Chronic Mucocutaneous Candidiasis

Chronic Mucocutaneous Candidiasis is a condition that affects the skin, nails, and mucous membranes by causing persistent and recurrent infections with the fungus Candida. This disorder primarily impacts the body's ability to fight off these fungal infections, leading to chronic redness, scaling, and thickening of affected areas. The immune system, especially the part responsible for defending against fungal pathogens, does not work properly in people with this condition. It often starts in childhood and can cause discomfort and visible changes in the mouth, skin, and nails. Because the infections are persistent, they can interfere with daily activities and quality of life. The condition involves a problem with the body's immune response to fungi, making it difficult to clear these infections effectively.

Chronic Mucocutaneous Candidiasis (CMC) is a group of disorders characterized by persistent or recurrent infections of the skin, nails, and mucous membranes caused by Candida species, primarily Candida albicans. The core pathology involves a defect in cell-mediated immunity, particularly impaired T-cell mediated responses against fungal pathogens. This immune dysfunction is often due to genetic mutations affecting the IL-17 pathway or other immune signaling components, such as mutations in STAT1 or AIRE. Clinically, CMC presents with chronic mucocutaneous candidiasis, including oral thrush, onychomycosis, and chronic paronychia. The condition is significant because it predisposes patients to persistent fungal infections that are resistant to standard treatments and may be associated with autoimmune manifestations or endocrinopathies in syndromic forms.