Can you provide a microscopic image of human papillomavirus‑infected epithelial cells?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: March 2, 2026 • View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

I Cannot Provide Medical Images

I am unable to display, generate, or retrieve microscopic images of HPV-infected cells. However, I can describe the characteristic microscopic features that pathologists look for when identifying HPV infection in tissue specimens.

Characteristic Microscopic Features of HPV-Infected Epithelial Cells

Koilocytosis (Hallmark Finding)

Koilocytes are the pathognomonic cellular feature of HPV infection, characterized by a large perinuclear vacuole (halo) surrounding an acentric, hyperchromatic nucleus. 1

  • The perinuclear halo appears as a clear zone around the nucleus, creating the classic "halo cell" appearance 1
  • The nucleus is displaced to the periphery and appears darkly stained (hyperchromatic) 1
  • Koilocytes are found in the differentiated layers of the squamous epithelium 1
  • Both low-risk (HPV 6,11) and high-risk (HPV 16,18) types produce koilocytosis 1

Nuclear Changes in HPV Infection

  • Nuclear enlargement: Superficial epithelial cells show nuclear diameters at least twice that of basal nuclei 2
  • Nuclear membrane irregularity: The nuclear border becomes irregular and wrinkled 3
  • Hyperchromasia: Nuclei appear darker due to increased chromatin density 3
  • Abnormal chromatin distribution: Chromatin clumping and irregular patterns 3
  • Binucleation and multinucleation: Multiple nuclei within a single cell 3, 4

Additional Microscopic Features

  • Karyorrhexis: Nuclear fragmentation is significantly associated with HPV 18 infection 3
  • Perinuclear halos: Correlate quantitatively with HPV viral load 4
  • Increased nuclear-to-cytoplasmic ratio: HPV 18 specifically affects nuclear width and height 3
  • Atypical koilocytes: Cells showing partial koilocytic features may represent regressing HPV infection 4

Important Clinical Context

HPV Can Present Without Classic Koilocytosis

  • HPV infection can manifest as superficial nuclear enlargement alone, without koilocytosis, in approximately 52% of cases 2
  • The positive HPV signal is located predominantly in the enlarged nuclei of superficial epithelial layers 2
  • Vulvar seborrheic keratosis-like lesions are associated with HPV in 72% of cases, despite lacking classic koilocytosis 5

Diagnostic Considerations

  • Typical koilocytes and perinuclear halos correlate with viral load: Higher HPV copy numbers (>271.49) indicate obvious koilocytosis 4
  • Regressing infection: Atypical koilocytes with HPV copy numbers between 58.9-271.49 may represent "regressing koilocytosis" 4
  • HPV type matters: HPV 18 specifically affects karyorrhexis, nuclear membrane irregularity, and nuclear enlargement more than other types 3

Where to Find Images

For actual microscopic images, consult:

  • Pathology textbooks (e.g., Robbins and Cotran Pathologic Basis of Disease)
  • Online pathology image databases (e.g., PathologyOutlines.com, WebPath)
  • Medical education resources from institutions like the College of American Pathologists
  • Published journal articles on cervical cytology and HPV pathology 3, 1, 4, 2

References

2
Research

Superficial nuclear enlargement without koilocytosis as an expression of human papillomavirus infection of the uterine cervix: an in situ hybridization study.

International journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists, 1992

Related Questions

What is the management and treatment for koilocytosis indicative of Human Papillomavirus (HPV) infection?
Can a patient on clozapine 150 mg with an absolute neutrophil count of 13.2 ×10⁹/L, white‑blood‑cell count of 17.1 ×10⁹/L, and an upper respiratory infection safely continue the medication?
What is the appropriate therapeutic and maintenance dosing of vitamin D3 for a 7‑year‑old child with documented vitamin D deficiency?
What is iatrogenic thyrotoxicosis and what are its symptoms?
What is the recommended approach to managing obesity and weight loss in an adult primary‑care patient, including assessment of body‑mass index and obesity‑related comorbidities, lifestyle intervention, pharmacologic options, and criteria for bariatric surgery referral?
How can I obtain a reliable childhood history of attention‑deficit/hyperactivity disorder in an adult who cannot recall their early years?
Should a 78-year-old man with recent recurrent falls and a history of transient ischemic attack receive an urgent non‑contrast head CT?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question