espanolObjetivo: Describir las caracteristicas clinicas y dermatoscopicas presentadas en pacientes con sindrome de una fragil (SUF), no secundario a enfermedad dermatologica, en dos centros especializados colombianos. Material y metodos: Estudio cross sectional descriptivo. Se captaron, prospectivamente, pacientes mayores de 18 anos con SUF atendidos por el servicio de consulta dermatologica de la Clinica Universitaria Bolivariana y un centro de consulta privada desde octubre de 2015 a febrero de 2017 en Medellin, Colombia. Se evaluaron datos demograficos, comorbilidades, signos, sintomas, examen clinico y dermatoscopico de cuatro unas de las manos y se determino presencia o ausencia de afectacion en los pies. Se indago ademas sobre la percepcion de calidad de vida. Resultados: Se evaluaron 62 pacientes y 248 unas con SUF en las manos; 91.9% fueron mujeres con una mediana de edad de 53 anos (RIQ: 31-61). En 20.9% se reporto al menos una comorbilidad. Los sintomas ungulares referidos fueron: 96.8% ruptura, 93.5% unas debiles, 67.7% falta de crecimiento y 25.8% dolor; 67.7% perciben afectacion de la calidad de vida; la mediana de duracion de sintomas fue 12 meses (RIQ: 6-24); 22.6% reportaron compromiso de las unas de los pies. Los signos clinicos y hallazgos dermatoscopicos fueron respectivamente: 76.2-84.7% onicorrexis, 64.9-79.8% onicosquisis, 9.7-10.1% ruptura de bordes laterales y 5.2-8.5% divisiones longitudinales EnglishObjective: To describe the clinical and dermatoscopical characteristics of patients with a diagnosis of nail fragility syndrome (NFS) not secondary to dermatological disease in two specialized Colombian centers. Material and methods: Cross sectional descriptive study. Patients older than 18 years with NFS who were evaluated at either in Clinica Universitaria Bolivariana dermatology service or a private practice dermatology center ranging from October 2015 to February 2017 were prospectively enrolled. Demographic data, comorbidities, signs, symptoms, clinical and dermatoscopic examination of four nails were evaluated and the presence or absence of affectation in the toenails was determined as well. The perception of quality of life was inquired. Results: 62 patients and 248 nails with NFS in the hands were evaluated; 91.9% were women and the median age was 53 years (RIQ: 31-61). At least one comorbidity was reported in 20.9%. The reported ungular symptoms were 96.8% rupture, 93.5% weak nails, 67.7% lack of growth and 25.8% pain; 67.7% of patients perceived impairment of quality of life and median duration of symptoms was 12 months (RIQ: 6-24); 22.6% reported toenail involvement. Clinical signs and dermatoscopic findings were respectively: 76.2-84.7% onicorrexis, 64.9-79.8% onychosis, 9.7-10.1% lateral border rupture and 5.2-8.5% longitudinal divisions