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      Síndrome de megavejiga-microcolon-hipoperistalsis intestinal: a propósito de un caso de supervivencia prolongada Translated title: The megacystis-microcolon-intestinal hypoperistalsis syndrome: a propos of a case with prolonged survival

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          Abstract

          El síndrome de megavejiga-microcolon-hipoperistaltismo intestinal (MMIHS) es una grave enfermedad congénita autosómica recesiva, caracterizada por distensión vesical e hipoperistaltismo intestinal que provoca obstrucción intestinal funcional en el neonato, además de otras alteraciones. Presenta una incidencia muy baja, en torno al centenar de casos se describen en la bibliografía; la esperanza de vida apenas supera el año falleciendo generalmente por procesos sépticos. El caso que se presenta triplica esta supervivencia, con una calidad de vida y desarrollo ponderal muy aceptables. La nutrición parenteral domiciliaria unida a un seguimiento y coordinación multidisciplinar muy estrictos, constituyen las claves del éxito en esta patología.

          Translated abstract

          Megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS) is a severe congenital disease with autosomal recessive inheritance, characterized by vesical distension and intestinal hypoperistalsis what causes intestinal obstruction in newborn, with other abnormalities associated. It presents a low incidence, about a hundred cases are reported in the bibliography. Life expectancy doesn't reach a year because of the sepsis failure generally. In our study the survival is higher than the majority of the cases reported, with good cuality of life and acceptable ponderal development. Home parenteral nutrition with the following and multidisciplinary collaboration in a strict way, establish the success' key in this pathology.

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          Most cited references 19

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          Megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS), an autosomal recessive disorder: clinical reports and review of the literature.

          We present 2 new patients with the megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS), review the literature, and discuss the prenatal diagnosis and treatment. MMIHS, as reported in 43 cases, is usually lethal. Most children die during the first year of life, and only 3 children survived their first year. We report the 6th pair of sibs with the disease. Overall, 17 patients reported have had sibs with MMIHS or the parents were consanguineous; 4 times the parents were first, cousins, confirming that this is an autosomal recessive disorder. The present 2 children, whose parents also were first cousins, were of different sex. They had typical MMIHS with abdominal distension due to pronounced megacystis, hydronephrosis, microcolon, and microileum, involving the distal part of the ileum, malrotation of the gut, and intestinal hypoperistalsis. Neither surgery nor medical treatment was successful and the children died at the age of 19 days and 2 1/2 months, respectively. There is no cure for the disease. However, a new protkinetic drug, Cisapride might be worth trying in these cases. Prenatal ultrasound diagnosis of MMIHS might be possible.
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            Megacystis microcolon intestinal hypoperistalsis syndrome: evidence of a primary myocellular defect of contractile fiber synthesis.

            Two infant boys with megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS) are reported. Presenting with neonatal intestinal obstruction, they underwent laparotomies that showed megacystis, microcolon, and aperistaltic shortened small bowel without any mechanical obstruction. Patient 1 gradually improved and is developing normally at home, on a normal diet without genitourinary or gastrointestinal complaints (now 11 years old). Patient 2, who underwent vesicoamniotic drainage antenatally, never developed adequate gastrointestinal or genitourinary function in spite of appropriate diversion and pharmacologic support. He showed progressive deterioration and died at the age of 7 months. Detailed histo-immuno- and ultrastructural pathology assessment, although confirming results in the existing literature in some aspects, showed previously unreported neuronal dysplastic changes associated with increased laminin and fibronectin. Although patient 1 showed ultrastructural features of vacuolar degeneration of smooth muscle as reported in the literature, patient 2 showed ultrastructural and histochemical evidence of excessive smooth muscle cell glycogen storage with severely reduced contractile fibres displaced to the extreme periphery of the cells, suggesting a fundamental defect of glycogen-energy utilization. A deficiency of fiber synthesis as the alternative primary defect is discussed. In both cases, a two-step genetic defect may explain the variability in clinical outcome and pathological findings.
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              Megacystis microcolon intestinal hypoperistalsis syndrome: late sequelae and possible pathogenesis.

              Megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS) is characterized by hypoperistalsis in the presence of ganglion cells, malrotation, microcolon, bladder distension, and female predilection. We draw attention to the long-term management of a patient with MMIHS and propose a pathogenetic mechanism to account for this syndrome. We propose that the initial event in the pathogenesis of MMIHS is an intramural inflammatory process that affects the gastrointestinal and urinary tracts. This leads to extensive fibrosis which destroys the intestinal neural network, producing hypoperistalsis. The same process causes neuromuscular incoordination in the bladder wall, resulting in irregular bladder contractions against a "closed sphincter" leading to bladder distension. The enlarged bladder then interferes with the rotation of the intestine causing malrotation.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                nh
                Nutrición Hospitalaria
                Nutr. Hosp.
                Grupo Arán (Madrid, Madrid, Spain )
                0212-1611
                1699-5198
                October 2008
                : 23
                : 5
                : 513-515
                Affiliations
                Oviedo orgnameHospital Universitario Central de Asturias orgdiv1Servicio de Farmacia España
                Oviedo orgnameHospital Universitario Central de Asturias orgdiv1Servicio de Pediatría España
                Article
                S0212-16112008000700015

                This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 12, Pages: 3
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