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Objective: The familial type of oral lichen planus (OLP) is rare, with a paucity of data regarding its clinical significance. Our objective was to characterize patients with familial OLP. Methods: Families with at least two members diagnosed with OLP were included. Clinical and demographic data and medical history were recorded. Results: Twenty families, 19 Jewish and 1 Arab, were identified. Of the Jewish families, 57.8% were non‐Ashkenazi, originating mainly from central Asia. Of those with OLP there were 14 males and 23 females with an average age of 49.1. Dyslipidemia, cardiovascular, and thyroid disorders (27.7%, 22.2%, and 16.6%, respectively) were the most common comorbidities. Five patients from five distinct families had oral cancer, two with second primary. Conclusions: To the best of our knowledge, this is the largest study describing familial OLP. The predominant and common ethnicity of the families with multiple members diagnosed with OLP may imply an ethnic tendency. The higher tendency of hypothyroidism and the high percentage of OSCC among familial OLP patients might be connected to familial OLP and the latter suggests that this population is predisposed to malignant transformation. Thus, this group should be considered as a high‐risk group. [ABSTRACT FROM AUTHOR]

Objective: Sjogren's syndrome (SjS) causes salivary gland impairment leading to oral dryness. Parotid sialo‐cone‐beam computerized tomography (sialo‐CBCT) demonstrates ductal architecture and to a lesser extent gland activity. This study characterizes radiographic features of patients suspected for SjS and looks for a possible correlation with the diagnosis of SjS. Methods: The clinical and radiographic data of suspected SjS/dry mouth patients referred for sialo‐CBCT in 2011–2014 were reviewed retrospectively. Two observers studied the scans for various radiographic features including duct morphology, level of branching, ductopenia and sialectasia. These features were analysed taking the specific clinical data and two sets of SjS criteria: The 2002 American‐European Consensus Group (AECG) and the 2012 American College of Rheumatology (ACR) Group. Results: Sialo‐CBCT scans of 67‐referred patients suffering from dry mouth (115 parotid glands) were included. Intraradiographic association was found between ductopenia and all other radiographic parameters. Minimal, yet important, radiographic differences were found between left and right parotid glands. AECG‐confirmed‐SjS patients showed strong correlation with radiographic features, whereas ACR 2012‐confirmed‐SjS patients did not. Conclusion: Sialo‐CBCT demonstrates novel radiographic features which may clarify the diagnosis of SjS. Further studies are needed to determine the role of sialo‐CBCT in diagnosis of SjS. [ABSTRACT FROM AUTHOR]