Improving Skin Cancer Diagnostics Through a Mobile App With a Large Interactive Image Repository: Randomized Controlled Trial.

BACKGROUND: Skin cancer diagnostics is challenging, and mastery requires extended periods of dedicated practice. OBJECTIVE: The aim of the study was to determine if self-paced pattern recognition training in skin cancer diagnostics with clinical and dermoscopic images of skin lesions using a large-scale interactive image repository (LIIR) with patient cases improves primary care physicians' (PCPs') diagnostic skills and confidence. METHODS: A total of 115 PCPs were randomized (allocation ratio 3:1) to receive or not receive self-paced pattern recognition training in skin cancer diagnostics using an LIIR with patient cases through a quiz-based smartphone app during an 8-day period. The participants' ability to diagnose skin cancer was evaluated using a 12-item multiple-choice questionnaire prior to and 8 days after the educational intervention period. Their thoughts on the use of dermoscopy were assessed using a study-specific questionnaire. A learning curve was calculated through the analysis of data from the mobile app. RESULTS: On average, participants in the intervention group spent 2 hours 26 minutes quizzing digital patient cases and 41 minutes reading the educational material. They had an average preintervention multiple choice questionnaire score of 52.0% of correct answers, which increased to 66.4% on the postintervention test; a statistically significant improvement of 14.3 percentage points (P<.001; 95% CI 9.8-18.9) with intention-to-treat analysis. Analysis of participants who received the intervention as per protocol (500 patient cases in 8 days) showed an average increase of 16.7 percentage points (P<.001; 95% CI 11.3-22.0) from 53.9% to 70.5%. Their overall ability to correctly recognize malignant lesions in the LIIR patient cases improved over the intervention period by 6.6 percentage points from 67.1% (95% CI 65.2-69.3) to 73.7% (95% CI 72.5-75.0) and their ability to set the correct diagnosis improved by 10.5 percentage points from 42.5% (95% CI 40.2%-44.8%) to 53.0% (95% CI 51.3-54.9). The diagnostic confidence of participants in the intervention group increased on a scale from 1 to 4 by 32.9% from 1.6 to 2.1 (P<.001). Participants in the control group did not increase their postintervention score or their diagnostic confidence during the same period. CONCLUSIONS: Self-paced pattern recognition training in skin cancer diagnostics through the use of a digital LIIR with patient cases delivered by a quiz-based mobile app improves the diagnostic accuracy of PCPs. TRIAL REGISTRATION: ClinicalTrials.gov NCT05661370; https://classic.clinicaltrials.gov/ct2/show/NCT05661370.

Experiences Regarding Use and Implementation of Artificial Intelligence-Supported Follow-Up of Atypical Moles at a Dermatological Outpatient Clinic: Qualitative Study.

BACKGROUND: Artificial intelligence (AI) is increasingly used in numerous medical fields. In dermatology, AI can be used in the form of computer-assisted diagnosis (CAD) systems when assessing and diagnosing skin lesions suspicious of melanoma, a potentially lethal skin cancer with rising incidence all over the world. In particular, CAD may be a valuable tool in the follow-up of patients with high risk of developing melanoma, such as patients with multiple atypical moles. One such CAD system, ATBM Master (FotoFinder), can execute total body dermoscopy (TBD). This process comprises automatically photographing a patient´s entire body and then neatly displaying moles on a computer screen, grouped according to their clinical relevance. Proprietary FotoFinder algorithms underlie this organized presentation of moles. In addition, ATBM Master's optional convoluted neural network (CNN)-based Moleanalyzer Pro software can be used to further assess moles and estimate their probability of malignancy. OBJECTIVE: Few qualitative studies have been conducted on the implementation of AI-supported procedures in dermatology. Therefore, the purpose of this study was to investigate how health care providers experience the use and implementation of a CAD system like ATBM Master, in particular its TBD module. In this way, the study aimed to elucidate potential barriers to the application of such new technology. METHODS: We conducted a thematic analysis based on 2 focus group interviews with 14 doctors and nurses regularly working in an outpatient pigmented lesions clinic. RESULTS: Surprisingly, the study revealed that only 3 participants had actual experience using the TBD module. Even so, all participants were able to provide many notions and anticipations about its use, resulting in 3 major themes emerging from the interviews. First, several organizational matters were revealed to be a barrier to consistent use of the ATBM Master's TBD module, namely lack of guidance, time pressure, and insufficient training. Second, the study found that the perceived benefits of TBD were the ability to objectively detect and monitor subtle lesion changes and unbiasedness of the procedure. Imprecise identification of moles, inability to photograph certain areas, and substandard technical aspects were the perceived weaknesses. Lastly, the study found that clinicians were open to use AI-powered technology and that the TBD module was considered a supplementary tool to aid the medical staff, rather than a replacement of the clinician. CONCLUSIONS: Demonstrated by how few of the participants had actual experience with the TBD module, this study showed that implementation of new technology does not occur automatically. It highlights the importance of having a strategy for implementation to ensure the optimized application of CAD tools. The study identified areas that could be improved when implementing AI-powered technology, as well as providing insight on how medical staff anticipated and experienced the use of a CAD device in dermatology.

