BACKGROUND: Nail diseases are often associated with significant physical and psychosocial burden, but diagnosis is challenging due to non-specific clinical and histological findings. Nail fold capillaroscopy has been studied for diagnosis of systemic diseases, but studies on nail diseases are lacking.
OBJECTIVE: Our objectives were to characterize and compare capillary changes in a set of nail conditions vs. controls, between nail groups, and based on demographic/clinical criteria.
METHODS: This was a prospective cross-sectional study of patients with nail psoriasis, onychomycosis, idiopathic onycholysis, brittle nail syndrome, nail lichen planus, retronychia, other nail conditions, and no nail findings (controls) undergoing capillaroscopy imaging/analysis.
RESULTS: Nail psoriasis vs. control patients demonstrated decreased capillary length/density and increased abnormal capillaries, with higher frequency in older, male patients. Onychomycosis was associated with increased meandering capillaries compared to controls, nail psoriasis, and nail lichen planus. Retronychia is associated with increased disorganized polymorphic capillaries compared to controls and onychomycosis.
CONCLUSIONS: Limitations include small sample size for certain nail conditions and small numbers of nail psoriasis patient with psoriatic arthritis.
CONCLUSIONS: Our findings highlight nailfold capillaroscopy as a potentially quick, cost-effective, and non-invasive imaging modality, as an adjunct for diagnosis and treatment initiation for patients with onychodystrophies.

Anderson-Fabry disease (AFD) is a genetic lysosomal storage disorder caused by mutations in the α-galactosidase A gene, leading to impaired lysosomal function and resulting in both macrovascular and microvascular alterations. AFD patients often exhibit increased intima-media thickness (IMT) and reduced flow-mediated dilation (FMD), indicating non-atherosclerotic arterial thickening and the potential for cardiovascular events. Nailfold capillaroscopy, a non-invasive diagnostic tool, has shown potential in diagnosing and monitoring microcirculatory disorders in AFD, despite limited research. This study evaluates nailfold capillaroscopy findings in AFD patients, exploring correlations with GLA gene variant subgroups (associated with classical or late-onset phenotypes and variants of uncertain significance (VUSs)), and assessing morpho-functional differences between sexes. It aims to determine whether capillaroscopy can assist in the early identification of individuals with multiorgan vascular involvement. A retrospective observational study was conducted with 25 AFD patients from AOUP \"G. Rodolico-San Marco\" in Catania (2020-2023). Patients underwent genetic testing, enzyme activity evaluation, and nailfold capillaroscopy using Horus basic HS 200 videodermatoscopy. Parameters like angiotectonic disorder, vascular areas, capillary density, and intimal thickening were assessed. The study identified significant differences in capillaroscopy findings among patients with different GLA gene variant subgroups. Classic AFD variant patients showed reduced capillary length and signs of erythrocyte aggregation and dilated subpapillary plexus. No correlation was found between enzymatic activity and capillaroscopy parameters. However, Lyso-Gb3 levels were positively correlated with average capillary length (ῤ = 0.453; p = 0.059). Sex-specific differences in capillaroscopy findings were observed in neoangiogenesis and average capillary length, with distinct implications for men and women. This study highlights the potential of nailfold capillaroscopy in the diagnostic process and clinical management of AFD, particularly in relation to specific GLA gene mutations, as a valuable tool for the early diagnosis and monitoring of AFD.

Gender, through genetic, epigenetic and hormonal regulation, is an important modifier of the physiological mechanisms and clinical course of diseases. In diabetes mellitus, there are gender differences in incidence, prevalence, morbidity, and mortality. This disease also has an impact on the microvascular function. Therefore, this cross-sectional study was designed to investigate how gender affects the cutaneous microcirculation. We hypothesized that gender should be an important factor in the interpretation of capillaroscopy and transcutaneous oxygen saturation results. The study group consisted of 42 boys and 55 girls, uncomplicated diabetic pediatric patients. Females (F) and males (M) did not differ in terms of age, age at onset of diabetes, or diabetes duration. Furthermore, they did not differ in metabolic parameters. The comparison showed that group F had lower BP, higher pulse, and higher HR than group M. Group F had significantly lower creatinine and hemoglobin levels than group M. In children and adolescents with type 1 diabetes without complications, there was a gender difference in microcirculatory parameters. The resting transcutaneous partial pressure of oxygen was significantly higher in females than in males. However, there were no gender-related differences in basal capillaroscopic parameters or vascular reactivity during the PORH test. Our results indicate that studies investigating the structure and function of the microcirculation should consider the role of gender in addition to known cofactors such as puberty, body mass index, physical activity, and cigarette smoking.

