Are patients with lichen planus really prone to urolithiasis? Lichen planus and urolithiasis

Relationship between psoriasis and urolithiasis

The aim of the present study was to investigate whether patients with psoriasis are prone to urolithiasis. Prospective analysis of 67 patients diagnosed as psoriasis (PS group) and 65 volunteers who had never been diagnosed as psoriasis (NPS group) was performed. The levels of oxalate, citrate, calcium, uric acid, magnesium, creatinine, and sodium were evaluated by analyzing the 24-h urine samples. Stone events were detected in 13 patients (19.4%) in the PS group and in five participants (7.7%) in the NPS group, respectively (P < 0.05). The median value of 24-h citrate was significantly lower in the PS group than in the NPS group (P = 0.029). The median value of 24-h urine uric acid was significantly higher in the PS group than the NPS group (P = 0.005). Hypernatriuria was significantly higher in the PS group (P = 0.027). Hyperuricosuria was detected in the 10.4% and 1.5% of patients who had severe and mild disease, respectively (P = 0.027). Patients with psoriasis are more prone to urolithiasis. Hypocitraturia, hyperuricosuria, and hypernatriuria were the main metabolic abnormalities detected in psoriasis. Hyperuricosuria has been associated with the severity of the disease.

Prevalence and risk of chronic kidney disease in oral lichen planus: a large cross-sectional study from eastern China

Background

Oral lichen planus (OLP) is a chronic inflammatory mucocutaneous disease which is frequently associated with comorbidities such as diabetes and cardiovascular diseases. However, little is known about the association of OLP with impaired kidney function. To elucidate the possible association of chronic kidney disease (CKD) with OLP and its severity, this study investigated the prevalence of CKD as well as its risk factors in patients with OLP.

Methods

A large prospective cross-sectional study of 1,021 patients with OLP was carried out using questionnaires and laboratory tests available from an oral medicine clinic at a university in eastern China. According to the Kidney Disease: Improving Global Outcomes (KDIGO) diagnostic guideline, CKD was classified based on the estimated glomerular filtration rate (eGFR, <60 mL/min/1.73 m²) or urinary albumin to creatinine ratio (UACR, >30 mg/g).

Results

The prevalence of CKD in the patients with OLP in this study was 14.3% (95% CI, 12.3–16.6%), which was higher than that in the general Chinese population (10.8%; 95% CI, 10.2–11.3%). The mean values of serum creatinine, eGFR, UACR, and urine N-acetyl-β-D-glucosidase in patients with CKD were significantly higher than those in patients without CKD (all P<0.01). Pearson’s correlation analysis revealed that CKD stage and UACR were positively correlated with the severity of OLP (both P<0.001). Importantly, multivariate regression analysis revealed that age ≥58 years old, female sex, and hypertension were independent risk factors for incident CKD and abnormal UACR (>30 mg/g) in patients with OLP (all P<0.01).

Conclusions

This study has reported for the first time that CKD is a comorbidity in patients with OLP. The occurrence and staging of incident CKD are associated with OLP and its severity.

Bullous Lichen Planus: Case Report and Review

Lichen planus is a chronic inflammatory mucocutaneous disorder that is seen in skin and oral mucosa. Definitive etiology for oral lichen planus remains unknown. It may or may not be associated with skin lesions. Different clinical patterns such as reticular, plaque, erosive, bullous, and atrophic are seen in oral mucosa of which bullous lichen planus is a rare entity. We present a unique case of bullous lichen planus in a 20-year-old male without skin manifestations along with the review of literature comprising various case reports of bullous lichen planus.