A case report on acquired reactive perforating collagenosis

Abstract

Introduction: Acquired reactive perforating collagenosis (ARPC) is a rare perforating skin disease with unclear pathogenesis, often leading to misdiagnosis. Utilizing noninvasive skin microscopy improves diagnostic accuracy while reducing misdiagnosis rates. Patient concerns: Given its association with systemic diseases, comprehensive examinations are crucial for early detection of related diseases such as tumors. Clinically, it still lacks standardized guidelines for the treatment. Clinical treatment is mostly based on symptomatic treatment. Oral administration of pregabalin capsules can significantly relieve itching symptoms, and narrow-wave ultraviolet irradiation can accelerate the recovery of skin lesions. Diagnosis: Dermoscopy and skin biopsy was used to confirm this case was ARPC. Interventions: Treatment was based on oral administration of 20 mg prednisone, 1 tablet of loratadine, 1 tablet of pregabalin in the morning and evening, and external application of halomethasone ointment. Outcomes: Itching symptoms were significantly relieved. Conclusion: This case report demonstrates that clinical dermoscopy can improve the diagnosis rate of ARPC, and pregabalin capsules can significantly relieve itching symptoms.