Introduction Angiokeratoma corporis diffusum are benign capillary malformations typically associated with Fabry disease and other lysosomal storage disorders. Only in a few cases they appear in healthy individuals. Methods and Case We carried out an exhaustive review of the literature on angiokeratomas and their main clinical, dermoscopy and histological features. Additionally, we reviewed the cases of healthy subjects illustrating the limitations of each case and comparing these results with our case. Discussion Angiokeratoma corporis diffusum is mostly related to Fabry disease and other lysosomal storage disorders. However, some cases may occur in apparently healthy individuals. Therefore, there is a increasing interest in its etiology, pathogenesis and clinical evaluation. Conclusion This is an academic–clinical review on angiokeratomas and their main implications in daily dermatological practice. Additionally, we report the first case in the literature of angiokeratoma corporis diffusum in a healthy patient with up‐to‐date laboratory methods currently available. The clinician should remember that not all angiokeratoma corporis diffusum occurs with lysosomal storage disorders.
Background. Onychoscopy is a technique that uses a dermatoscope for the evaluation of specific features of different skin conditions that are not visible to the naked eye. There are few studies establishing parameters for the diagnosis of onychomycosis based on onychoscopy. Determining the sensitivity and specificity of a potentially new diagnostic test for onychomycosis requires an evaluation study of this new diagnostic test, as there are limited studies reporting onychoscopy results. Aim. To determine the sensitivity, specificity, positive predictive value and negative predictive value of onychoscopy findings in a Colombian population with onychomycosis. Methods. We assessed outpatients with a diagnosis of toenail onychomycosis confirmed by potassium hydroxide preparation or fungal culture. Onychoscopy was performed using a dermatoscope, and digital images collected using a smartphone. Results. The onychoscopy findings were: longitudinal striae, distal spiked pattern, distal irregular termination, linear edge and ruins aspect, while some patients were confirmed as having traumatic onycholysis. A statistically significant association was found between the clinical symptoms of onychomycosis and both the clinical feature of dyschromia and the onychoscopy feature of longitudinal striae. Conclusion. We suggest that this technique is an alternative method that should be used in patients with onychopathies because it has the potential to differentiate onychomycosis from traumatic onycholysis and another nail involvement.
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