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Pyloric stenosis | Radiology Reference Article - Radiopaedia. org Pyloric stenosis is the result of both hyperplasia and hypertrophy of the pyloric circular muscle fibers The pathogenesis of this is not understood There are four main theories 9: immunohistochemical abnormalities genetic abnormalities infectious cause hyperacidity theory Radiographic features Plain radiograph
Pyloric stenosis | Radiology Case - Radiopaedia. org Pyloric stenosis affects males 4-5 times more often than females It occurs between 4-8 weeks of life, and presents with non-bilious projectile vomiting There may be a positive family history Ultrasound findings include: target sign: hypertrophied hypoechoic muscle surrounding echogenic mucosa
Hypertrophic pyloric stenosis | Radiology Case - Radiopaedia. org Hypertrophic pyloric stenosis: The patient's clinical presentation is a common one in pediatrics with a wide differential diagnosis In this case, the sonographic findings of a hypertrophic pylorus with no passage of gastric contents clinches the diagnosis of hypertrophic pyloric stenosis (HPS)
Hypertrophic adult pyloric stenosis - Radiopaedia. org Hypertrophic adult pyloric stenosis (HAPS) is quite rare with very few cases having been documented The normal adult pyloric muscular wall thickness ranges from 3 to 8 mm¹ In this presentation, the muscular layer amounts up to a mean of 15 mm
Pyloric stenosis | Radiology Case - Radiopaedia. org Case findings are consistent with pyloric stenosis If possible, reporting radiologists should review the patient in real-time with the sonographer to confirm the dynamic findings of hyperperistalsis of the stomach and non-opening of the pylorus
Congenital hypertrophic pyloric stenosis - Radiopaedia. org Congenital hypertrophic pyloric stenosis is more common in boys and manifested at 3-8 weeks of life Its diagnosis can easily be made by ultrasonography and depends on visualization of thickened pyloric muscle layer (> 3 mm) and elongated pyloric canal (> 15 mm)
Pyloric stenosis | Radiology Case - Radiopaedia. org Hypertrophic pyloric stenosis is idiopathic thickening of muscular layer of the pyloric canal with failure of relaxation of the pylorus Presentation is at 4-6th week of life, with projectile, non bilious vomiting and voracious appetite
Hypertrophic pyloric stenosis (ultrasound . . . - Radiopaedia. org Hypertrophic pyloric stenosis can be characterized on ultrasound by the measurements of the hypertrophic muscle Although the criteria can vary from publication to publication, an easy way to keep in mind the values is using a mnemonic which relies upon remembering the first digits of the number "pi", also represented by the Greek letter "π":
Pyloric stenosis | Radiology Case - Radiopaedia. org Ultrasound of the pylorus demonstrates 4mm thick pyloric muscle and increased length of the pyloric canal to 20mm The thickened muscle forms a prominent hypoechoic target sign on transverse (sagittal with respect to the trunk) imaging
Hypertrophic pyloric stenosis | Radiology Case - Radiopaedia. org Ultrasonography with the high-frequency linear transducer is the modality of choice for detection of Hypertrophic pyloric stenosis (HPS) It allows direct observation of the pyloric canal, usually located slightly medial and posterior to the gallbladder