Pyloric stenosis (PS) is "multifactorial" - there are many different factors that increase a baby's risk of developing it. These include heredity, gender, position in the birth order, race, blood group, maternal stress, breast feeding, various bio-chemical issues, the intake of a common antibiotic, etc.
Quite a list, but these are not the causes, which are still not well understood despite PS having been recognised and treated for more than a century!
Heredity is one of the most obvious and easily noted risk factors: twins from a single egg usually both have PS, unidentical twins rarely. Females are 4-6 times less likely to have PS, but when they've had it, it's stronger in their genes, so that the child of a mother who had PS will have an up to 20% chance of passing it on, whilst a father with a PS history brings a 5% risk of his child having it.
The incidence is quite variable: different studies have shown that in developed Western countries PS sometimes occurs in less than one baby in 1000, ranging to nearly 9 in every 1000. However often it occurs, it's fairly common and all of us know people who have had it. Babies at the greatest risk of PS are firstborn Jewish or Caucasian males with blood types B or O, and whose mother had it. The risk is increased slightly if the baby was born full term, belongs to a higher socio-economic group, or had a younger mother or one who was stressed during the last months of her pregnancy. Breastfeeding has been linked both positively and negatively, as have several other factors. The antibiotic erythromycin has been found to increase the danger of PS.
These notes indicate that PS incidence and genetic factors are easier to list than the actual causes, although the biochemistry of the development of the gut is worth studying for those who have enough background to understand the science.
The Wikipedia page on pyloric stenosis has a lot of useful information to add to this answer.
See the answer to "What is pyloric stenosis"?
In pyloric stenosis, the muscular wall of the passage becomes abnormally thickened. This causes the pylorus to become too narrow, which prevents food from emptying out of the stomach in a normal fashion
Pulmonary valve stenosis is caused by a congenital malformation in which the pulmonary valve does not open properly
Pyloric stenosis is abnormal narrowing of the pyloric sphincter.
Stenosis means abnormal narrowing. Pyloric stenosis is the medical term meaning narrowing of the pyloric sphincter.
Pulmonary stenosis is almost entirely congenital.
The most common cause is pyloric stenosis, a malformation of the pyloric valve that empties the stomach contents into the small intestine. It is easily managed surgically, but other conditions (below) can also cause projectile vomiting:This information shows the various causes of Projectile vomiting similar to pyloric stenosis, and how common these diseases or conditions are in the general population. This is not a direct indication as to how commonly these diseases are the actual cause of Projectile vomiting similar to pyloric stenosis, but gives a relative idea as to how frequent these diseases are seen overall.2 diseases that are "common".5 diseases that are "very rare".27 diseases without any prevalence information.
pyloric stenosis surgery
Classically, projectile vomiting in infant
Has anyone heard of this link? I doubt it. Mebbee a joke?
Aortic stenosis is a condition in which there is a narrowing of the opening of the aortic valve in the heart. This causes decreased blood flow from the heart. It can be a congenital heart defect, or it can occur later in life as the result of calcium deposit in this valve.
Mitral valve stenosis in adults, for example, is rarely congenital and is usually acquired, either a result of having rheumatic fever as a child or developing calcium obstruction in the valve later in life.
Hereditary condition Congenital spinal stenosis
mumps, gastroesophageal reflux disorder, ulcers, pyloric stenosis, appendictis
The scar on Jon Cryer stomach is as a result of the pyloric stenosis surgery he had.
In adults the pyloric muscle or valve can be closed by scarring (from ulceration) or cancer. Sometimes pyloric stenosis in infancy is not severe enough to warrant surgery and for whatever reason some of these children grow up still having problems with their pyloric function. Problems with the pyloric sphincter in adults can be managed by medication, lifestyle changes, and/or surgery.
Pediatric nursing and medical textbooks would seem the best place to go. There are also many websites with more general information on the care of infants with pyloric stenosis, which usually involves pre- and post-operative pediatric matters.
The two main causes of renal artery stenosis are atherosclerosis and fibromuscular disease.
insufficiency, as in the opposite of aortic stenosis is aortic insufficiency Actually stenosis is narrowing and therefore causes insufficiency. The opposite of stenosis would be dilation.
a complex interaction of genetic and environmental factors. Aqueductal stenosis, an obstruction of the cerebral aqueduct, is the most frequent cause of congenital hydrocephalus