All are precanerous except
Correct Answer: Verrucous carcinoma
Description: Verrucous carcinoma is a squamous cell carcinoma, commonly occurring in mucous membrane or muco- cutaneous junction without lymph node spread. It is dry, exophytic, way, indurated growth. It has good prognosis. It is a curable malignancy. Surgery is the treatment--wide excision;No radiotherapy used. Leukoplakia is a white patch in the mucosa of the oral cavity that cannot be characterised clinically or pathologically to any other disease. It is the most common and is a high risk premalignant condition of oral cavity(definite risk of malignant change). Oral submucosal fibrosis is a medium risk premalignant condition of oral cavity(premalignant but not ass/w higher incidence of carcinoma). 4.5-7.6% of oral submucosal fibrosis turns into malignancy.Oral lichen planus is a premalignant lesion of oral cavity with equivocal risk.Reference : page 369 and 370 SRB's manual of surgery 5th edition
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