In the last decade, nailfold capillaroscopy is finding its way to the daily clinic of (pediatric) rheumatologist. This review will provide the necessary knowledge for the clinician performing this easy and non-invasive examination in children. In the first part, background information on type of capillaroscopy device and standardized (internationally validated) interpretations for the different capillary variables compared to healthy pediatric controls will be provided. The second part focusses on capillary changes that are observed in Raynaud\'s phenomenon with follow-up recommendations. This part will also cover capillaroscopy findings in juvenile systemic sclerosis, childhood-onset systemic lupus erythematosus, juvenile dermatomyositis and -mixed connective tissue disease, as well as correlations with disease severity. Lastly, a research agenda shows the current gaps we have in knowledge in this niche of nailfold capillaroscopy in pediatric connective tissue diseases.

UNASSIGNED: Nail-fold capillaroscopy is a non-invasive method for assessment of the microcirculation in nail folds. This examination is particularly useful for diagnosis, assessment of activity, evaluation of the response to treatment, and assessment of the correlation of changes in microvessels with changes in organs in systemic sclerosis and in scleroderma-spectrum diseases, i.e. dermatomyositis, polymyositis, mixed connective tissue disease, and undifferentiated connective tissue disease.
UNASSIGNED: To perform capillaroscopic analyses of lesions in patients with scleroderma-spectrum diseases and determine the correlation of the capillaroscopic image with organ manifestations and the serological profile.
UNASSIGNED: The study involved 15 patients with scleroderma-spectrum disorders.
UNASSIGNED: Mixed systemic connective tissue disease was diagnosed in 8 patients, and dermatomyositis was detected in 7 patients. The study assessed the frequency of clinical symptoms, e.g. interstitial lung disease or arthritis, and the presence of ANA antibodies. Scleroderma-like microangiopathy was diagnosed in 47% of patients with scleroderma-spectrum disorders. The early pattern was found in patients with mixed systemic connective tissue disease, whereas dermatomyositis was characterized by the late pattern. Non-specific changes were found in 27% of the patients, and a normal image was observed in 27% of the patients.
UNASSIGNED: The analysis also revealed that the reduced number of vessels correlated with the occurrence of interstitial lung disease, and the incidence of Raynaud\'s phenomenon and arthritis was statistically significantly higher in patients with systemic connective tissue disease than in those with dermatomyositis.

