What do we call a fungal infection of the skin that appears in circular lesions?

The term used for a fungal infection of the skin that manifests as circular lesions is ringworm. This is a common name for dermatophytosis, which is caused by a group of fungi known as dermatophytes. The circular appearance of the lesions, often with a red, scaly border and healthy skin in the center, is characteristic of this condition.

In contrast, psoriasis is an autoimmune condition that leads to the rapid build-up of skin cells, resulting in thick, red patches covered with white scales, rather than circular lesions. Dermatitis refers to inflammation of the skin and can take various forms, such as contact dermatitis or atopic dermatitis, but it does not typically present as circular lesions associated with fungal infections. Tinea capitis specifically refers to a fungal infection of the scalp and does not denote a general fungal infection of the skin. Thus, ringworm is the most accurate term for this type of fungal infection with circular lesions.