Background: Primary cutaneous CD30+ lymphoproliferative disorders (pcCD30-LPDs) are a diseases with various clinical and prognostic characteristics. Objective: Increasing our knowledge of the clinical characteristics of pcCD30-LPDs and identifying potential prognostic variables in an Asian population. Methods: Clinicopathological features and survival data of pcCD30-LPD cases obtained from 22 hospitals in South Korea were examined. Results: A total of 413 cases of pcCD30-LPDs (lymphomatoid papulosis [LYP], n=237; primary cutaneous anaplastic large cell lymphoma [C-ALCL], n=176) were included. Ninety percent of LYP patients and roughly 50% of C-ALCL patients presented with multiple skin lesions. Both LYP and C-ALCL affected the lower limbs most frequently. Multiplicity and advanced T stage of LYP lesions were associated with a chronic course longer than 6 months. Clinical morphology with patch lesions and elevated serum lactate dehydrogenase were significantly associated with LPDs during follow-up in LYP patients. Extracutaneous involvement of C-ALCL occurred in 13.2% of patients. Lesions larger than 5 cm and increased serum lactate dehydrogenase were associated with a poor prognosis in C-ALCL. The survival of patients with C-ALCL was unaffected by the anatomical locations of skin lesions or other pathological factors. Conclusion The multiplicity or size of skin lesions was associated with a chronic course of LYP and survival among patients with C-ALCL.

Background: The number of general cosmetic practitioners impersonating dermatologists in Korea has increased, leading to serious harm that is significant enough to attract the attention of health authorities, which dermatologists are deeply concerned about. Objective: We conducted a survey targeting dermatologists to gather their opinions on the behavior, problems, and countermeasures of general cosmetic practitioners disguising themselves as dermatologists. Methods: A total of 280 dermatologists completed the survey between January and February 2024. The questions covered demographic characteristics, experiences of cosmetic general practitioners falsely introduced themselves as dermatologists, complications experienced by patients who received treatment after being mistaken for a dermatologist, the seriousness of the problem for cosmetic general practitioners impersonating dermatologists, and the relationship between the shortage of essential medical personnel and the phenomenon of cosmetic general practitioners disguising themselves as dermatologists. Results: Despite cases in which cosmetic general practitioners impersonate dermatologists, most dermatologists have not responded appropriately in many instances. Dermatologists have reported many cases of complications after receiving dermatological treatment from such cosmetic general practitioners. Most dermatologists are concerned about the serious problems of general cosmetic practitioners, disguising themselves as dermatologists and anticipating many adverse effects. Conclusion We believe that we need to pool our wisdom to solve these problems and expect that this study will provide valuable basic data for solving these problems in the dermatology and medical environments of Korea.

Background: The number of general cosmetic practitioners impersonating dermatologists in Korea has increased, leading to serious harm that is significant enough to attract the attention of health authorities, which dermatologists are deeply concerned about. Objective: We conducted a survey targeting dermatologists to gather their opinions on the behavior, problems, and countermeasures of general cosmetic practitioners disguising themselves as dermatologists. Methods: A total of 280 dermatologists completed the survey between January and February 2024. The questions covered demographic characteristics, experiences of cosmetic general practitioners falsely introduced themselves as dermatologists, complications experienced by patients who received treatment after being mistaken for a dermatologist, the seriousness of the problem for cosmetic general practitioners impersonating dermatologists, and the relationship between the shortage of essential medical personnel and the phenomenon of cosmetic general practitioners disguising themselves as dermatologists. Results: Despite cases in which cosmetic general practitioners impersonate dermatologists, most dermatologists have not responded appropriately in many instances. Dermatologists have reported many cases of complications after receiving dermatological treatment from such cosmetic general practitioners. Most dermatologists are concerned about the serious problems of general cosmetic practitioners, disguising themselves as dermatologists and anticipating many adverse effects. Conclusion We believe that we need to pool our wisdom to solve these problems and expect that this study will provide valuable basic data for solving these problems in the dermatology and medical environments of Korea.

Background: The number of general cosmetic practitioners impersonating dermatologists in Korea has increased, leading to serious harm that is significant enough to attract the attention of health authorities, which dermatologists are deeply concerned about. Objective: We conducted a survey targeting dermatologists to gather their opinions on the behavior, problems, and countermeasures of general cosmetic practitioners disguising themselves as dermatologists. Methods: A total of 280 dermatologists completed the survey between January and February 2024. The questions covered demographic characteristics, experiences of cosmetic general practitioners falsely introduced themselves as dermatologists, complications experienced by patients who received treatment after being mistaken for a dermatologist, the seriousness of the problem for cosmetic general practitioners impersonating dermatologists, and the relationship between the shortage of essential medical personnel and the phenomenon of cosmetic general practitioners disguising themselves as dermatologists. Results: Despite cases in which cosmetic general practitioners impersonate dermatologists, most dermatologists have not responded appropriately in many instances. Dermatologists have reported many cases of complications after receiving dermatological treatment from such cosmetic general practitioners. Most dermatologists are concerned about the serious problems of general cosmetic practitioners, disguising themselves as dermatologists and anticipating many adverse effects. Conclusion We believe that we need to pool our wisdom to solve these problems and expect that this study will provide valuable basic data for solving these problems in the dermatology and medical environments of Korea.

