Homozygous deletion in MYL9 expands the molecular basis of megacystis-microcolon-intestinal hypoperistalsis syndrome.

Megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS) is a severe disease characterized by functional obstruction in the urinary and gastrointestinal tract. The molecular basis of this condition started to be defined recently, and the genes related to the syndrome (ACTG2-heterozygous variant in sporadic cases; and MYH11 (myosin heavy chain 11), LMOD1 (leiomodin 1) and MYLK (myosin light chain (MLC) kinase)-autosomal recessive inheritance), encode proteins involved in the smooth muscle contraction, supporting a myopathic basis for the disease. In the present article, we described a family with two affected siblings with MMIHS born to consanguineous parents and the molecular investigation performed to define the genetic etiology. Previous whole exome sequencing of the affected child and parents did not identify a candidate gene for the disease in this family, but now we present a reanalysis of the data that led to the identification of a homozygous deletion encompassing the last exon of MYL9 (myosin regulatory light chain 9) in the affected individual. MYL9 gene encodes a regulatory myosin MLC and the phosphorylation of this protein is a crucial step in the contraction process of smooth muscle cell. Despite the absence of human or animal phenotype related to MYL9, a cause-effect relationship between MYL9 and the MMIHS seems biologically plausible. The present study reveals a strong candidate gene for autosomal recessive forms of MMIHS, expanding the molecular basis of this disease and reinforces the myopathic basis of this condition.

Síndrome de Ogilvie (pseudo-obstrução intestinal aguda) - Relato de caso / Ogilvie's Syndrome (Acute pseudo-intestinal obstruction) - A case report

RACIONAL: A síndrome de Ogilvie é condição clínica com sinais, sintomas e aparência radiológica de dilatação acentuada do cólon sem causa mecânica e pode complicar com rompimento da parede do cólon e sepse abdominal. O tratamento na maioria das vezes é cirúrgico. RELATO DO CASO: Paciente feminina, 49 anos, internada com queixa de dor abdominal e diarréia e apresentando-se confusa, desidratada, taquicárdica, dispnéica, temperatura de 38ºC, abdômen distendido, ausência de ruídos hidro-aéreos e toque retal com fezes pastosas. Estudo radiográfico mostrou padrão de pseudo-obstrução intestinal. A paciente evoluiu com parada de eliminação de gases e fezes e sinais de abdômen agudo infeccioso. Foi submetida à laparotomia com achado de ceco e transverso bastante dilatados e sem sinal de obstrução mecânica. Realizada colectomia subtotal com fechamento do coto distal e ileostomia terminal. CONCLUSÃO: Pensar nessa possibilidade diagnóstica e agir mais rapidamente é a única possibilidade de diminuir a morbimortalidade desses pacientes.

BACKGROUND: The Ogilvie's Syndrome is a clinical condition with signals, symptoms and radiological appearance of large bowel swell without mechanical cause. This obstruction can complicate with disruption of the bowel and consequent evolution of abdominal sepse. The treatment is typically surgical. AIM: The aim of this work is report a case of Ogilvie's Syndrome. CASE REPORT: Feminine patient, 49 years-old, interned with a history of abdominal pain and diarrhea and presenting dehydratation, tachycardia , dyspnea, mental confusion, 38ºC of temperature, distended abdomen, absence of hydro-aerial noises and rectal touch with pasty excrements. The x-ray showed a standard of pseudo-intestinal obstruction. The patient evolved with stop of elimination of farts and excrements and signals of infectious acute abdomen. The laparotomy showed cecum and transverse very swelled without signal of mechanical obstruction. The treatment was a subtotal colectomy with closing of the rectal stump and terminal ileostomy. CONCLUSION: This is rare syndrome and cases like this must be described for a faster diagnostic and adequate treatment, reducing the morbimortality of these patients.

Neuronal intestinal dysplasia: a role for surgery?

