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espanolLa sarna costrosa corresponde a una variedad muy rara y poco frecuente de escabiosis; una parasitosis humana causada por el acaro Sarcoptes Scabiei (var. Hominis); se produce principalmente en pacientes inmunodreprimidos y se caracteriza por lesiones atipicas y extensas, sumamente contagiosas debido al compromiso inmunitario. Se presenta el caso clinico de un paciente de 68 anos de edad con antecedentes de hipertension arterial y diabetes mellitus tipo 2 con un mal control glucemico, que es atendido por el servicio de dermatologia. Las lesiones se presentan como placas extensas pruriginosas, queratosicas, eritemato-escamosas de escamas gruesas y adherentes de seis meses de evolucion en tronco, muslos y pliegues axilares, inguinales e interdigitales. La sospecha clinica de sarna costrosa fue confirmada por biopsia; el tratamiento se realizo con ivermectina con mejoria del cuadro clinico. EnglishCrusted scabies corresponds to a very rare variety and little common scabies; a human parasitic disease caused by an acarid in this case Sarcoptes Scabiei (var. Hominis); it observed mainly among inmunosupressed patients and is characterized by atypical and extensive lesions, highly contagious due to their immune compromise. A case of a patient of 68 years old is described with a history of hypertension and diabetes mellitus type 2 with poor glycemic control, which is assist by the dermatology service. Lesions included extensive and pruritic badges, quetatotic, erythematous-squamous of thick and adherent scales of six months evolution in trunk, thighs and axillary, inguinal and interdigital folds. The clinical suspicion of crusted scabies was confirmed by biopsy; the treatment was performed with ivermectin with improvement of the clinical picture.