Effect of Histopathological Explanations for Dermoscopic Criteria on Learning Curves in Skin Cancer Training: a Randomized Controlled Trial.

INTRODUCTION: Case-based training improves novices pattern recognition and diagnostic accuracy in skin cancer diagnostics. However, it is unclear how pattern recognition is best taught in conjunction with the knowledge needed to justify a diagnosis. OBJECTIVES: The aim of this study was to examine whether an explanation of the underlying histopathological reason for dermoscopic criteria improves skill acquisition and retention during case-based training in skin cancer diagnostics. METHODS: In this double-blinded randomized controlled trial, medical students underwent eight days of case-based training in skin cancer diagnostics, which included access to written diagnosis modules. The modules dermoscopic subsections differed between the study groups. All participants received a general description of the criteria, but the intervention group additionally received a histopathological explanation. RESULTS: Most participants (78%) passed a reliable test in skin cancer diagnostics, following a mean training time of 217 minutes. Access to histopathological explanations did not affect participants' learning curves or skill retention. CONCLUSIONS: The histopathological explanation did not affect the students, but the overall educational approach was efficient and scalable.

Evaluation of dynamic dermoscopic features of melanoma and benign naevi by sequential digital dermoscopic imaging and total body photography in a high-risk Australian cohort.

BACKGROUND/OBJECTIVES: Sequential digital dermoscopic imaging (SDDI) and total body photography (TBP) are recommended as a two-step surveillance method for individuals at high-risk of developing cutaneous melanoma. Dermoscopic features specific to melanoma have been well described, however, dynamic changes on serial imaging are less understood. This study aims to identify and compare dermoscopic features in developing melanomas and benign naevi that underwent SDDI and TBP to understand which dermoscopic features may be associated with a malignant change. METHOD: Histopathology reports from a private specialist dermatology clinic from January 2007 to December 2019 were reviewed. Histopathologically confirmed melanoma and benign naevi that underwent SDDI and TBP with a minimum follow-up interval of 3 months were included. RESULTS: Eighty-nine melanomas (38.2% invasive, median Breslow thickness 0.35 mm, range: 0.2-1.45 mm) and 48 benign naevi were evaluated by three experienced dermatologists for dermoscopic changes. Features most strongly associated with melanoma included the development of neovascularisation, asymmetry and growth in pigment network, additional colours, shiny white structures, regression, structureless areas and change to a multi-component pattern. The presence of atypical vessels (p = 0.02) and shiny white structures (p = 0.02) were significantly associated with invasive melanoma. CONCLUSION: Evaluation for certain evolving dermoscopic features in melanocytic lesions monitored by SDDI and TBP is efficient in assisting clinical decision making. SDDI with TBP is an effective tool for early detection of melanoma.

A cost-minimization analysis comparing teledermoscopy and face-to-face evaluations of suspicious skin lesions in Southern Denmark.

INTRODUCTION: Skin cancers are common in European populations and generate considerable costs. In Denmark, patients with suspicious skin lesions will usually consult their general practitioner who may refer the patient to a dermatologist or plastic surgeon if necessary. However, it is also possible for the general practitioner to take and send dermoscopic and macroscopic photographs of the suspicious skin lesion for evaluation by a dermatologist, so-called teledermoscopy. This study aims to calculate and compare costs of teledermoscopy and standard care in the form of face-to-face evaluation by a dermatologist of suspicious skin lesions referred by general practitioners in the Region of Southern Denmark. METHODS: A cost-minimization study was performed. Investment costs, costs in general practice, hospital-associated costs and patient costs were included to calculate the average cost per patient episode. RESULTS: The overall cost of teledermoscopy was €17.2-€23.1 higher than that of standard care. However, hospital-associated costs and patient costs were reduced. DISCUSSION: The total cost of teledermoscopy was slightly higher than the cost of standard care. Sensitivity analyses indicated that the number of preventable face-to-face evaluations and the distance to the dermatologist were the two factors that influenced costs the most.

A case series evaluating microwave-based therapy for axillary hyperhidrosis and bromhidrosis.

