Stomatitis nicotina palate that is caused by heat. As such, these sources tend to state that stomatitis nicotina is a premalignant condition. Some reports show that there is an increased risk of tonsillar cancer, lung cancer and tumors of the posterior oral cavity in people who develop stomatitis nicotina. The diagnosis is normally made based upon the clinical appearance and history. Tissue biopsy is not usually indicated unless there are areas of ulceration or localized erythroplakia (red patches). The differential diagnosis is with other causes of white lesions (see leukoplakia for a more complete discussion). Specific conditions which can produce a similar
History of medicine in the Philippines Rodrigo de San Miguel's "Manual de Medicina Domestica" (Manual on Domestic Medicine), and Fr. Manuel Vilches' "Manuel del Mediquillo Visaya" (Manuel of the Visayan Traditional Healers). Philippine National Artist and painter Carlos "Botong" V. Francisco recorded and depicted the history of medicine in the Philippines by creating four mural-like four-panel oil paintings collectively titled "The Progress of Medicine in the Philippines", which traced the practice of medicine from the times of the "babaylans" ("medicine men and women") up to a period in the modern-day era. The first painting depicts pre-colonial medicine, the second portrays medicine during the Spanish colonial period,