Hidradenitis Suppurativa (Acne Inversa)

The Global Healthcare Study on Hidradenitis Suppurativa (GHSHS) is an international, multicenter observational study hosted by the University of Zurich (UZH) investigating healthcare access, treatment patterns, disease severity, and quality of life in patients with psoriasis. The study collects standardized clinical data from routine medical records to identify disparities in healthcare delivery and outcomes across different healthcare systems.

Secukinumab is currently approved in Europe, US and China for the treatment of moderate to severe HS as a biologic agent targeting IL-17A.Two phase III clinical trials (SUNSHINE and SUNRISE) showed that 300 mg s.c. every 2 weeks resulted in 42% to 45% of patients achieving a clinical response (HiSCR) to HS, and the efficacy was sustained through 52 weeks.However, we found in clinical practice that some HS patients present with localized lesions (small areas of involvement, affecting only 1-2 anatomic areas) that are resistant to conventional therapy, and have not yet fulfilled surgical indications, and the need for systemic biologic therapy is controversial.Such patients often experience inadequate response or slow onset of action when they receive secukinumab by routine subcutaneous injection - possibly related to inadequate drug concentration in the focal lesional area and limited local anti-inflammatory effects after systemic administration.In addition, side effects of conventional subcutaneous injection system are greater, and the application is limited in some patients, so it is necessary to explore more appropriate and safer drug delivery method for localized skin lesions.Localized HS, local injection of lesions may enhance anti-inflammatory effects while reducing systemic exposure by increasing drug concentrations at the lesion site.Therefore, exploring novel modes of administration of secukinumab has practical clinical implications based on clinical practice needs and the context of the previous literature.In summary, by exploring the efficacy and safety of local skin injection of secukinumab, this study may provide a new strategy for the treatment of limited HS with sufficient scientific rationale and significant potential benefits and manageable risks.

This study aims to retrospectively analyze the efficacy and safety of secukinumab combined with surgery in treating moderate to severe HS in real-world clinical practice, providing clinical practioners with real-world evidence in HS treatment.

This randomized-control trial is designed to determine the recurrence rate of HS abscesses following drainage via two methods: I\&D with a linear incision and PD with an 8mm punch biopsy. In this context, recurrence is a newly described HS abscess adjacent to or within the previously operated area, for which a second intervention is deemed necessary. We hypothesize that PD may yield a more favorable recurrence rate. In addition to comparing recurrence rates, this randomized-control trial will also evaluate postprocedural pain, the occurrence and type of complications, and patients' quality of life associated with both procedures. These additional factors are crucial in assessing the overall effectiveness and patient satisfaction associated with each method, further informing the potential establishment of PD as the new gold standard for draining small, painful, acute HS abscesses.