Neuronal intestinal dysplasia (NID) is a poorly understood colonic motility disorder with characteristic histopathological findings and clinical presentation. It is often associated with Hirschsprung's disease (HD) and can constitute a cause of failure of clinical improvement after adequate resectional pull-through surgery. Other conditions associated with NID are: Chronic Intestinal Pseudo-obstruction (CIPO), anorectal malformations and Multiple Endocrine Neoplasia (MEN) II syndrome patients. To increase the diagnostic yield of NID the pathologist should be aware and use histochemistry evaluation of the rectal biopsy specimen in patients with history of constipation or unexplained bouts of diarrhea. Adequate sampling of the temporary proximal colostomy done to HD patients should be examined for NID pathological changes. Treatment has centered around the clinical picture with most cases managed medically with prokinetic agents, colonic irrigations, and bowel cathartics until improvement and normalization of histology occur. There is evidence of progressive maturation of the enteric nervous system with time. Surgery is indicated for patients with severe clinical deterioration after failed medical management

Neuronal intestinal dysplasia: a role for surgery?

Neuronal intestinal dysplasia (NID) is a poorly understood colonic motility disorder with characteristic histopathological findings and clinical presentation. It is often associated with Hirschsprung's disease (HD) and can constitute a cause of failure of clinical improvement after adequate resectional pull-through surgery. Other conditions associated with NID are: Chronic Intestinal Pseudo-obstruction (CIPO), anorectal malformations and Multiple Endocrine Neoplasia (MEN) II syndrome patients. To increase the diagnostic yield of NID the pathologist should be aware and use histochemistry evaluation of the rectal biopsy specimen in patients with history of constipation or unexplained bouts of diarrhea. Adequate sampling of the temporary proximal colostomy done to HD patients should be examined for NID pathological changes. Treatment has centered around the clinical picture with most cases managed medically with prokinetic agents, colonic irrigations, and bowel cathartics until improvement and normalization of histology occur. There is evidence of progressive maturation of the enteric nervous system with time. Surgery is indicated for patients with severe clinical deterioration after failed medical management.

Small bowel motility disorders.

Small bowel motility disorders may result in prolonged or accelerated transit and present clinically with such symptoms as nausea, vomiting, bloating, pain or altered bowel movements. These disorders result from derangements of neuromuscular control affecting extrinsic nerves, enteric plexuses or smooth muscle, or from structural disorders that may be congenital or acquired. Diagnosis depends on exclusion of mechanical obstruction or structural disease and assessment of motor function by measurement of transit and intestinal pressure profiles, and a search for the underlying disorder causing a neuropathy or myopathy. Management of stasis syndromes is based on restoration of good nutrition, treatment of bacterial overgrowth, prokinetic agents, antiemetics and surgery for localized disease. Patients with fast transit disorders require opioid agonists and, rarely, second-line treatments such as verapamil, clonidine or octreotide.

[Chronic idiopathic intestinal pseudo-obstruction: visceral myopathy. Report of 4 cases]. / Pseudoobstrucción intestinal crónica idiopática: miopatía visceral. Presentación de 4 casos.

Chronic intestinal pseudo-obstruction is the term applied to a heterogeneous group of functional motility disorders sharing a common clinical expression: signs and symptoms of bowel obstruction in absence of mechanical occlusion. It is caused by ineffective intestinal propulsion. The chronic form of intestinal pseudo-obstruction may be primary or secondary. Primary pseudo-obstruction or chronic idiopathic pseudo-obstruction (CIIP) defines a group of propulsive disorders having no recognized underlying diseases. This study presents four female patients, aged between 4 months to 7 years, and makes a review of the literature. The symptoms, very similar in three of them, were bilious vomiting, abdominal distention and constipation, alternating with diarrhea and malnutrition. The fourth patient, different from the others in the age of onset and evolution, only had severe constipation and abdominal bloating. The diagnostic was made by full thickness biopsies during laparotomy, getting specimens by mapping, at different heights of intestine and stomach. Samples were studied by optic and electronic microscopy and visceral myopathies were found. None of them had urinary disorders. Medical treatment consisted of total parental nutrition and/or enteral nutrition. Cisapride was not effective in the two patients who received it.

