What is a common fungal infection that can be seen intraorally?

Oral candidiasis is indeed the common fungal infection that can be seen intraorally. This condition is caused by an overgrowth of Candida, a type of yeast that naturally exists in the mouth but can proliferate in certain conditions such as a weakened immune system, dry mouth, or after antibiotic use. The characteristic feature of oral candidiasis is the presence of white patches or lesions in the mouth, which can be easily wiped away, often revealing a red, sore surface underneath.

Understanding the distinction between oral candidiasis and the other options is essential. Herpes simplex refers to a viral infection that results in sores, primarily around the lips or mouth, but it is not fungal in nature. Angular cheilitis is more about inflammation at the corners of the mouth, often due to bacterial or fungal factors, and is not specifically classified as a fungal infection in itself. Stomatitis, which refers to inflammation of the mucous tissue inside the mouth, can be caused by various factors, including infections and irritants, but does not specifically denote a fungal etiology. Therefore, oral candidiasis is the definitive answer, as it is the only one that expressly identifies a fungal infection present in the oral cavity.