This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
A 70 year old male who has been chewing tobacco for the past 50 years presents with a six months history of a large, fungating, soft papillary lesions in the oral cavity penetrating into the mandible. Lymph nodes are not palpable. Two biopsies taken from the lesion proper show benign appearing papillomatosis with hyperkeratosis and acanthosis infiltrating the subjacent tissues. The most likely diagnosis is: 
Select and explain. 
A. Squamous cell papilloma, B. Squamous cell carcinoma, C. Verrucous carcinoma, D. Malignant mixed tumour
C: Verrucous carcinoma
Answer: C: Verrucous carcinoma 
Explanation: Verrucous carcinoma is also referred to as a giant condyloma accuminatum or buschke lowenstein tumor of the oral cavity. It is considered an intermediate lesion between condyloma accuminata and invasive squamous cell carcinoma. These cancers tend to localize and are cured by wide excision, however they can undergo malignant transformation into an invasive squamous cell carcinoma.