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Meconium ileus

Meconium Ileus - ncbi

  1. Simple meconium ileus is defined as the failure to pass meconium within 48 hours of birth without additional complications. 23Typical management includes an attempted contrast enema and if unsuccessful, celiotomy
  2. Meconium ileus refers to a blockage in the gastrointestinal tract caused by an extremely thick and sticky meconium (i.e. the very first stool of a newborn baby)
  3. Meconium ileus (pronounced meh-COE-nee-um ILL-ee-us) means that a baby's first stool (feces), called meconium, is blocking the last part of the baby's small intestine (ileum). This can happen when the meconium is thicker and stickier than normal

Meconium Ileus: What It Is, Causes, Diagnosis, Treatment

  1. Meconium ileus refers to a neonatal bowel obstruction of the distal ileum due to abnormally thick and impacted meconium. Unlike in the meconium plug syndrome, the meconium is abnormal in consistency
  2. al ileum by abnormally tenacious meconium; it most often occurs in neonates with cystic fibrosis. Meconium ileus accounts for up to 33% of neonatal small-bowel obstructions. Symptoms include emesis that may be bilious, abdo
  3. Meconium ileus may be complicated in up to 50% of patients by volvulus, intestinal perforation, meconium peritonitis (A), and ischemic necrosis of the bowel that results in stenosis or atresia. The classic radiographic findings are: Distended loops of bowel
  4. Meconium ileus is intestinal obstruction caused by thick, congealed meconium (baby's first stool), which does not get evacuated after the birth of a baby. Cystic fibrosis is an inherited disorder caused by a genetic mutation which causes thickening of the mucus and primarily affects the respiratory tract and pancreatic function
  5. Meconium ileus and cystic fibrosis. The meconium in newborns with cystic fibrosis (CF) is thicker and stickier than usual and this may block a part of the small intestine called the ileum. Thus, meconium ileus is a bowel obstruction in newborns. It is estimated that 80 to 90% of infants with meconium ileus have cystic fibrosis. 1,2
  6. Meconium ileus (or MI for short) happens when the meconium in your baby's bowel is thicker and stickier than usual. This causes the bowel to become blocked at birth. Meconium ileus is an extremely rare condition. It only affects 1 in 25,000 babies and accounts for up to 30% of newborn bowel obstructions
  7. Meconium ileus is blockage of the small intestine in a newborn caused by excessively thick intestinal contents (meconium), usually as a result of cystic fibrosis. Meconium ileus usually results from cystic fibrosis. Typically, newborns vomit, have an enlarged abdomen, and do not have a bowel movement during the first several days of life

Meconium ileus is often the first sign of cystic fibrosis. In cystic fibrosis, the meconium can form a bituminous black-green mechanical obstruction in a segment of the ileum. Beyond this, there may be a few separate grey-white globular pellets. Below this level, the bowel is a narrow and empty micro-colon Meconium ileus (MI) is the obstruction of the terminal ileum by highly viscid, tenacious meconium. MI is a complication of cystic fibrosis (CF). Fifteen percent of neonates with CF present with MI

Meconium ileus (MI) is often the first manifestation of cystic fibrosis (CF) and occurs in approximately 20% of patients diagnosed with CF. This article reviews the pathophysiology of MI and its clinical presentation Meconium ileus is a neonatal condition characterized by a distal mechanical small bowel obstruction from thick viscous meconium. Although mainly described in patients with cystic fibrosis (CF), meconium ileus has also been described independent of CF meconium ileus A condition characterised by obstruction of the neonatal intestine by meconium that may be confined to the ileus, a finding characteristic of cystic fibrosis

Meconium Ileus - Seattle Children'

  1. al ileum.It comes from the abnormal composition of the fetal meconium in cystic fibrosis. The most common cause of intestinal blockage without prior surgery in Caucasian children is DIOS
  2. Meconium ileus (MI) is congenital obstruction of the distal small bowel due to inspissated meconium within the ileum and sometimes the colon. It is most often a neonatal manifestation of cystic fibrosis (CF) and occurs in ten to twenty percent of newborns with that disorder
  3. Meconium ileus (MI) is often the first manifestation of cystic fibrosis (CF) and occurs in approximately 20% of patients diagnosed with CF. This article reviews the pathophysiology of MI and its clinical presentation. It focuses on the medical and surgical management emphasizing the importance of nu
Cystic Fibrosis - Pulmonary - Medbullets Step 2/3

