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The original version of this article, published on 04 June 2018, unfortunately contained a mistake.

Background: Lichen Planus (LP) is a chronic idiopathic disorder of the skin, nails, and mucous membranes with a varied clinical presentation. This study describes the epidemiology and treatment of LP patients treated in a large tertiary medical center.
Method(s): This retrospective chart review identified 294 patients with biopsy-proven LP seen within the dermatology department at NYU Langone Medical Center from January 1, 2005, September 5, 2016. Patients were identified using ICD code-based queries (ICD-9 697.0, ICD-10 L43.0-L43.9). Demographic, physical examination, pathologic, laboratory, and treatment data were extracted.
Result(s): Of 294 participants, 65% were female. Fifty-five percent were white, 16% black, 12% South Asian, 10% Hispanic, and 6% Asian. Mean age at symptom-onset, presentation, and diagnosis was 46.7, 51, and 49.9 years, respectively. Initial misdiagnosis occurred in 15.6% of patients. Of individuals for whom physical examination was recorded (n = 282), 35.1% had documented mucosal involvement (59.6% oral only, 19.2% genital only, and 21.2% both oral and genital). Cutaneous involvement was seen in 69.5% of patients with mucosal involvement of only the oral cavity, compared with 36.8% with only genital involvement. Pruritus was the most common symptom (57.3%). Hepatitis C testing was performed in 38.3% of patients; 9.7% of those tested were positive. Sixty-seven percent were treated with topicals only and 27.5% received systemic therapy. In total, 20 systemic agents were used; prednisone was used most commonly, followed by cyclosporine and hydroxychloroquine. Of patients on systemic therapies, 28.4% required 2 or more systemic agents during their course.
Conclusion(s): This is the largest study to date to describe the epidemiology and treatment of lichen planus. Lichen planus is most common among women, has a mean age of onset of 46.7 years, and most commonly presents with pruritus. Mucosal involvement is present in 35.1% of individuals, most commonly involving the oral cavity. Patients with only oral involvement had a higher rate of cutaneous involvement than subjects with only genital involvement. The majority of patients did not receive hepatitis C testing, but 9.7% of those with test results were positive. Topical monotherapy was often insufficient, and 27.5% of patients required systemic therapy. Systemic therapy most commonly included the use of corticosteroids, although many required therapy with multiple systemic agents.
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The pathophysiology of generalized essential telangiectasia is not well understood. Generalized essential telangiectasia is an uncommon disorder in which widespread telangiectasias of unknown cause develop without associated systemic or antecedent dermatologic disease. We report a case of generalized essential telangiectasia in an otherwise healthy 49-year-old man.

Kaposi sarcoma (KS) is a vascular neoplasm that is one of the most common human immunodeficiency virus (HIV)-related malignancies. We present the case of a 42-year-old man with a new diagnosis of HIV and acquired immune deficiency syndrome (AIDS)-related epidemic KS.