BACKGROUND: The \"scleroderma\" type capillaroscopic pattern is a reference pattern in rheumatology that is a diagnostic sign for systemic sclerosis (SSc) in an appropriate clinical context and is observed in more than 90% of scleroderma patients. Similar microvascular changes, the so-called \"scleroderma-like\", have been described albeit in a lower proportion of patients with other rheumatic diseases, such as dermatomyositis (DM), undifferentiated connective tissue diseases (UCTD), systemic lupus erythematosus (SLE), etc. Three distinct stages of \"scleroderma\" pattern have been suggested by Cutolo et al., i.e., \"early\", \"active\", and \"late\". However, disease duration is just one of the factors that contributes to the progression of microvascular changes, and in this regard, \"active\" or even \"late\" pattern could be observed in patients with shorter disease duration. In addition, stable microvascular changes could be found for long periods in other cases.
OBJECTIVE: The aim of the study was to assess the presence of differentiating features between \"scleroderma\" pattern in SSc and \"scleroderma-like\" pattern in other rheumatic diseases.
METHODS: 684 capillaroscopic images demonstrating a \"scleroderma\" and \"scleroderma-like\" pattern have been analysed in the current retrospective cross-sectional study. 479 capillaroscopic pictures were obtained from 50 SSc patients, 105 from 7 DM patients, 38 from 10 rheumatoid arthritis (RA) patients, 36 images from 5 patients with SLE, and 26 images from 9 patients with UCTD. All capillaroscopic images used in the current analysis have fulfilled the criteria for \"sclerderma/scleroderma-like\" pattern, as the pathological changes in the capillaroscopic parameters have also been confirmed by quantitative measurement of capillary diameters, capillary density, and intercapillary distance. All the images have been categorized into one of the following groups, i.e., \"early\", \"active\" and \"late\" phases (according to the definition of Cutolo et al.), or \"other\" findings, the latter being specifically described as they could not be attributed to one of the other three categories.
RESULTS: 479 capillaroscopic pictures were obtained from 50 scleroderma patients. 31 of them showed an \"early\", 391 an \"active\" phase, and 57 a \"late\" phase \"scleroderma\" type microangiopathy. In 69 images assessed as an \"active\" pattern, neoangiogenesis was found. In 43 out of 105 capillaroscopic pictures from DM patients, an \"active\" phase was detected; in 2 of the images, a \"late\" pattern was found, and in 60 capillaroscopic pictures, neoangiogenesis in combination with giant capillary loops was observed. Early microangiopathy was not found in this group. Among capillaroscopic images from SLE patients, \"late\" phase microangiopathy was not found. \"Early\" phase was present in 3 images, \"active\" phase in 29, neoangiogenesis in \"active\" phase in 4 pictures. Early microangiopathy was detected in 11 capillaroscopic pictures from RA patients (8 out of 9 patients), an \"active\" phase in 4 images (3 patients), and in 23 capillaroscopic images, neoangiogenesis with mild capillary derangement and capillary loss and single giant capillaries (\"rheumatoid neoangiogenic pattern\") were observed. Classic \"late\" type microangiopathy was not found in RA patients as well as among patients with UCTD. The predominant capillaroscopic pattern in UCTD patients was early microangiopathy (n = 23). The rest images from UCTD exhibited features of the \"active\" phase.
CONCLUSIONS: In conclusion, early microangiopathy was observed in RA, SLE, and UCTD patients, but not in patients with DM. An \"active\" phase \"scleroderma\" type capillaroscopic pattern was detected in all patient groups other than SSc, i.e., DM, SLE, RA, and UCTD. \"Late\" phase \"scleroderma\" type microangiopathy was present in patients with scleroderma and DM and was not observed in SLE, RA, and UCTD. Despite the fact that in some cases, microangiopathy in scleroderma and other rheumatic diseases may be indistinguishable, the results of the current research have shown the presence of some differentiating features between \"scleroderma\" and \"scleroderma-like\" microangiopathy that might be a morphological phenomenon associated with differences in the pathogenesis and the degree of microvascular pathology in various rheumatic diseases.

This study aimed to evaluate the earliest changes in the structure and function of the peripheral microcirculation using capillaroscopy and transcutaneous oxygen pressure measurement in children and adolescents with type 1 diabetes mellitus at baseline and during post-occlusive reactive hyperemia (PORH) in the function of diabetes duration. Sixty-seven patients with type 1 diabetes mellitus (T1D), aged 8 to 18 years, and twenty-eight age- and sex-matched healthy subjects were included in the analysis. Diabetic patients were divided into subgroups based on median disease duration. The subgroups differed in chronological age, lipid levels, and thyroid hormones. Capillaroscopy was performed twice: at baseline and then again after the PORH test. Transcutaneous oxygen pressure also was recorded under baseline conditions during and after the PORH test. Comparison of capillaroscopy and transcutaneous oxygen pressure parameters at rest and after the PORH showed no statistically significant difference between the subgroups. This remained true after adjusting for variables that differentiated the two subgroups. However, in the group of patients with long-standing diabetes, significant negative correlations were observed between the Coverage value after the PORH test and capillary reactivity with TcPO2_zero (biological zero). Significant positive correlations were also found between distance after the PORH test and TcPO2_zero. The results of our study indicate that in patients with a shorter duration of diabetes, the use of multiple tests provides a better characterization of the structure and function of microcirculation because the onset of dysfunction does not occur at the same time in all the tests.