INTRODUCTION: Axillary hyperhidrosis and bromhidrosis have serious social, emotional, and professional consequences. There are several treatments of axillary hyperhidrosis. We present a case series evaluating the efficacy and safety of microwave device for axillary hyperhidrosis and bromhidrosis. MATERIALS AND METHODS: Seven patients were included in our case series. Four patients had both hyperhidrosis and bromhidrosis. Three patients had only hyperhidrosis. To evaluate the degree of hyperhidrosis and degree bromhidrosis a self-reported Hyperhidrosis Disease Severity Scale (HDSS) score and 4-point malodor grade were assessed. All patients underwent 1 or 2 microwave treatments. Patients underwent a survey on treatment outcomes and adverse effect conducted through telephone 12 months after their last procedure. RESULTS: Six of seven patients had a 2-point drop in HDSS score. The four patients with bromhidrosis had a 2-point drop on the self-reported malodor measurement 12 months post treatment. Minor adverse effects related to the therapy occurred. CONCLUSION: This novel microwave-based treatment was effective for the treatment of axillary hyperhidrosis and bromhidrosis. Patient satisfaction with the procedure is high, and adverse events are typically transient and well tolerated.

Acceptance of Teledermoscopy by General Practitioners and Dermatologists in Denmark.

BACKGROUND: Teledermoscopy can be used to triage referrals of suspected skin cancers, thereby reducing waiting time and number of face-to-face consultations with a dermatologist. However, the success of the implementation of this technology in part relies on the acceptance of the providers. OBJECTIVES: This study assessed the attitudes towards teledermoscopy of referring general practitioners and consultant dermatologists. METHODS: General practitioners from 48 practices and 3 dermatologists in the region of Southern Denmark, who had previous experience with teledermoscopy, were invited to answer questionnaires on their acceptance of the technology. RESULTS: General practitioners from 23 practices responded. All domains of the questionnaire received high scores, indicating a high degree of acceptance of teledermoscopy among respondents. All 3 dermatologists agreed that teledermoscopy was useful for triaging referrals, but they were less confident in their diagnoses and management plans proposed by teledermoscopy than in traditional face-to-face evaluations of patients. Two of the 3 dermatologists were satisfied with using teledermoscopy as a consult method. CONCLUSIONS: This study reports high levels of provider acceptance of teledermoscopy. However, a low response rate among general practitioners may limit its generalizability.

Introducing teledermoscopy of possible skin cancers in general practice in Southern Denmark.

BACKGROUND: The increasing incidence of skin cancers poses a burden to health care systems. General practitioners (GPs) play an important role in triaging these diseases and referring relevant patients to specialists. It is challenging to distinguish benign from malignant skin lesions, and GPs may benefit from diagnostic support from teledermoscopy (TD). OBJECTIVES: To assess whether the introduction of TD in general practice was feasible and might reduce the number of unnecessary referrals to specialists and to assess the diagnostic accuracy and confidence of participating GPs. METHODS: Fifty general practices in Southern Denmark participated. Adult patients presenting to their GP with suspected skin cancer could be included. Images including dermoscopy were taken by the GP and sent for evaluation by specialized dermatologists at a university hospital. Patients were simultaneously referred for a face-to-face evaluation at the university hospital. Diagnoses proposed by the GPs and by TD were compared to the final diagnoses obtained by histopathology or, if not available, face-to-face evaluation. RESULTS: Five hundred and nineteen patients with 600 suspected skin cancers were included. The final diagnosis was benign in 72.3%. The photo quality was good or fair in 90.5%. GPs reported uncertainty about their diagnoses in 41.5% of cases. The GPs' positive predictive values for any malignancy and for malignant melanoma were 49.5% and 26.3%, respectively. On evaluation by TD, 31.5% of lesions did not need further in-person assessment. CONCLUSION: Useful images of suspicious skin lesions were obtained from general practice, and GPs could benefit from TD to improve their diagnostic accuracy and confidence.

Patient Satisfaction and Expectations Regarding Mobile Teledermoscopy in General Practice for Diagnosis of Non-melanoma Skin Cancer and Malignant Melanoma.

The incidence of non-melanoma skin cancer and malignant melanoma is increasing. Diagnosing these skin lesions is primarily done visually, making it suitable to use new technology, such as teledermoscopy. Before the implementation of teledermoscopy, patient satisfaction, clinician satisfaction and diagnostic accuracy, need to be evaluated. A cross-sectional quantitative survey was conducted to evaluate patient satisfaction and expectations regarding a mobile teledermoscopy service, and to identify factors influencing patient satisfaction and choice of diagnostic method. A total of 287 out of 476 participants responded to the questionnaire. Almost 90% of respondents were satisfied with, or neutral towards, teledermoscopy. No associations between patient satisfaction and age, smartphone/tablet usage, travel time, prior history of non-melanoma skin cancer and malignant melanoma, or worries about malignancy, were found. There was equal distribution between patients who preferred teledermoscopy and those who preferred face-to-face consultation. Respondents with a high level of smartphone usage significantly preferred teledermoscopy.