Background: The number of general cosmetic practitioners impersonating dermatologists in Korea has increased, leading to serious harm that is significant enough to attract the attention of health authorities, which dermatologists are deeply concerned about. Objective: We conducted a survey targeting dermatologists to gather their opinions on the behavior, problems, and countermeasures of general cosmetic practitioners disguising themselves as dermatologists. Methods: A total of 280 dermatologists completed the survey between January and February 2024. The questions covered demographic characteristics, experiences of cosmetic general practitioners falsely introduced themselves as dermatologists, complications experienced by patients who received treatment after being mistaken for a dermatologist, the seriousness of the problem for cosmetic general practitioners impersonating dermatologists, and the relationship between the shortage of essential medical personnel and the phenomenon of cosmetic general practitioners disguising themselves as dermatologists. Results: Despite cases in which cosmetic general practitioners impersonate dermatologists, most dermatologists have not responded appropriately in many instances. Dermatologists have reported many cases of complications after receiving dermatological treatment from such cosmetic general practitioners. Most dermatologists are concerned about the serious problems of general cosmetic practitioners, disguising themselves as dermatologists and anticipating many adverse effects. Conclusion We believe that we need to pool our wisdom to solve these problems and expect that this study will provide valuable basic data for solving these problems in the dermatology and medical environments of Korea.

Background: This study investigated a safe and effective bolus dose and lockout time for patient-controlled sedation (PCS) with dexmedetomidine for dental treatments. The depth of sedation, vital signs, and patient satisfaction were investigated to demonstrate safety. Methods: Thirty patients requiring dental scaling were enrolled and randomly divided into three groups based on bolus doses and lockout times: group 1 (low dose group, bolus dose 0.05 µg/kg, 1-minute lockout time), group 2 (middle dose group, 0.1 µg/kg, 1-minute), and group 3 (high dose group, 0.2 µg/kg, 3-minute) (n = 10 each). ECG, pulse, oxygen saturation, blood pressure, end-tidal CO2 , respiratory rate, and bispectral index scores (BIS) were measured and recorded. The study was conducted in two stages: the first involved sedation without dental treatment and the second included sedation with dental scaling. Patients were instructed to press the drug demand button every 10 s, and the process of falling asleep and waking up was repeated 1-5 times.In the second stage, during dental scaling, patients were instructed to press the drug demand button. Loss of responsiveness (LOR) was defined as failure to respond to auditory stimuli six times, determining sleep onset. Patient and dentist satisfaction were assessed before and after experimentation. Results: Thirty patients (22 males) participated in the study. Scaling was performed in 29 patients after excluding one who experienced dizziness during the first stage. The average number of drug administrations until first LOR was significantly lower in group 3 (2.8 times) than groups 1 and 2 (8.0 and 6.5 times, respectively). The time taken to reach the LOR showed no difference between groups. During the second stage, the average time required to reach the LOR during scaling was 583.4 seconds. The effect site concentrations (Ce) was significantly lower in group 1 than groups 2 and 3. In the participant survey on PCS, 8/10 in group 3 reported partial memory loss, whereas 17/20 in groups 1 and 2 recalled the procedure fully or partially. Conclusion PCS with dexmedetomidine can provide a rapid onset of sedation, safe vital sign management, and minimal side effects, thus facilitating smooth dental sedation.

Background/Aims: A poor prognostic factor for Crohn’s disease (CD) includes perianal fistulizing disease, including perianal fistula and/or perianal abscess. Currently, a tool to assess perianal symptoms in patients with CD remains nonexistent. This study aimed to develop a perianal fistulizing disease self-screening questionnaire for patients with CD. Methods: This prospective pilot study was conducted at three tertiary referral centers between January 2019 and May 2020. We formulated questions on perianal symptoms, including tenesmus, anal discharge, bleeding, pain, and heat. A 4-point Likert scale was used to rate each question. Patients with CD completed a questionnaire and underwent pelvic magnetic resonance imaging (MRI). Results: Overall, 93 patients were enrolled, with 51 (54.8%) diagnosed with perianal fistulizing disease, as determined by pelvic MRI. The Spearman correlation findings demonstrated that anal pain (p = 0.450, p < 0.001) and anal discharge (p = 0.556, p < 0.001) were the symptoms that most significantly correlated with perianal disease. For anal pain and discharge, the area under the receiver operating characteristic curve of the scores was significantly higher than that of the combined score for all five symptoms (0.855 vs. 0.794, DeLong’s test p = 0.04). For the two symptoms combined, the sensitivity, specificity, and positive predictive and negative predictive values were 88.2, 73.8, 80.4, and 83.8%, respectively, with 81.7% accuracy for detecting perianal fistulizing disease. Conclusions This study indicates that simple questions regarding anal pain and discharge can help accurately identify the presence of perianal fistulizing disease in patients with CD.