Meconium ileus Radiology Reference Article Radiopaedia

ME CONIUM ILEUS is a specific disorder occurring in the neonatal period, usually a manifestation of cystic fibrosis of the pancreas. Intestinal obstruction is caused by inspissation of thick, ropy, tenacious meconium, which is firmly adherent to the mucosa (2) Meconium ileus accounts for about 30 percent of cases of intestinal obstruction in newborns.11 In approximately 50 percent of the newborns with meconium ileus, the gut is undamaged and continuity. Meconium ileus is seen only in a subset of patients with CF. Earlier studies have documented the prevalence of about 14% in Canada and Italy with the United States having up to 20%. Pathophysiology. In patients with meconium ileus, bowel lumen obstruction by thick, adhesive, and desiccated meconium is present Meconium ileus (MI) is one of the most common causes of intestinal obstruction in the newborn accounting for 9-33% of neonatal intestinal obstructions. It is the earliest clinical manifestation of cystic fibrosis (CF), occurring in approximately 16% of patients with CF. However, MI has been reported in the absence of CF Meconium, a dark green substance, is a newborn's first stool. Newborns expel meconium almost always in the first 24 hours of life. If the meconium is abnormally thick or tarlike, it can block the last part of the small intestine, called the ileum. This blockage is referred to as meconium ileus

60 Microcolon/Meconium Ileus | Radiology Key

Meconium Ileus - Pediatrics - Merck Manuals Professional

Meconium ileus is often the first sign of cystic fibrosis. [5] In cystic fibrosis, the meconium can form a bituminous black-green mechanical obstruction in a segment of the ileum. Beyond this there may be a few separate grey-white globular pellets. Below this level, the bowel is a narrow and empty micro-colon Meconium ileus (MI) is the obstruction of the terminal ileum by highly viscid, tenacious meconium. MI is a complication of cystic fibrosis (CF). Fifteen percent of neonates with CF present with MI. The combination of hyperviscous mucus secreted by the abnormal intestinal glands and pancreatic insufficiency leads to abnormal meconium and. Meconium Ileus. This condition, which accounts forabout 30% of cases of intestinal obstructionamong neonates, is characterizedby the inspissation of thick,tenacious meconium in the bowel.The most common cause is cystic fibrosis;approximately 6% to 20% of infantswith cystic fibrosis have meconiumileus. Hyperviscous mucus secretedby abnormal. Meconium ileus refers to bowel obstruction that occurs due to the presence of thicker then normal meconium. This condition is most often seen in patients with cystic fibrosis. Source

Meconium ileus, intestinal obstruction in the newborn, is caused in most cases by CFTR mutations modulated by yet-unidentified modifier genes. We now show that in two unrelated consanguineous Bedouin kindreds, an autosomal-recessive phenotype of meconium ileus that is not associated with cystic fibr A mother having meconium ileus may bring about an emergency C-section. Meconium ileus is generally a first indication of cystic fibrosis, although many cases do not have a known cause.There is also no link between the presence of meconium ileus and the severity of cystic fibrosis.The first signs of the condition include vomiting and bowel distention shortly after birth Meconium Ileus • Present in 20% of newborns with cystic fibrosis and may be the first clinical manifestation. • Abdominal distention at birth, multiple doughy loops of dilated bowel on palpation, bilious emesis, and failure to pass meconium in the first 24-48 hours of life. • Neuhauser's sign; 2 Types: complicated and uncomplicate Meconium Ileus. Lucy Liu 0 % Topic. Review Topic. 0. 0. Topic Snapshot: A neonate is born without any complications to a 24-year-old mother who received no prenatal care or screening. At 2 days of life, the male newborn becomes irritable and inconsolable. He is noted to have abdominal distension Meconium ileus is an obstruction in the small intestine caused by thick, congealed meconium. Meconium is the first stool passed by a newborn baby. Meconium is made up of material such as mucus, intestinal secretions, and amniotic fluid that the fetus ingests in the womb.. Meconium ileus may be of two forms

