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Background Pathologic grooming disorders can lead to clinically significant distress and functional impairment. Studies on treatment of these disorders with selective serotonin reuptake inhibitors (SSRIs) and anticonvulsants have led to inconsistent findings. Nacetylcysteine (NAC) has shown promise in treatment of obsessive-compulsive and related disorders. The objective of this article is to perform an updated review of NAC in the treatment of grooming disorders. Methods PubMed was searched from inception to October 2017 to identify literature on the use of NAC in the management of trichotillomania, onychophagia, and pathological skin picking. Case reports, case series, and randomized controlled trials were included. Data on study design, dosing regimens, comorbidities, concurrent treatment, and side effects were extracted from the included articles.Results Fifteen articles were included in this review, which consisted of 10 case reports, one case series, and four randomized controlled trials. Dosing of oral NAC ranged from 450 to 2,400 mg per day, and treatment periods lasted from 1 to 8 months. Side effects were uncommon, mild, and usually gastrointestinal in nature, with severe aggression reported in one child.Conclusions While there are multiple reports of the safety and efficacy of NAC in the treatment of grooming disorders, there are currently few randomized controlled trials on this topic, and more research is needed to develop a formal treatment algorithm. While current data should be considered very preliminary, case reports have demonstrated mostly positive results and a lack of significant side effects. A trial of NAC may be a viable option for pathologic grooming disorders, especially in patients who have failed prior psychologic or pharmacologic treatment.

Background: Lingual necrosis is a rare complication of giant cell arteritis (GCA). Methods: A 77-year-old woman presented for treatment of a painful and discolored tongue, odynophagia, and dehydration refractory to antimicrobials over 2 weeks. An extensive, well-demarcated necrotic area was visualized on the anterior tongue upon admission. Leukocytosis, thrombocytosis, and elevated erythrocyte sedimentation rate were present. Computed tomography angiogram of the head and neck revealed an undulated-beaded appearance of the distal internal carotid arteries and vertebral arteries bilaterally. Results: High-dose intravenous steroids were initiated for suspected vasculitis. Temporal artery biopsy confirmed the diagnosis of GCA. The patient’s condition improved and the anterior tongue was well healed at 1 month follow-up. Conclusions: An atypical presentation of GCA (eg, isolated lingual necrosis) risks a delay in diagnosis and increased morbidity. Any patient above the age of 50 years presenting with tongue necrosis, in the absence of known cause, should undergo expedited workup for GCA.

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ObjectiveTo characterize the clinical and histologic presentation of reactive granulomatous dermatitis (RGD) in the pediatric population.MethodsIn this multicenter retrospective chart review, 7 pediatric patients with biopsy‐proven RGD were identified. Photographs, histology reports, and clinical course were reviewed to discover patterns in demographics, comorbid conditions, autoimmune sequelae, drug exposures, infections, morphology, and histologic features.ResultsOverall, 7 patients were included and analyzed. Most were female and Hispanic. All presented with a similar dermatologic phenotype previously described in the adult literature including macular erythema and annular, pink to violaceous, edematous papules and plaques, often involving proximal extremities and extensor joints. All biopsies demonstrated variable collagen alteration and a perivascular interstitial infiltrate of histiocytes with or without mucin. Neutrophils or karyorrhexic debris were present in 4/7 of the biopsies, and eosinophils were occasionally seen (2/7 cases). In all cases, RGD was associated with active SLE or led to a new diagnosis, and initiation of systemic treatment improved cutaneous disease.ConclusionsPediatric RGD was more common in female patients and ethnic minorities, and strongly associated with SLE. Clinical and histologic presentations were consistent across all cases with only minor variations, suggesting that recognition and confirmation might be expedited by familiarity with these dominant patterns. Diagnosis of RGD in pediatric patients should prompt screening for SLE.