Skin Cancer Associated Genodermatoses: A Literature Review.

Skin cancer has become the most common type of cancer worldwide as a result of environmental exposure and medical treatments. A small group of patients are genetically predisposed to skin cancer and this article is intended as a diagnostic tool when encountering patients with multiple skin cancer lesions. The disorders are described with clinical characteristics, genetics and management. The most common syndromes associated with basal cell carcinoma are: Gorlin-Goltz syndrome, Rombo syndrome, and Bazex-Dupré-Christol syndrome. Multiple squamous cell carcinomas can be related to: xeroderma pigmentosum, Ferguson-Smith, Muir-Torre syndrome, Mibelli-type porokeratosis, keratitis-ichthyosis-deafness syndrome, Rothmund-Thomson syndrome, Bloom syndrome, and epidermodysplasia verruciformis. Malignant melanoma can be inherited, as in familial atypical multiple mole melanoma syndrome.

[Treatment algorithm for non-melanoma skin cancer].

Non-melanoma skin cancers are the most common malignant neoplasms in Denmark. The majority of cases are basal cell carcinomas (BCC) and squamous cell carcinomas (SCC). The choice of treatment depends on tumour, area, histology and patient-specific factors. Superficial and low-risk BCC can be treated with curettage, photodynamic therapy, imiquimod cream or cryotherapy. High-risk BCC and SCC should be treated by surgical excision or radiotherapy.

Eruptive nevi after burn injury.

Eruptive melanocytic nevi (EMN) is an unusual phenomenon characterized by the abrupt development of multiple melanocytic nevi over weeks to months in association with an underlying trigger. The underlying mechanisms are not fully understood, however, they have been associated with a variety of conditions. EMN is relatively uncommon and might be underreported due to the absence of close monitoring, insufficient recognition, and the presumed benign course of the condition. We describe the first case report of acral EMN associated with a burn wound on a 2-year-old child. Familiarity is important to differentiate EMN from neoplasms.

The Danish Nonmelanoma Skin Cancer Dermatology Database.

AIM OF DATABASE: The Danish Nonmelanoma Skin Cancer Dermatology Database was established in 2008. The aim of this database was to collect data on nonmelanoma skin cancer (NMSC) treatment and improve its treatment in Denmark. NMSC is the most common malignancy in the western countries and represents a significant challenge in terms of public health management and health care costs. However, high-quality epidemiological and treatment data on NMSC are sparse. STUDY POPULATION: The NMSC database includes patients with the following skin tumors: basal cell carcinoma (BCC), squamous cell carcinoma, Bowen's disease, and keratoacanthoma diagnosed by the participating office-based dermatologists in Denmark. MAIN VARIABLES: Clinical and histological diagnoses, BCC subtype, localization, size, skin cancer history, skin phototype, and evidence of metastases and treatment modality are the main variables in the NMSC database. Information on recurrence, cosmetic results, and complications are registered at two follow-up visits at 3 months (between 0 and 6 months) and 12 months (between 6 and 15 months) after treatment. DESCRIPTIVE DATA: In 2014, 11,522 patients with 17,575 tumors were registered in the database. Of tumors with a histological diagnosis, 13,571 were BCCs, 840 squamous cell carcinomas, 504 Bowen's disease, and 173 keratoakanthomas. CONCLUSION: The NMSC database encompasses detailed information on the type of tumor, a variety of prognostic factors, treatment modalities, and outcomes after treatment. The database has revealed that overall, the quality of care of NMSC in Danish dermatological clinics is high, and the database provides the necessary data for continuous quality assurance.

[Syphilis during pregnancy]. / Syfilis hos gravide.

The incidence of syphilis in Denmark is rising. In 2010, 377 new cases of syphilis were reported, 36 of these cases in women. Since January 1st 2010 all pregnant women are offered an antenatal syphilis test. This resulted in the finding of seven cases of syphilis among pregnant women in 2010. This article summarises the clinical and serological findings in syphilis and describes the treatment of the disease, with focus on pregnancy and congenital infection.

[Syphilis diagnosed by antenatal screening]. / Syfilis påvist ved screening i graviditeten.

Because of an increasing incidence of syphilis in Denmark, antenatal screening was re-introduced in 2010. We present two cases of latent syphilis diagnosed by antenatal screening alone. Neither of the two women recalled any previous symptoms of the disease. After treatment, both women gave birth to healthy children.