Below is a list of common medications used to treat or reduce the symptoms of meconium ileus. Follow the links to read common uses, side effects, dosage details and read user reviews for the drugs. Meconium Ileus• Meconium ileus is obstruction of the terminal ileum by abnormally tenacious meconium; it almost universally occurs in neonates with cystic fibrosis.• Meconium ileus accounts for up to 33% of neonatal small-bowel obstructions.• In the past, meconium ileus (MI) was considered to be closely related to cystic fibrosis (CF) Meconium Ileus. A 2-day-old boy is brought to the emergency department by his mother after he became inconsolable with abdominal distention and has not vomited or passed his first feces. He was born to a 27-year-old woman via spontaneous vaginal delivery without any perinatal complications

Meconium Ileus. Meconium ileus is the most common fetal intestinal disorder occurring in 10-15% of cases (1-3). It is the third most common cause of neonatal bowel obstruction after atresia and malrotation (1). This is because cystic fibrosis (CF) patients have meconium containing increased protein and decreased water making it thick and. Meconium ileus. General Considerations. Obstruction of the small bowel in the terminal ileus from impacted meconium; May develop in utero and manifests within 48 hours of birt

Meconium Ileus: Causes and Complication

From OMIM Meconium ileus refers to intestinal obstruction due to inspissated meconium in the distal ileum and cecum, which develops in utero and presents shortly after birth as a failure to pass meconium (summary by Romi et al., 2012). Meconium ileus is a known clinical manifestation of cystic fibrosis (CF; 219700), and meconium ileus in the. Meconium ileus is most often seen in the first few days of life in neonates with cystic fibrosis (Meconium ileus occurs in 15 % of patients with cystic fibrosis) and can rarely occur in infants with a normal pancreas. It accounts for about 20-30 % of cases of intestinal obstruction in newborns and it is due to thick meconium impacted in the. MECONIUM ileus is a form of intestinal obstruction in the newborn. It is also a clinical manifestation of cystic fibrosis. The obstruction is usually in the terminal ileum and is caused by inability to pass the characteristic thick, tenacious meconium. Until recently1 the condition carried a very.. Meconium ileus (MI) is a disorder of the neonate caused by the obstruction of the small intestines at the level of . ›. Inpatient placement and management of nasogastric and nasoenteric tubes in adults. View in Chinese

How Is Meconium Ileus (Infant Bowel Obstruction) Treated

Meconium ileus is often associated with cystic fibrosis and is often the first clinical presentation of the same. A neonate with meconium ileus presents with small bowel obstruction with abdominal distension, pain and inability to pass meconium. An X-ray picture of ground-glass appearance is characteristic The meconium of fetuses with cystic fibrosis and meconium ileus has increased viscosity and decreased water content compared with those of healthy controls. The developmental sequence of mucin. The diagnosis of meconium ileus was therefore believed confirmed, and laparotomy was performed on the same day. At surgery, the distal portion of the ileum was filled with hard, grayish-white, inspissated meconium appearing as multiple small nodules approximately 1 cm in diameter, rather than solid blocks Meconium ileus occurs in 15 percent of newborns with cystic fibrosis, and only 5 to 10 percent of patients with meconium ileus do not have cystic fibrosis.19, 20 The involved bowel is distended by.

Introduction Meconium ileus is among the most common causes of intestinal obstruction in the newborn, accounting for 9-33% of neonatal intestinal obstructions. It is the earliest clinical manifestation of cystic fibrosis (CF) and occurs in either a simple or a complicated form in approximately 16-20% of patients who have CF, though it also oc.. D. Sigmoid colon. E. Proximal duodenum. Answer Explanation. The correct answer is B. Meconium ileus usually is the result of inspissated meconium plugs in the mid-ileum. The three cardinal signs of intestinal obstruction are abdominal distention, bilious vomiting, and failure to pass meconium within 48 hours. --- Meconium ileus is a neonatal obstruction of the ileum by abnormally viscid, inspissated pellets of meconium. Etiology. Almost all cases are associated with an underlying diagnosis of cystic fibrosis (CF). Conversely, meconium ileus is the initial presentation of 10 to 15% of CF cases

