Retinoids for the Treatment of Refractory Grover's Disease: A Case Series and Review of the Literature.

Grover's disease, also known as transient acantholytic dermatosis (TAD), currently has no published randomized control trials regarding the treatment of the disease; thus, evidence for treatment is largely derived from case studies and case reports. In this case series, we summarize the current treatment options for Grover's disease and discuss two cases of refractory Grover's disease treated with low-dose oral isotretinoin in patients who previously failed to reach clearance with multiple treatment options. Our aim is to highlight the efficacy of low-dose systemic retinoid therapy in Grover's disease when other treatment options prove unsatisfactory.

Case Report of Leprosy in Central Florida, USA, 2022.

Florida, USA, has witnessed an increased incidence of leprosy cases lacking traditional risk factors. Those trends, in addition to decreasing diagnoses in foreign-born persons, contribute to rising evidence that leprosy has become endemic in the southeastern United States. Travel to Florida should be considered when conducting leprosy contact tracing in any state.

Intralesional Certolizumab for Refractory Lupus Pernio.

This case report describes a patient with refractory lupus pernio that responded to treatment with a series of intralesional certolizumab injections.

Photodistributed Lichenoid Eruption with Alopecia: A Unique Presentation of Graham-Little-Piccardi-Lasseur Syndrome.

Graham-Little-Piccardi-Lasseur syndrome (GLPLS) is characterized by diffuse alopecia and a lichenoid follicular eruption affecting the scalp, eyebrows, and intertriginous regions. It is considered a variant of lichen planopilaris. The condition often begins as hyperkeratotic papules on the trunk and extremities followed by the development of alopecia. Several subtypes of lichen planus have been associated with a photodistriubuted eruption including lichenoid drug reactions, actinic lichen planus, and lichen planus pigmentosus; however, there are no reported cases associated with GLPLS. We herein report the first case of GLPLS displaying a photodistributed lichenoid eruption to expand upon the differential diagnosis of photoaggravated conditions. We also use this case to review the pathophysiology and therapeutic modalities to manage GLPLS.

An Updated Review of the Therapeutic Management of Keratoacanthomas.

Objective: Keratoacanthomas are fast-growing cutaneous neoplasms that can be difficult to distinguish from squamous cell carcinoma, both clinically and histologically. The uncertain behavior of these neoplasms creates a challenge in management, and treatment choice often varies significantly between cases. The objective of this review is to discuss the most common and up-to-date treatment modalities used in the management of keratoacanthomas. Methods: A literature search was performed using PubMed to access and review relevant keratoacanthoma treatment modalities published within the last 40 years. Keywords searched included "keratoacanthoma," "Grzybowski syndrome," "Ferguson-Smith syndrome," "Witten-Zac syndrome," and "Muir-Torre" syndrome. Results: Our search resulted in 3,408 articles, of which 67 articles were ultimately included in this review. Conclusion: Although surgical removal with excision or Mohs micrographic surgery remains the standard of therapy, there are many alternative therapeutic modalities that can be utilized.

Superficial solitary fibrous tumor masquerading as a dermoid cyst: a case report.

Background: Solitary fibrous tumors (SFTs) are relatively rare spindle cell neoplasms uncommonly seen in dermatology practice. Initially discovered as a pleural tumor, SFTs have also been found in extra-pleural sites including the skin and soft tissues. When arising within the dermis or subcutis they are termed superficial SFTs, where they often present as solitary, unilateral, slow growing superficial masses. Histologically, they are composed of spindle cells arranged in a "patternless" pattern with hemangiopericytoma-like vessels dispersed throughout. Historically, CD34, CD99 and Bcl-2 immunohistochemical (IHC) stains were used to differentiate SFTs from other spindle cell neoplasms, however these markers are not entirely specific. Recent discovery of a disease defining NGFI-A binding protein 2 (NAB2)-signal transducer and activator of transcription 6 (STAT6) fusion gene has led to the use of STAT6 IHC staining to help verify the diagnosis of SFTs, particularly in unexpected sites. Case Description: We report a case of a 23-year-old woman with a slowly growing lateral supra-orbital mass, clinically concerning for a dermoid cyst, which was subsequently discovered to be a SFT on pathologic examination, with the diagnosis being verified by STAT6 immunostaining. Conclusions: SFTs are rarely encountered in dermatologic practice, however, must be kept on the differential of subcutaneous nodules, including those occurring in young adults. Due to the rarity of these tumors in clinical practice, a proposed algorithm for the approach to management of SFTs is included, guided by a validated, histology-driven, metastatic risk assessment tool, to help guide other clinicians confronted by these tumors.

Isolated Nail Pigmentation Induced by Minocycline: A Case Report.

Isolated pigmentation of the nails induced by minocycline therapy is an uncommon occurrence that has only been reported in a handful of cases. In the reported cases of isolated nail discoloration, it has been suggested that nail discoloration may occur preceding other sites of pigmentary changes. As certain types of minocycline-induced pigmentation can be permanent, it is important for clinicians to be aware of this association and discontinue therapy as soon as pigmentary changes are noticed. In this report, we present a case of isolated nail discoloration in the setting of prolonged minocycline therapy for the treatment of rosacea.

Impaired calcium signalling and neuropsychiatric disorders in Darier disease: An exploratory review.

Darier (Darier-White) disease (DD) is an autosomal dominant skin disorder caused by pathogenic mutations in the ATP2A2 gene which encodes a calcium ATPase in the sarco-endoplasmic reticulum (SERCA2). Defects in the SERCA2 protein lead to an impairment of cellular calcium homeostasis, which in turn, triggers cell death pathways. There is a high prevalence of neuropsychiatric disorders in patients affected by this condition, namely intellectual disability, bipolar disorder, schizophrenia, and suicidality. Though these associations have been well-documented over the years, little has been discussed or investigated regarding the pathophysiological mechanisms. The goal of this article is to review the literature related to the most commonly associated neuropsychiatric disorders found in patients with DD, highlight the pathophysiological mechanisms underlying each condition, and examine potential interventions that may be of interest for future development. A literature search was performed using PubMed to access and review relevant articles published in the last 40 years. Keywords searched included Darier disease neuropsychiatric, Darier disease pathophysiology, SERCA2 central nervous system, SERCA 2 skin, ATP2A2 central nervous system, ATP2A2 skin, sphingosine-1-phosphate signalling skin, sphingosine-1-phosphate signalling central nervous system, P2X7 receptor skin, and P2X7 receptor central nervous system. Our search resulted in 2692 articles, of which 61 articles were ultimately included in this review.