Compromiso cardiaco en pacientes con Mucopolisacaridosis tipo II (Enfermedad De Hunter) / Cardiac commitment in patients with type II Mucopolysaccharidosis. (Hunter's disease)

This report describes the cardiac involvement of patients with mucopolysaccharidoses Type II (Hunter disease). Mucopolysaccharidoses Type II are an uncommon group of about 50 rare inherited metabolic disorders, that result from defects in lysosomal dysfunction, usually as a consequence of deficiency of a single enzyme required for the metabolism of lipids, glycoproteins or so called mucoplysaccharides. Most of this diorders are autosomal recesively inherited such as Hunter syndrome Mucopolysacharidosis. Tuype II is a lisosomal storage disease caused by a deficiency of the lysosomal ensyme iduronate 2 sulfatase. its frequency is 1 to 100.000 to 150.000 male births; is farmore common in boys. Clinical, electrocardiographical and sonographical variables were determined. As a result 18 patients were evaluated; all the patients presented cardiac involvement. Color Doppler sonocardiogram was pathological in the 100% of the patients, and 4 of them, showed mitral/and or aortic, and 4 patients with miocardic hypoertrophy, and 1 patient, pulmonary hipertension. A clinical review is prsented, and a guide for management is detailed (AU)

Enfermedades por depósito lisosomal: diagnóstico a partir de lesiones cutáneas / Lysosomal storage diseases, diagnosis from skin lesions

Las enfermedades por depósito lisosomal (EDL) son un grupo heterogéneo de más de 40 dolencias genéticas, debidas a la deficiencia de diversas enzimas encargadas de metabolizar sustancias dentrode los lisosomas. Estas macromoléculas se depositan dentro de las organelas de múltiples órganos y dan lugar a diversos signos y síntomas.Muchas de estas enfermedades tienen manifestaciones cutáneas, e incluso en algunas oportunidades es el dermatólogo quien sospecha el diagnóstico a partir de las lesiones en piel.En el presente trabajo se describen 8 pacientes con EDL, diagnosticados en nuestro servicio entre 2009 y 2010, en los cuales las lesiones en piel fueron la clave para arribar al diagnóstico.Cinco pacientes presentaban enfermedad de Fabry (un varón y 4 mujeres), uno mucopolisacaridosis 2 (sexo masculino), uno beta-manosidosis (sexo masculino) y el último galactosialidosis (sexo femenino).Los angioqueratomas fueron la manifestación cutánea más frecuente, y la clave diagnóstica en los pacientes con Fabry, el paciente con manosidosis y la paciente con galactosialidosis, mientras que la lesión en piel que llevó a sospechar mucopolisacaridosis 2 fueron manchas mongólicas aberrantes, algunas lenticulares, que comprometían el tronco.En cuatro pacientes el diagnóstico se confirmó por estudios enzimáticos en gota de sangre en papel de filtro, leucocitos y/u orina. En cinco pacientes (uno de los cuales ya había sido diagnosticado deforma bioquímica) se realizó estudio molecular. En todos los pacientes se hicieron los estudios complementarios necesarios para evaluar extensión del compromiso extracutáneo y necesidad de tratamientoespecífico (en aquellos pacientes en los cuales su enfermedad de base dispone de terapia de reemplazo enzimático). En uno de los pacientes con Fabry se inició terapia específica.El interés de nuestro trabajo radica en mostrar distintas EDL en las cuales el rol del dermatólogo fue fundamental para arribar al diagnóstico, resaltando..

Lysosomal-storage disorders are a group of more than 40 heterogeneous hereditary diseases dueto the deficiency of various lysosomal enzymes, in charge of the metabolization of macromolecules,with accumulation of the undigested substances inside those organelles througout severalorgans, deriving in the multiple symptoms and signs of these diseases.A great number of these diseases may have cutaneous lesions, and in many cases the dermatologistmay be the one to suggest the diagnosis.We describe eight patients with lisosomal storage diseases diagnosed at our hospital during 2009and 2010, on whom the cutaneous lesions were the clue to the diagnosis. Five patients were diagnosed as Fabry´s disease (1 male and 4 females), one as mucopolisaccharidosis2 (male), one as mannosidosis (male) and the last one as galactosyalidosis (female). Angiokeratomaswhere the most frequent cutaneous manifestation, and the key to the diagnosis inFabry’s, beta mannosidosis and galactosyalidosis, while aberrant and lenticular mongolian spotson the trunk led us to the diagnosis of mucopolissacharidosis 2.On four patients the diagnosis was confirmed by biochemical work-up. On five patients (one ofthem had already been confirmed with biochemistry) a genetic study was also performed.On all the patients studies where performed to evaluate the extension of the systemic disease andthe need of a specific treatment (for those diseases where it is available). One of the patients withFabry´s disease started the treatment soon after the diagnosis.We would like to emphasize the fundamental role of the dermatologist in diagnosing these diseases,stressing not only the academic importance of these rare diseases but also the possibility ofstarting in many of them specific enzyme replacement treatment.

Mucopolysaccharidoses type II: Enzymatic activity and quantitative and qualitative studies of urinary glycosaminoglycans in five patients

Five patients presenting Hunter's syndrome were biochemically studied. Quantification of urinary glycosaminoglycans (GAGs), electrophoretic characterizatio and correlation with ensymatic activity in leucocytes were carried out. In all cases, urinary GAGs/creatinine ratio was increased. Electrophoresis revealed the presence of heparan sulfate (HS) and dermatan sulfate (DS) in four cases (80 perecent), but in the remaining patient, only DS was present. In all patients, deficient enzymatic activity was demonstrated. These results show evidences of biochemical differences in thys syndrome