Granuloma annulare is a benign granulomatous skin condition characterized by ring-shaped papules and plaques. Although it tends to resolve spontaneously, widespread forms can follow a chronic course requiring treatment. By 2026, treatment algorithms have expanded with new options.
What Is Granuloma Annulare?
Granuloma annulare is a skin disease characterized by granulomatous inflammation surrounding necrobiotic collagen in the dermis. It can occur at any age but is more common in children and young adults. The localized form is twice as prevalent in women as in men.
The exact cause of the disease has not yet been fully elucidated. However, delayed-type hypersensitivity reactions and Th1-mediated immune responses are thought to play a central role in the pathogenesis. Overexpression of matrix metalloproteinases and collagen degradation are characteristic histopathological findings.
Triggering Factors
Various triggering factors have been identified in the development of granuloma annulare. Trauma, insect bites, sunburns, and viral infections are among the triggers of the localized form. Generalized granuloma annulare has been associated with diabetes mellitus, thyroid diseases, and hyperlipidemia.
Certain medications may also trigger the condition. TNF-alpha inhibitors, allopurinol, and some vaccines have been linked to the development of granuloma annulare. For this reason, a detailed medication history is important.
Clinical Forms
Localized Granuloma Annulare
This is the most common form, accounting for approximately 75% of all cases. It presents with annularly arranged, skin-colored or slightly erythematous papules on the dorsal hands, dorsal feet, elbows, and knees. Lesions are generally asymptomatic and may resolve spontaneously within a few years.
Generalized Granuloma Annulare
It is characterized by widespread papules and plaques involving large areas of the body. The trunk and extremities are the most frequently affected regions. The rate of spontaneous resolution is low and it tends to follow a chronic course. This form appears at a more advanced age and has a stronger association with systemic disease.
Subcutaneous Granuloma Annulare
This form, seen particularly in children, features firm, painless subcutaneous nodules. The lower extremities, hands, and scalp are the most commonly affected sites. Careful evaluation is required to differentiate it from rheumatoid nodules.
Perforating Granuloma Annulare
In this rare form, necrobiotic material is eliminated from the center of lesions via transepidermal elimination. Crusts or ulceration may be seen on the papules, which are typically located on the extremities.
Diagnosis
Diagnosis is usually based on the clinical appearance. Papules in a typical annular configuration with characteristic localization may be sufficient for diagnosis. Tinea corporis, erythema annulare, sarcoidosis, and lichen planus should be considered in the differential diagnosis. A skin biopsy is performed in uncertain cases. Histopathology demonstrating a palisaded granuloma structure and necrobiotic collagen areas surrounded by mucin deposits confirms the diagnosis.
Treatment Options 2026
Topical and Intralesional Treatments
High-potency topical corticosteroids are the first-line option for the localized form. Intralesional triamcinolone injection is an effective method for resistant plaques. Topical calcineurin inhibitors can be used as an alternative for lesions in sensitive areas. Please contact us for pricing information on these treatments.
Phototherapy
Narrowband UVB and PUVA therapy are important options for the generalized form. Photodynamic therapy has also shown successful results in some cases.
Systemic Treatments
Dapsone, hydroxychloroquine, and methotrexate may be used in widespread and resistant cases. In recent years, JAK inhibitors have shown notable results in the treatment of granuloma annulare. Significant clinical improvement has been reported in studies with tofacitinib and baricitinib.
Among biological agents, dupilumab and TNF-alpha inhibitors are also being considered in selected cases.
Conclusion
Although granuloma annulare generally follows a benign course, widespread forms can negatively affect the patient's quality of life. The treatment advances of 2026, particularly in the management of resistant cases, offer new hope.