This later led to the synonym Mende syndrome being recorded in some databases.In 1929, Dutch physician K. T. A. Halbertsma described a familial pattern to dystopia canthorum, and in 1930, Italian physician Vincenzo Gualdi (1891–1976) also confirmed a hereditary pattern to dystopia canthorum. This later led to the synonym Van der Hoeve–Halbertsma–Waardenburg–Gualdi syndrome being recorded in some databases.In 1947, Swiss ophthamologist David Klein (1908–1993) first reported a patient with bilateral deafness, pigmentation deficiencies, characteristic facial features and malformation of the arms. Although this was the first full description of a patient with Waardenburg syndrome type 3, contemporary clinicians did not consider the syndrome he described to be the same as that described by Waardenburg four years later, in part due to how severe the arm malformations were in his patient.The syndrome was first fully formalised and described by Dutch ophthalmologist and geneticist Petrus Johannes Waardenburg (1886–1979) in 1951. The condition he described is now categorised as Waardenburg syndrome type 1. Descriptions of subtypes
Type 2 was first established in 1971 when a study noticed that some Waardenburg syndrome patients did not have dystopia canthorum. A 1977 study confirmed a familial pattern to this other presentation.
When the bile can not be properly propelled from the not-mechanically-obstructed gallbladder or can not flow out of the end of the common bile duct properly, there is a state of biliary dyskinesia. So, biliary dyskinesia is a dynamically (functional...not fixed mechanical) obstructive, pain-producing disorder. Obstruction by a stone or tumor is a static, mechanical obstruction and tends to produce a more intense pain known as biliary colic. Failure of the biliary sphincter of Oddi can be distinguished from failure of the pancreatic sphincter. Diagnosis
Diagnosis may or may not be determined by an ultrasound, but most likely the disease and other biliary diseases of the liver, gallbladder, and bile duct are found by what is most commonly referred to as a hepatobiliary or HIDA scan. This type of imaging is known as cholescintigraphy. Cholescintigraphy
Cholescintigraphy or hepatobiliary scintigraphy is scintigraphy of the hepatobiliary tract, including the gallbladder and bile ducts. The image produced by this type of medical imaging, called a cholescintigram, is also known by other names depending on which radiotracer is used, such as HIDA scan, PIPIDA scan, DISIDA scan, or BrIDA scan. Cholescintigraphic scanning is a nuclear medicine procedure to evaluate the health and function of the gallbladder and biliary system. A radioactive tracer is injected through any accessible vein and then allowed to circulate to the liver and starts accumulating in the gall bladder which can take up to an hour.