Oral Cancer
Verrucous Carcinoma
aka Ackerman Tumour
Well-differentiated low-grade variant of oral SCC with warty exophytic architecture, pushing (not infiltrating) margins and excellent prognosis when adequately excised.
§ figuresFigures (3)
Fig. 1Micrograph of penile verrucous carcinoma. The tumor is characterized by prominent papillomatosis and acanthosis [haematoxylin-eosin stain, original magnification x20].
“Micrograph of penile verrucous carcinoma - 20x” · Prodromos Philippou, Christos Kitsios, Maria Miliatou, Christiana Poullou, and P · CC BY 4.0 · Wikimedia Commons
Fig. 2Micrograph of penile verrucous carcinoma. The tumor front is broad-based and pushes the subepithelial tissues [haematoxylin-eosin stain, original magnification x200].
“Micrograph of penile verrucous carcinoma - 200x” · Prodromos Philippou, Christos Kitsios, Maria Miliatou, Christiana Poullou, and P · CC BY 4.0 · Wikimedia Commons
Fig. 3Low power, showing "pushing" of tumor into underlying tissue. There is lots of scarring and chronic inflammation in the underlying tissue. Pathological and histological images courtesy of Ed Uthman at flickr.
“Verrucous Carcinoma 4 (146950404)” · Ed Uthman from Houston, TX, USA · CC BY 2.0 · Wikimedia Commons
Verified open-access images only, reproduced for education under their stated licences · no AI-generated or illustrative artwork · Verrucous Carcinoma figures pending faculty review.
§ overviewOverview
A non-metastasising well-differentiated variant of squamous cell carcinoma composed of thick, club-shaped keratotic papillae with pushing margins.
§ icdICD Classification
C06.9
§ etiologyEtiology
- 01Chronic tobacco use (particularly smokeless: paan, snuff)
- 02HPV-16/18 detected in some cases
- 03Chronic irritation
§ epidemiologyEpidemiology
1–10% of oral SCC; elderly males; buccal mucosa & mandibular alveolus most common.
§ clinicalClinical Features
- 01Slow-growing exophytic, cauliflower-like, white-warty painless lesion
- 02May cover a large area and cause bone erosion (pressure-type)
- 03Rarely metastasises to lymph nodes
§ differentialDifferential Diagnosis
- 01Verrucous hyperplasia
- 02Proliferative verrucous leukoplakia
- 03Conventional SCC
- 04Papilloma
§ histopathHistopathology
- 01Thick club-shaped rete ridges with abundant keratin
- 02Pushing (broad, blunt) margins — not infiltrative
- 03Minimal cytological atypia — biopsy often reported as 'hyperplasia' unless deep specimen taken
- 04Bulky keratin plugs (keratin cysts)
§ investigationsInvestigations
- 01Deep incisional biopsy including epithelial–connective tissue interface (superficial biopsy misleading)
- 02MRI/CT for bone involvement
§ treatmentTreatment
- 01Wide surgical excision with 1 cm margin — treatment of choice
- 02Neck dissection generally NOT required (nodes rare)
- 03Radiotherapy avoided historically due to reported anaplastic transformation; contemporary evidence limited
- 04Cryotherapy or laser for small lesions
§ complicationsComplications
- 01Local recurrence if margins inadequate (10–20%)
- 02Anaplastic transformation to conventional SCC (5–10%)
§ prognosisPrognosis
5-year survival >80% with adequate excision; better than conventional SCC due to absence of metastases.
§ examKey Examination Points
- 01Take deep biopsy for diagnosis
- 02No need for elective neck dissection
§ revisionQuick Revision Summary
- 01Ackerman tumour · pushing margins · excision only · avoid RT
§ vivaBDS Viva Questions
- 01Ackerman tumour?
- 02Why is neck dissection often omitted?
- 03Anaplastic transformation?
§ mcqsMCQs — Assessment (3)
Question 1
Verrucous carcinoma is characterised by:
Question 2
Treatment of choice:
Question 3
Metastatic potential:
§ evidenceReferences & Evidence
Current Classification
WHO Classification of Head and Neck Tumours
5th Edition — Volume 9
WHO Classification of Tumours Editorial Board · 2022
The authoritative international classification of head and neck, odontogenic and salivary gland tumours. Current terminology on this site follows this edition.
Evidence summary
Highest level of evidence linked to this page: WHO / Official Classification.
- L1 · Classification — 2
- L6 · Textbook — 3
1 linked source was published from 2024 onwards. Where guidance is limited or contested, rely on the higher-level sources above rather than this summary. Educational use only — not a substitute for clinical judgement.
Content last reviewed
September 2026
Evidence last reviewed
September 2026
Next scheduled review
September 2027
Review status
EVIDENCE REVIEWED
Search latest PubMed evidence
Last literature search: 7 September 2026
Current Classification
WHO Classification of Tumours Editorial Board. IARC / World Health Organization · 2022
The authoritative international classification of head and neck, odontogenic and salivary gland tumours. Current terminology on this site follows this edition.
IARC / WHO. IARC · 2022
Continuously updated online edition of the WHO head and neck tumour classification.
Histopathology References
Barnes L. CRC Press · 2008
Detailed histopathological reference for head and neck diagnostic criteria.
Textbook References
Neville BW, Damm DD, Allen CM et al.. Elsevier · 2024
Standard reference textbook of oral and maxillofacial pathology used throughout this atlas.
Rajendran R, Sivapathasundharam B. Elsevier · 2020
Undergraduate and postgraduate oral pathology textbook widely used in BDS and FCPS curricula.
Additional sources cited on this page
- Ackerman LV. Surgery 1948
Draft — pending faculty review. Educational use only; verify against current guidelines and primary sources before clinical application.