Meconium ileus (MI) is defined as an obstruction caused by inspissated meconium at the level of the terminal ileum [1, 2].In the past, MI was considered to be closely associated with cystic fibrosis (CF).However, recent studies demonstrate that MI occurs frequently in the absence of CF as well [3, 4].Though the exact pathogenesis of MI in the absence of CF is not known, a spectrum of genetic. The present study compares the clinical presentation and diagnostic features of meconium ileus (MI) in newborns with and without cystic fibrosis (CF). A retrospective study of 43 patients treated in the Pediatric Surgical Center of Amsterdam was performed. Twenty-three of the patients (53.5%) were diagnosed as having CF MECONIUM ILEUS & DISTAL INTESTINAL OBSTRUCTION SYNDROME 1838 Rokitansky C von. Sections-Protokoll und Gutachen. Wien, 4. April 1838 (als Anhang). Karl Freiherr von Rokitansky (1804-1878) (figure 1) was a distinguished Viennese pathologist and described as a founder of modern pathological anatomy. He was one of the towering figures who mad

Medical definition of meconium ileus: congenital intestinal obstruction by thickened viscous meconium that is often associated with cystic fibrosis of newborn infants Meconium-like Ileus in Cystic Fibrosis List of authors. Li-Ying Lin, M.B., Ch.B., and Jia-Uei Wong, M.D. A 19-year-old woman with type 1 diabetes mellitus and suspected cystic fibrosis presented.

How Is Meconium Ileus An Early Symptom Of Cystic Fibrosis

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube Meconium ileus refers to intestinal obstruction due to inspissated meconium in the distal ileum and cecum, which develops in utero and presents shortly after birth as a failure to pass meconium (summary by Romi et al., 2012).Meconium ileus is a known clinical manifestation of cystic fibrosis (CF; 219700), and meconium ileus in the absence of CF is a rare phenomenon (summary by Tal et al., 1985)

Meconium Ileus What Is It And What Causes It? BellyBell

Meconium ileus in cystic fibrosis. 2016 2017 2018 2019 2020 2021 Billable/Specific Code Newborn/Neonate Dx (0 years). E84.11 is a billable/specific ICD-10-CM code. meconium ileus pronunciation with meanings, synonyms, antonyms, translations, sentences and more Which is the right way to pronounce the word irascible? i-ra-s-ci-bl Meconium obstruction of prematurity is an entity primarily affecting very low birthweight or extremely low birthweight babies causing low intestinal obstruction. Its presence may at best delay establishment of enteral feeding and compromise nutrition and at worst lead to mechanical obstruction requiring surgery or to intestinal perforation. There are considerable challenges in the recognition. congenital stricture or stenosis of intestine (Q41-Q42); cystic fibrosis with meconium ileus (E84.11); ischemic stricture of intestine (K55.1); meconium ileus NOS (P76.0); neonatal intestinal obstructions classifiable to P76.-; obstruction of duodenum (K31.5); postprocedural intestinal obstruction (K91.3-); stenosis of anus or rectum (K62.4 Meconium aspiration syndrome (MAS) also known as neonatal aspiration of meconium is a medical condition affecting newborn infants. It describes the spectrum of disorders and pathophysiology of newborns born in meconium-stained amniotic fluid (MSAF) and have meconium within their lungs. Therefore, MAS has a wide range of severity depending on what conditions and complications develop after.

Meconium Ileus - Children's Health Issues - Merck Manuals

Pediatr Surg Int. 2006; 22 (3):236-9 (ISSN: 0179-0358) Serum immunoreactive trypsin (IRT) is used as a screening test for cystic fibrosis (CF) in neonates in many countries. Variations in IRT levels are observed in healthy and cystic neonates within the first few weeks of life. Fifteen percentage of CF neonates present with meconium ileus (MI) Meconium is the sticky, tar-like material that newborns pass as their first bowel movement. Healthy babies pass meconium within their first day of life. Babies with meconium ileus have meconium that is even stickier and thicker than usual. This can cause bowel blockage Meconium found in the intestine of a newborn, consisting of succus entericus (bile salts, bile acids, and debris from the intestinal mucosa) Meconium is normally evacuated within 6 hours of birth or earlier. Meconium ileus occurs with meconium becomes inspissated and obstructs the distal ileum. It is usually a manifestation of cystic fibrosis MECONIUM ILEUS AND ITSCOMPLICATIONS* AREAPPRAISAL OFPLAIN FILM ROENTGEN DIAGNOSTIC CRITERIA ByJOHNC.LEONIDAS, M.l).,t WALTER F.BERI)OX, M.i)., DAVID H.BAKER, M.D.,t andTHOMAS V.SANTULLI, M.D.I NEWYORK, NEW YORK B ETWEEN io and 20percentofpa-tients with cystic fibrosis present at birth with meconium ileus, aform ofsmall intestinal obstruction by. In complicated meconium ileus, the greatest plain film roentgen problem was the inability to suspect complications (such as volvulus) unless calcifications or a mass effect of the volvulus could be seen. 5. The wide, often bizarre spectrum of roentgen findings in meconium ileus reflects the varying prenatal intestinal catastrophes secondary.