Our aim in this study is to evaluate the cardiovascular findings of pediatric patients with primary Raynaud\'s phenomenon (RP) and to determine if there are any pathological findings. Our study included 42 pediatric patients aged between 7 and 18 who were diagnosed with primary RP and did not have any additional underlying structural vascular disease or secondary rheumatological conditions. The control group consisted of 30 healthy volunteers aged 7-18 years, matched by age and sex, without any additional diseases. We evaluated demographic, clinical, and laboratory findings, echocardiographic and capillaroscopic features, as well as carotid intima-media thickness. Compared to the control group, pediatric patients with primary RP showed increased A wave velocity and E/E\' ratio parameters in the left ventricle, indicating diastolic dysfunction of the heart. The isovolumetric relaxation time (IVRT) was prolonged in both the left and right ventricles, and the E/A ratio decreased in the left ventricle. The myocardial performance index (MPI), indicating both systolic and diastolic dysfunction, increased in both ventricles. Additionally, the aortic stiffness index, aortic elastic modulus (Ep), and left carotid intima-media thickness (CIMT) significantly increased, while distensibility decreased in pediatric patients with primary RP compared to the control group. The cardiovascular evaluation of pediatric patients with primary RP revealed that diastolic dysfunction is likely present in both the left and right heart. Additionally, based on the aorta and carotid intima measurements, it is suggested that pediatric patients with primary RP are at risk for developing atherosclerosis.

Nailfold Videocapillaroscopy (NVC) is a valuable tool in the differential diagnosis of Raynaud\'s phenomenon (RP), present in certain Rheumatic diseases (RD). Knowing that many people have cardiovascular risk factors (CVRF), the main objective was to demonstrate that CVRF and carotid plaques produce NVC alterations.
Cross-sectional unicentric study carried out from 2020 to 2023. Four groups were formed: subjects with RD and RP, participants with RD without RP, subjects with RP without RD and finally participants without RP or RD (study group). Each subject exhibiting CVRF presented only a single risk factor. The variables collected were: sociodemographic, CVRF (diabetes, tobacco, alcohol (ALC), obesity (OBE), dyslipidemia and arterial hypertension (AH)), diseases, RP, treatments, tortuosities and NVC alterations (ramified capillaries, enlarged capillaries, giant capillaries, haemorrhages and density loss) and carotid ultrasound (CU).
402 subjects were included (76 % women, mean age 51 ± 16 years), 67 % had CVRF, 50 % RP and 38 % RD. Tortuosities were present in 100 % of CVRF participants. A statistically significant association was found between the presence of CVRF and all the NVC alterations: ramified capillaries (OR = 95.6), enlarged capillaries (OR = 59.2), giant capillaries (OR = 8.32), haemorrhages (OR = 17.6) and density loss (OR = 14.4). In particular, an association was found between giant capillaries with AH (p = 0,008) and OBE (p 〈0,001), and haemorrhages and density loss with ALC and OBE (p < 0,001). On the other hand, 40 subjects presented CU plaques (9.9 %), associated with enlarged capillaries (OR = 8.08), haemorrhages (OR = 4.04) and ramified capillaries (OR = 3.01). The pathological intima-media thickness was also associated with haemorrhages (OR = 3.14).
There is a clear association between CVRF and ultrasound atherosclerotic findings in carotid with NVC alterations. These findings are of special interest for a correct NVC interpretation and to avoid false positives in the diagnosis of primary and secondary RP.

Objectives: Video capillaroscopy is a diagnostic method for evaluating microvascular changes in type 2 diabetes mellitus (T2DM). This study evaluated microvascular changes, including microvascular architecture, capillary distribution (morphology and density), and angiogenesis conditions in T2DM patients via video capillaroscopy. Methods: A total of 256 patients with T2DM enrolled in this study. Based on electromyography (EMG)-nerve conduction velocity results, patients were divided into patients with normal and abnormal EMG. Microalbuminuria was assessed using biochemical urine analysis. Finally, video capillaroscopy was performed to evaluate changes in microvascular architecture, capillary distribution, and angiogenesis status. Results: The differences between microalbuminuria in patients with normal and abnormal EMG were not significant. Other microvascular changes were not significant between normal and abnormal EMG groups. The patients with greater microalbuminuria were at risk of abnormal EMG 2.8 times higher than those with fewer microalbuminuria (odds ratio = 2.804; 1.034-7.601). However, EMG is not a risk factor for microvascular architecture alternation in T2DM (odds ratio = 1.069; 0.323-3.546). Conclusions: Microvascular alternations are common in T2DM and early detection of these changes could help to avoid the progress of nephropathic complications. Also, video capillaroscopy provides a promising diagnostic method for the detection of microvascular alternations in T2DM.