What is Tinea favosa characterized by?

Tinea favosa is a type of fungal infection that primarily affects the scalp and is characteristic for its distinctive presentation known as "scutula." This term refers to the dry, sulfur-yellow, cup-like crusts that form on the scalp as a result of the infection. These scutula can be quite noticeable and typically accompany hair loss and inflammation. The presence of these crusts is a significant identifier of tinea favosa, as they are a direct manifestation of the fungal activity disrupting normal hair follicle function and skin health.

Other options represent different dermatological conditions or infections. For instance, itchy, red patches are more commonly associated with conditions like eczema or psoriasis. The formation of blisters usually points to infections such as herpes simplex or contact dermatitis. Thickening of the skin is often seen in chronic conditions like lichen simplex chronicus or other skin diseases but is not characteristic of tinea favosa. Thus, the defining feature of tinea favosa is the presence of scutula, which gives it a unique identity among fungal infections.