Pseudoobstrucción intestinal crónica idiopática: miopatía visceral: presentación de 4 casos / Chronic idiopathic intestinal pseudo-obstruction: visceral myopathy: report of 4 cases

La pseudo-obstrucción crónica comprende un grupo heterogéneo de desórdenes de la motilidad intestinal, que tienen una expresión clínica común: signos y síntomas de obstrucción intestinal, en ausencia de una oclusión mecánica. La causa es una falla de la propulsión intestinal. La forma crónica de pseudo-obstrución intestinal puede ser primaria o secundaria. La primaria, o pseudo-oclusión intestinal crónica idiopática (CIP de la tierra anglosajona), define a un grupo de desórdenes propulsivos, sin una enfermedad subyacente. En esta comunicación se presentan 4 pacientes con esta patología, de sexo femenino y edades comprendidas entre 4 meses y 7 años, y se realiza una revisión de la bibliografía. Los sintomas, muy similares en 3 de ellos fueron vómitos biliosos, distensión abdominal y constipación, alternando con diarrea y desnutrición grave. La 4ª paciente, diferente de las otras en edad de comienzo y evolución, presentó solo constipación importante y distensión abdominal. El diagnóstico se realizó con biopsias transmurales por mapeo en laparotomía exploratoria, a diferentes alturas del intestino y estómago. Se estudió por microscopía visceral. Ninguna presentó patología urinaria. El tratamiento médico consistió en alimentación parenteral y/o enteral. El cisapride no fué efectivo en los dos casos que se usó

Pseudoobstrucción intestinal crónica idiopática: miopatía visceral: presentación de 4 casos / Chronic idiopathic intestinal pseudo-obstruction: visceral myopathy: report of 4 cases

La pseudo-obstrucción crónica comprende un grupo heterogéneo de desórdenes de la motilidad intestinal, que tienen una expresión clínica común: signos y síntomas de obstrucción intestinal, en ausencia de una oclusión mecánica. La causa es una falla de la propulsión intestinal. La forma crónica de pseudo-obstrución intestinal puede ser primaria o secundaria. La primaria, o pseudo-oclusión intestinal crónica idiopática (CIP de la tierra anglosajona), define a un grupo de desórdenes propulsivos, sin una enfermedad subyacente. En esta comunicación se presentan 4 pacientes con esta patología, de sexo femenino y edades comprendidas entre 4 meses y 7 años, y se realiza una revisión de la bibliografía. Los sintomas, muy similares en 3 de ellos fueron vómitos biliosos, distensión abdominal y constipación, alternando con diarrea y desnutrición grave. La 4¬ paciente, diferente de las otras en edad de comienzo y evolución, presentó solo constipación importante y distensión abdominal. El diagnóstico se realizó con biopsias transmurales por mapeo en laparotomía exploratoria, a diferentes alturas del intestino y estómago. Se estudió por microscopía visceral. Ninguna presentó patología urinaria. El tratamiento médico consistió en alimentación parenteral y/o enteral. El cisapride no fué efectivo en los dos casos que se usó (AU)

Antroduodenal motility in children with chronic intestinal pseudo-obstruction.

Chronic intestinal pseudo-obstruction describes a heterogeneous group of disorders characterized by signs and symptoms of intestinal obstruction in the absence of a mechanical lesion. We studied antroduodenal motility in 13 children with pseudo-obstruction. The diagnosis was based on radiographic evidence in all, surgery in 11, and specific pathologic features in four. Antroduodenal motility was abnormal in all 13. Qualitative abnormalities in the patterns of antroduodenal contractions permitted separation into groups: (1) postprandial hypomotility (n = 3), (2) absent migrating motor complexes, with phase 3-like activity at the start of meals (neuropathic variety) (n = 5) (3) very low amplitude or absent contractions (myopathic variety) (n = 2); the remaining patients (n = 3) had other distinctive abnormalities. Cisapride, a new gastrointestinal prokinetic drug, stimulated proximal duodenal contractions in the 30 minutes after a meal in nine of 10 patients tested. These studies indicate that antroduodenal manometry is useful for characterizing intestinal pseudo-obstruction, and cisapride stimulates postprandial duodenal contractions in patients with pseudo-obstruction.