ABSTRACT DRESS syndrome (Drug Reaction with Eosinophilia and Systemic Symptoms) represents severe pharmacodermia with different clinical and paraclinical manifestations secondary to a drug hypersensitivity reaction. The exact incidence is unknown, but it is estimated to be between 1 in 1,000 and 1 in 10,000 cases of exposure to associated drugs. It is characterized by extensive generalized dermatosis, in conjunction with organic involvement, lymphadenopathy, eosinophilia, and atypical lymphocytosis. Commonly associated drugs include aromatic anticonvulsants, carbamazepine, sulfonamides, and allopurinol. By using the RegiSCAR score, it is possible to confirm or rule out a suspected diagnosis. Treatment depends on the severity of presentation, including topical steroids to systemic steroids of variable duration, depending on clinical and biochemical responses. Mortality rates of 10 - 20% have been reported, with liver failure being the main cause of death in these patients. We present the case of a 71-year-old female patient who, after treatment with allopurinol, developed erythroderma secondary to DRESS Syndrome.

RESUMEN El síndrome de DRESS (por sus siglas en inglés Drug Reaction with Eosinophilia and Systemic Symptoms) representa una farmacodermia grave con diferentes manifestaciones clínicas y paraclínicas secundarias a una reacción de hipersensibilidad farmacológica. Su incidencia exacta es desconocida pero se estima entre 1 a 1000 y 1 a 10000 casos de exposición a fármacos asociados. Se caracteriza por dermatosis generalizada extensa en conjunto con afección orgánica, linfadenopatia, eosinofilia y linfocitosis atípica. Entre los fármacos comúnmente asociados se encuentran anticomiciales aromáticos, carbamazepina, sulfonamidas y el alopurinol. Mediante el uso de la puntuación RegiSCAR es posible confirmar o descartar una sospecha de diagnóstico. El tratamiento depende de la severidad de presentación incluyendo esteroides tópicos hasta esteroide sistémico de duración variable dependiendo respuesta clínica y bioquímica. Se reporta tasas de mortalidad del 10 al 20% siendo la insuficiencia hepática la principal causa de muerte en estos pacientes. Se presenta el caso de un paciente femenino de 71 años de edad que, posterior a tratamiento con alopurinol, debuta con eritrodermia secundaria a Síndrome de DRESS.

BACKGROUND:Dermatophytes are the main causative agent of all onychomycosis, but genus Microsporum is infrequent and the risk of acquiring the infection is often associated with exposure to risk factors.OBJECTIVES:To describe clinical characteristics of onychomycosis due to Microsporum onychomycosis in an urban population.METHODS:This was a retrospective analysis of the epidemiological and clinical features of 18Microsporum onychomycosis cases of a total of 4220 of onychomycosis cases diagnosed between May 2008 and September 2011 at the tertiary referral center for mycology in Guatemala.RESULTS:Eighteen cases of Microsporum onychomycosis (M. canis, n=10; M. gypseum, n=7; M. nanum, n=1) were identified (prevalence=0.43%). Infection was limited to nails only and disease duration ranged from 1 month to 20 years (mean=6.55 years). The toenails were affected in all cases except for a single M. gypseum case of fingernail. The most common clinical presentation was distal lateral subungual onychomycosis (12/18) followed by total dystrophic onychomycosis (5/18), and superficial white onychomycosis (1/18). M. gypseumpresented in 6 cases as distal lateral subungual onychomycosis and in 1 case like total dystrophic onychomycosis. Five cases (27.78%) were associated with hypertension, diabetes, and psoriasis. Treatment with terbinafine or itraconazole was effective. Two cases of M. canisdistal lateral subungual onychomycosis responded to photodynamic therapy.CONCLUSION:This is the largest reported series of Microsporum onychomycosis and demonstrates such a disease in an urban population. In 27.78% of the cases risk factors for infection were associated to comorbid states. We also report the first 2 cases of successfully treated M. canis onychomycosis with photodynamic therapy and a rare case of M. canis associated dermatophytoma.