Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico S. Orsola-Malpighi, 40138 Bologna, Italy.
Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy.
Medicina (Kaunas). 2024 Nov 8;60(11):1839. doi: 10.3390/medicina60111839.
Pityriasis rubra pilaris (PRP) presents a diagnostic challenge due to its varied clinical manifestations and the scarce literature on scalp involvement. This article presents a case report of a 59-year-old female with PRP solely affecting the scalp, detailing its clinical, trichoscopic, and histopathological features. Trichoscopy revealed a novel finding of white-silvery scales forming hair casts with a triangular shape, distinct from the existing literature. A literature review comparing our findings with pertinent articles underscored the uniqueness of our case. We discuss differential diagnoses and treatment options, based on available evidence. Our case highlights the importance of understanding scalp manifestations in PRP, enhancing diagnostic accuracy, and improving treatment strategies for this rare condition. Furthermore, the review of the literature compares our observations with available case reports and case series, outlining differential diagnoses and trichoscopic and histopathological diagnostic approaches to PRP, enriching overall clinical knowledge of PRP.
红糠疹（PRP）因其临床表现多样，头皮受累的文献稀少，诊断具有挑战性。本文报告了一例仅累及头皮的 59 岁女性 PRP 病例，详细描述了其临床、毛发镜和组织病理学特征。毛发镜检查显示了一种新的发现，即白色银灰色鳞屑形成三角形的发套，与现有文献不同。与相关文章的文献回顾比较了我们的发现，突出了我们病例的独特性。我们根据现有证据讨论了鉴别诊断和治疗选择。我们的病例强调了理解 PRP 头皮表现的重要性，提高了诊断准确性，并改善了这种罕见疾病的治疗策略。此外，文献回顾将我们的观察结果与现有的病例报告和病例系列进行了比较，概述了 PRP 的鉴别诊断和毛发镜及组织病理学诊断方法，丰富了 PRP 的整体临床知识。
