Our results suggest that the incremental benefit of retreating serofast patients with early syphilis is moderate, considering the almost 1:1 ratio of serological response to serofast state at follow-up.

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Objective: This study was performed to estimate the prevalence of hidradenitis suppurativa (HS) in China and describe the demographic and clinical features of HS in the Chinese population. Methods: This multicenter clinic-based cross-sectional study was conducted in dermatology clinics within 19 hospitals located in 15 cities/provinces across China from September to October 2020. The prevalence of HS was calculated as the percentage of patients with HS among all visitors at participating clinics during the 1-month study period. HS was independently diagnosed by two certified dermatologists at each site. All visitors at participating clinics were screened, and all patients with HS were invited to participate in a questionnaire survey to elucidate the demographics and clinical features of HS in the Chinese population. Results: We identified 92 patients with HS among 274,742 visitors at participating clinics. The prevalence rate was 0.03349% or 33.49 per 100,000 population (95% confidence interval, 26.64-40.32), and the female:male ratio was 1.0:4.7. Conclusion: The overall prevalence of HS in China was lower than that in Western and other Asian countries with a predominance of male patients.

A miner in his early 40s presented with a 6-month history of asymptomatic, erythematous nodules on his face, his chin, the anterior portion of his neck, and the anterior thorax. Approximately 15 years earlier, he had sustained injuries from an accidental land mine explosion that had lacerated his face, neck, and thorax in several places. The wounds apparently healed without difficulty, leaving only scars of expected severity. Approximately 6 months before presentation, the patient began to notice an increase in the size of these lesions. Physical examination showed multiple firm, erythematous, nontender papules, nodules, and small plaques on his face, his chin, the anterior portion of his neck, and the anterior thorax (Figure 1).