation) for large or refractory lesions
  • Cervical and intra-anal lesions require specialty management
  • No therapy is uniformly effective; recurrence common; choice based on lesion size/location, patient preference, and cost

Second-line / adjunct

  • Combination or sequential therapy for refractory disease
  • Intralesional interferon — refractory cases
  • Cidofovir gel — experimental
  • HPV vaccine (Gardasil 9) — primary prevention, NOT treatment of existing infection (but recommended through age 26 universally and through age 45 with shared decision-making per ACIP)

Complications

  • Recurrence (common with all therapies)
  • Psychosocial distress, sexual dysfunction
  • Progression of high-risk HPV to cervical, anal, vulvar, vaginal, penile, or oropharyngeal cancer
  • Buschke-Lowenstein giant condyloma (locally destructive)
  • Recurrent respiratory papillomatosis in infants of mothers with active genital HPV at delivery (rare)

PANCE pearls

  • HPV vaccine recommended routinely for ages 9-12 (start as early as 9), catch-up to age 26, and shared decision-making 27-45 (ACIP 2019).
  • Vaccine prevents but does not treat existing infection — vaccinate before sexual debut for maximal benefit.
  • Cervical screening guidelines (ASCCP/USPSTF): primary HPV testing every 5 years (ages 30-65) is now the preferred strategy.
  • Wart treatments are destructive, not curative — recurrence often reflects residual subclinical infection.
  • Genital warts caused by low-risk types (6, 11) do not progress to cancer — but high-risk coinfection is common; screen the cervix appropriately.

References

  • CDC 2021 — Sexually Transmitted Infections Treatment Guidelines, 2021 (MMWR Recommendations and Reports)
  • ACIP 2019 — Meites et al., Human Papillomavirus Vaccination for Adults: Updated Recommendations of the Advisory Committee on Immunization Practices (MMWR)
  • ASCCP 2019 — Risk-Based Management Consensus Guidelines for Abnormal Cervical Cancer Screening Tests and Cancer Precursors

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Differentials & related conditions

Molluscum ContagiosumSquamous Cell Carcinoma

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