Meconium Ileus - Pediatrics - MSD Manual Professional Editio

Meconium is a thick, green, tar-like substance that lines your baby's intestines during pregnancy. Typically this substance is not released in your baby's bowel movements until after birth. However, sometimes a baby will have a bowel movement prior to birth, excreting the meconium into the amniotic fluid A condition characterized by intestinal obstruction due to inspissated meconium in the distal ileum and cecum, which develops in utero and presents shortly after birth as a failure to pass meconium. Meconium ileus is a known clinical manifestation of cystic fibrosis Meconium ileus: Obstruction of the intestine ( ileus) due to overly thick meconium. Meconium ileus results from a deficiency of trypsin and other digestive enzymes from the pancreas, as in cystic fibrosis Meconium ileus is one of the manifestations of fibrocystic disease of the pancreas. Intestinal obstruction in an infant is always a serious problem. When the obstruction is due to meconium ileus, the problem is doubly serious, because successful surgical relief of the obstruction may be followed by.. ICM II - Meconium Ileus study guide by wattsj32 includes 17 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades

Meconium - Wikipedi

Abstract. Meconium ileus (MI) is neonatal intestinal obstruction caused by protein-rich, inspissated meconium in the terminal ileum. This viscid meconium adheres to the bowel wall, causing an intra-luminal obstruction (sometimes referred to as obturator-type obstruction) Meconium ileus is the presenting feature in 10-15% of patients with cystic fibrosis. Meconium ileus is generally classified as simple or complicated, with complications occurring in up to 50% of cases. Complications include ileal atresia or stenosis, volvulus, and, if perforation occurs, meconium peritonitis

Meconium ileus (MI) is the earliest disease complication in cystic fibrosis (CF), a multiorgan disease that is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR. 1. Download the Pediatric Surgery Library app by Unbound Medicine. 2. Select Try/Buy and follow instructions to begin your free 30-day trial. You can cancel anytime within the 30-day trial, or continue using Pediatric Surgery Library to begin a 1-year subscription ($39.95) Grapherence® [↑1] Meconium Ileus Procedures. Assessment Meconium ileus, intestinal obstruction in the newborn, is caused in most cases by CFTR mutations modulated by yet-unidentified modifier genes. We now show that in two unrelated consanguineous Bedouin kindreds, an autosomal-recessive phenotype of meconium ileus that is not associated with cystic fibrosis (CF) is caused by different homozygous. with meconium ileus, the average age to diagnosis of CF-based on symptoms was 14 months Diagnosis of CF Prior to the Introduction of NBS Side note: Newborns with meconium ileus occasionally have false negative NBS by IRT (low IRT). Always test for CF in babies with meconium ileus

Meconium ileus - an overview ScienceDirect Topic

Meconium Ileus in a Neonate with Cystic Fibrosis List of authors. Kelly E. Wood, M.D. In a newborn infant with a prenatal diagnosis of cystic fibrosis, abdominal distention and emesis developed at. The present study was designed to compare the clinical course of children diagnosed with cystic fibrosis (CF) in infancy due to the presence of meconium ileus (MI) with children diagnosed by way of a newborn screening programme (non-MI). A matched case-control study design was used. Matching was performed on the basis of sex and date of birth Meconium plugs in neonates with meconium ileus and functional immaturity of the colon. (A) Image during contrast enema shows innumerable meconium filling defects (arrowheads) in an extreme microcolon and the terminal ileum, with dilated air-filled bowel proximally, in meconium ileus. (B) image during contrast enema shows meconium filling defect (arrowhead) in a small left colon (arrows) in. meconium. (. meconium ileus. ) is often the first clinical sign of cystic. fibrosis. . Later, the lungs, digestive system, and sweat glands are commonly affected. Bronchial accumulation of hyperviscous mucus and impaired ciliary clearance predispose affected individuals to chronic respiratory infection, pulmonary

