Incidence and outcomes of Merkel cell carcinoma related to Merkel cell polyomavirus status in Iceland in 1981-2023.

Background: Impact of Merkel cell polyomavirus (MCPyV) associated Merkel cell carcinoma (MCC) has not been assessed in the Icelandic population, nor in a whole population elsewhere.

Objectives: The primary objective was to assess trends in the incidence of MCC in Iceland and the association with MCPyV. Secondary objectives aimed to analyze MCC outcomes.

Linear discoid lupus erythematous simulating en coup de sabre morphea in a female chronic granulomatous disease carrier.

Discoid lupus erythematosus (DLE), a subtype of chronic cutaneous lupus may be observed in a linear pattern. A 21-year-old woman with history of chronic granulomatous disease state presented to our clinic for a chronic six-year skin eruption on her left eyebrow, left cheek, and left forehead. A punch biopsy of involved left forehead skin was performed and revealed perivascular and periadnexal lymphohistiocytic infiltrate without features of morphea or panniculitis, confirming the histopathologic changes of cutaneous lupus erythematous.

Fellowships in Complex Medical Dermatology.

Complex medical dermatology fellowships currently are offered at 5 institutions in the United States. The decision to pursue this fellowship is individualized; however, additional training can prove to be beneficial when practicing in an environment with medically challenging patient populations.

Rosacea: Practical Guidance and Challenges for Clinical Management.

Rosacea is a common chronic dermatosis. Clinically, rosacea can present with flushing, erythema, papules, pustules, telangiectasias, phymatous changes, pruritus, burning, and stinging. In 2017, the National Rosacea Society Expert Committee recommended a phenotype-based classification for therapy.

Inpatient Dermatology Consultation Services in Hospital Institutions.

Inpatient dermatology plays a key role in the hospital system. Dermatology-related admissions are frequent, and the correct diagnosis and management of cutaneous conditions is crucial to improving patient outcomes and decreasing health care costs. As a dermatology resident, it can be challenging to perform inpatient consultations, especially early in residency.

Disseminate and Recurrent Infundibulofolliculitis: An Under-Recognized Yet Treatable Entity.

Disseminate and recurrent infundibulofolliculitis (DRIF) is a pruritic papular eruption that predominantly affects young adults with Fitzpatrick skin types 4-6. Due to DRIF’s rarity and under-recognition, no standardized treatment guidelines exist. However, several oral agents have been used, including vitamin A, antibiotics, and retinoids.

1% Tirbanibulin Ointment for the Treatment of Actinic Keratoses.

Objective: Actinic keratoses (AKs) are cutaneous lesions that arise in sun-damaged skin. AKs may transform into squamous cell carcinoma in situ. Tirbanibulin 1% ointment is a new topical treatment for AKs, recently approved by the Food and Drug Administration.

Atypical Fibroxanthoma Demonstrating HMB45+ Staining.

Immunohistochemistry is useful and often necessary for the diagnosis of many histopathological entities, including atypical fibroxanthoma (AFX), which is typically considered a diagnosis of exclusion after ruling out spindle cell melanoma, sarcomatoid carcinoma, and other spindle cell tumors. AFX is a superficial fibrohistiocytic tumor previously believed to be related to pleomorphic sarcoma (formerly known as malignant fibrous histiocytoma), but is now considered a distinct clinicopathological entity. AFXs commonly express CD68, smooth muscle actin, and lysozyme and are usually negative for melanocytic markers such as HMB45 and S100.

Use of Reflectance Confocal Microscopy for Hidrocystomas: An Emerging, Cost-Effective, and Powerful Tool.

Reflectance confocal microscopy (RCM) is an emerging and noninvasive imaging tool in dermatological practice. Benefits of this modality include differentiation between benign and malignant skin lesions, prevention of unnecessary biopsies, and cost effectiveness. However, RCM findings for benign lesions are rarely reported in the literature.

Morgellons disease: insights into treatment.

Morgellons disease is a disfiguring and distressing condition. Patients commonly present with multiple, non-healing, cutaneous wounds. Patients report protruding fibers or other objects as the source and often provide samples to the clinician.

Pharmacokinetics of tazarotene and acitretin in psoriasis.

Psoriasis is a prevalent cutaneous condition with severe physical and psychological manifestations. Since the advent of biologics, clinical outcomes in psoriasis have improved. However, retinoids are useful in the correct clinical context.

A Rare Case of Unilateral Morning Glory Disc Anomaly in a Patient with Turner Syndrome: Report and Review of Posterior Segment Associations.

Turner syndrome is a common sex chromosome disorder affecting females. The disorder is caused by a partial loss, complete absence, or structural abnormality of one X chromosome. The clinical presentation is broad and ranges from the classic phenotype to minimal clinical manifestations.

An atypical presentation of a pericardial cyst.

A pericardial cyst is a benign and rare congenital anomaly. The presentation of pericardial cysts varies with the extent of mediastinal involvement. Complaints can include dyspnea, pleuritic chest pain and systemic symptoms; however, the majority are asymptomatic.