Background: To report the long-term clinical and radiologic results of impaction bone grafting and standard cemented polished stem for femoral revision arthroplasty in patients with extensive bone deficiency. Methods: We retrospectively reviewed 47 hips that underwent femoral revision hip arthroplasty using an impaction-morselized allograft with a standard cemented polished stem. The average age at the time of revision hip arthroplasty was 55 years (range, 39–75 years). The modified Harris hip score (HHS) was used for clinical evaluation. The radiologic evaluation focused on stem subsidence, stem position, progressive radiolucent lines, bone remodeling, and the incorporation of allografts. Results: The modified HHS improved from an average of 55.04 (range, 25–79.5) preoperatively to 90.1 (range, 81–93.2) at the last follow-up. The mean follow-up duration was 13.5 years (10.9–17.8 years). The radiographic analysis revealed stable stems.Femoral stems showed an average subsidence of 3.2 mm (range, 2–8 mm) in the cement mantle. However, there was no mechanical failure or subsidence of the cement mantle in the femurs. The stem position was neutral or varus less than 5°. No progressive radiolucent line or osteolysis was observed. Evidence of cortical and trabecular remodeling was observed in all cases. There were four cases of intraoperative cracks and four cases of distal femur splitting. Conclusions Initial stem stability using impaction bone grafting and a standard cemented polished stem in femoral revision arthroplasty resulted in good outcome. Delicate impaction grafting techniques and intraoperative crack and splitting fixation are the points that need attention for successful long-term results.

Background/Aims: Besifovir dipivoxil maleate (BSV), an acyclic nucleotide phosphonate, shows potent antiviral activity against hepatitis B virus. Our previous 48-week trial revealed that BSV has comparable antiviral efficacy to tenofovir disoproxil fumarate (TDF) and better safety profiles in terms of improved renal and bone safety. This extension study evaluated the prolonged efficacy and safety of BSV in treatment-naive chronic hepatitis B patients. Methods: Patients continued to participate in an open-label BSV study after an initial 48-week double-blind comparison of BSV and TDF treatment. The antiviral efficacy and drug safety was evaluated up to 192 weeks in two groups: patients continuing BSV treatment (BSV-BSV) and patients switching from TDF to BSV after 48 weeks (TDF-BSV). Results: Among 197 patients receiving randomized treatments, 170 (86%) entered the open-label phase and 152 (77%) entered the 192-week extension study. Virological response rates over 192 weeks were 92.50% and 93.06% in the BSV-BSV and TDF-BSV groups, respectively (P=0.90). Hepatitis B envelop antigen seroconversion and alanine aminotransferase normalization rates were similar between the groups (P=0.75 and P=0.36, respectively). There were no drug-resistant mutations to BSV. Bone mineral density and renal function were well preserved in the BSV-BSV group, whereas these initially worsened then recovered after switching therapy in the TDF-BSV group. Conclusions BSV maintained potent antiviral efficacy after 192 weeks and showed no evidence of drug resistance. BSV was safe, well tolerated, and effective in patients who switched from TDF to BSV. Trial Registration Number: NCT01937806 (date: 10 Sep 2013).

Nontuberculous mycobacteria are ubiquitous environmental organisms that are rare pathogens in immunocompetent individuals. However, cutaneous nontuberculous mycobacteria infections have been increasingly associated with invasive procedures, including surgery, liposuction, filler injection, intramuscular injection, mesotherapy, piercing, acupuncture, and cupping therapy. Herein, we report the first case of cutaneous nontuberculous mycobacteria infection caused by the East-Asian traditional treatment ‘Gua Sha’, also known as scraping, coining or spooning in English. A 35-year-old healthy female presented with widespread, painful skin nodules and pustules on her upper and lower extremities that had developed after Gua Sha treatment for body contouring. Histopathologic examination of the lesions revealed granulomatous inflammation in the dermis and the culture isolates were identified as Mycobacterium massiliense with molecular identification. The patient was successfully treated with intermittent incision and drainage of persistent nodules and oral clarithromycin based on antimicrobial susceptibility testing. We recommend implementation of a standard safety protocol for Gua Sha practitioners to minimize the risk of infection transmission.