Meconium

Meconium ileus in Cystic Fibrosis - Journal of Cystic Fibrosi

Simple Meconium Ileus. In the goal of operation is the relief of intraluminal ileocolonic obstr by either the evacuation of the adherent intraluminal meconium or by resection of the portion of bowel filled with inspissated material. f1. Enterotomies with irrigation coupled with a limited resection 2. The Miculicz resection and enterestomy 3 Meconium Ileus. Meconium ileus (MI) is one of the most common causes of intestinal obstruction in the newborn, accounting for 9-33% of neonatal intestinal obstructions. 2 It is characterized by extremely viscid, protein-rich, inspissated meconium causing an intraluminal obstruction in the distal ileum, usually at the ileocecal valve. It is often the earliest clinical manifestation of cystic. Meconium ileus complications. ileal atresia or stenosis; ileal perforation resulting in meconium peritonitis; volvulus with or without pseudocyst formation; Ileus vs Obstruction. Intestinal obstruction can be a partial or complete blockage of the bowel. An obstruction of the intestine is a blockage that completely stops or seriously impairs the. Features of meconium ileus in CF pigs closely replicate those observed in humans with CF, including obstruction by meconium in the distal small intestine, atretic intestinal segments, and microcolon (14 - 16). The meconium ileus in CF pigs would be lethal if not corrected soon after birth Define meconium ileus. meconium ileus synonyms, meconium ileus pronunciation, meconium ileus translation, English dictionary definition of meconium ileus. n. A dark green fecal material that accumulates in the fetal intestines and is discharged at or near the time of birth. American Heritage® Dictionary of the..

Meconium Ileus, Meconium Plug Syndrome, and Distal

* Meconium ileus: Even though there is a history of abdominal distention and spitting with feedings, Aaron has had nonbilious vomiting and 3 small meconium stools since delivery. Neonate with gastrointestinal issue Meconium ileus is a manifestation of intestinal and pancreatic dysfunction that results in the accumulation of a sticky and inspissated intraluminal meconium, which in most cases results from the autosomal recessive disease cystic fibrosis. Both nonoperative and operative therapies are effective in relieving this small-bowel obstruction; in the. Gastrografin is a radiopaque contrast agent for the gastrointestinal tract (GIT) which can be applied orally or rectally. In neonatal intensive care, Gastrografin is used to detect otherwise radiologically invisible perforations or an insufficient GIT anastomosis after surgery. Furthermore it is used for the treatment of meconium ileus Meconium ileus The problem. Fifteen percent of children with CF have neonatal intestinal obstruction due to inspissated meconium requiring urgent treatment. In the majority the diagnosis is made with a contrast enema (which shows a microcolon and meconium pellets in the ascending colon and terminal ileum). In 30 or 40% of infants the. Meconium ileus in the absence of cystic fibrosis is considered a rare event and has been reported in only a few cases,16-18 some-times as a familial condition.10 11 However, 21P6% of our patients with meconium ileus did not have cystic fibrosis. Although the exact cause ofmeconiumileus is unclear, fou

Meconium peritonitis | Image | RadiopaediaParalytic IleusRespiratory Distress in neonates -2- meconium aspiration

614665 - MECONIUM ILEUS - Failure to pass meconium after birth [UMLS: C3553393] - Inspissated meconium in distal ileum [UMLS: C3553394] - Microcolon on contrast enema [UMLS: C3553395 HPO: HP:0004388] [HPO: HP:0004388 UMLS: C0266200, C3553395] - Prolonged diarrhea in infancy (in some patients Meconium ileus is defined as a small bowel obstruction due to inspissated meconium within the terminal ileum 7, 8. MI typically occurs in the neonatal period, however there have been rare reports of MI presenting up to 6 months of age 9. While essentially synonymous with CF,. X-ray investigation of meconium ileus. X-ray shows: distended loops of intestine with thickened bowel walls; a large amount of meconium mixed with swallowed air produces the so-called 'ground-glass' sign typical of meconium ileus, a characteristic feature but often absent; calcification, free air or very large air-fluid levels suggest bowel.