Dermatologic Manifestations of Verrucous Carcinoma Workup
- Author: Bassam Zeina, MD, PhD; Chief Editor: William D James, MD more...
Imaging Studies
Computed tomography or magnetic resonance imaging may be used to demonstrate the exact location and extent of the verrucous carcinoma (VC) tumor for preoperative staging and surgical planning.
Procedures
A skin biopsy always is required for definitive diagnosis of verrucous carcinoma, despite the fact that the diagnosis is suspected strongly on clinical grounds.
Biopsy is performed routinely in the physician's office using a local anesthetic.
All skin biopsy specimens obtained to diagnose verrucous carcinoma must reach at least the depth of the mid dermis to allow for determination of the presence or absence of invasive disease.
A deep (scoop) shave biopsy, a punch biopsy, an incisional biopsy, or an excisional biopsy may be performed.
Pathology readings preferably are made by a dermatopathologist who has extensive experience with verrucous carcinoma.
Histologic Findings
Regardless of site of origin, verrucous carcinomas share the same histological features. Verrucous carcinoma of all types may resemble a verruca superficially, with hyperkeratosis, parakeratosis, acanthosis, papillomatosis, and granular cell layer vacuolization. A characteristic feature is the blunt projections of well-differentiated epithelium surrounded by edematous stroma and chronic inflammatory cells that extend into the dermis, sometimes forming sinuses filled with keratin, particularly in carcinoma cuniculatum. Cutaneous verrucous carcinomas may be confused with warty carcinomas, but the higher-grade cytological atypia and the more infiltrative growth pattern of warty carcinomas can help to differentiate.
Staging
Most verrucous carcinomas are nonmetastatic and are staged based on size, as follows:
- T0 lesions - In situ
- T1 lesions - Less than 2 cm in diameter
- T2 lesions - Between 2 and 4 cm in diameter
- T3 lesions - Greater than 4 cm in diameter
- T4 lesions - Invasive of muscle or bone
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