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Anatomía de colon.
Marlon Mizael García Hernández medico residente IDyT.Hospital regional de alta especialidad del bajío.
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Nam, Suk, Tae, Complications of Congenital and Developmental Abnormalities of the GastrointestinalTract in Adolescents and Adults: Evaluation with Multimodality Imaging radiographics 2010.
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colon
• Las haustras son son saculaciones mas o menos prominetes. Que se forman en los espacios comprendidos entre las taeniae. • Separadas entre si por pliegues circulares constrictivos de longuitudes
variabeles. Su grado de prominencia depende de la contracción de las taeniae.
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• Mucosa • Submucosa • Muscular serosa y subserosa.
• Tres taenia• Las hasutaras.• Apendices epiploicae.
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Calibres normales.
• Inestino delgado hasta 3cm.• Colon transverso hasta 6cm.• Ciego hasta 9cm. (5 a 7cm).
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• 15 a 20cm.
Butler P, Mitchell A, Healy JC. Applied Radiological Anatomy. (2012)
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colon
• Los apéndices epiploicae constan de bolsas subserosas llenas de grasa en forma de uvas y de tamaño variable en función del estado nutricional del paciente.• Tipicamente miden 1.5 x 3.5cm.• Solo emergen del intestino grueso.
Ghahremani GG, White EM, Hoff FL et-al. Appendices epiploicae of the colon: radiologic and pathologic features. Radiographics. 1992;12 (1): 59-77
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Colon transverso.
• Mide: 30 a 60cm.• Intraperitoneal.• Se une a la pared abdominal posterior a través del mesocolon transverso
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Rashid A, Nazir S, Hakim SY et-al. Epiploic appendagitis of caecum: a diagnostic dilemma. Ger Med Sci. 2013;10: Doc14
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COLON SIGMOIDES.
• Transición de colon descendente a colon sigmoides no esta bien definida.• Forma de omega a nivel de la 1 y 2 vertebra sacras.• Se une al recto en angulo agudo a nivel de la 3 vertebra sacra.• 40cm en adultos y 18cm en niños. Hasta 84cm de longitud.
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Recto y canal anal.
• Union rectosigmoidea a nivel de la tercera vertebra sacra.• Mide 10 a 15 cm.• La pared posterior unida a la cara anterior del sacro.• El recto en las mujeres es mucho mas pequeño.• 3 válvulas rectales.
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• Espacio presacro:
• Niños 1 a 5mm.• Adultos 2 a 16mm.• Anscianos mas de 20mm.
Kishore V, Anuradba sural, Measurements in radiology made easy 2011.
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Recto y canal anal.
• En posición debido al suelo pélvico:
• Musculo pubococcigeo.• Musculo puborectal.• Musculo ileococcigeo.
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Akhtar MA, Arora PK. Case of unusual foreign body in the rectum. Saudi J Gastroenterol. 2009;15 (2): 131-2
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Irrigación.
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Mesentérica inferior
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Apéndice vermiforme.
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Drenaje venoso
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Drenaje linfático.
• Ganglios pericolicos.
• Ganglios linfáticos ileocolico, colico derecho, colico medio, colic izquierdo.
• La parte inferior del canal anal drena hacia los ganglios inguinales superiores.
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Inervacion.
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CTC
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Horton KM, Corl FM, Fishman EK. CT evaluation of the colon: inflammatory disease. Radiographics. 20 (2): 399-418
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Avunduk C. Manual of Gastroenterology, Diagnosis and Therapy. Lippincott Williams & Wilkins. (2008) ISBN:0781769744.
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