What is Branchial sinus?
What is Branchial sinus?
A branchial cleft is also called a cleft sinus. It is a lump or cyst that develops in your neck or near your collarbone. It develops in the womb before birth and is usually diagnosed shortly after birth.
What is a branchial cleft embryology?
Embryology. Branchial cleft cysts develop early during gestation. During week 4 of embryonic development, four branchial (pharyngeal) clefts form five ridges. These ridges contribute to the formation of portions of the head, neck, and thorax. These mesodermal ridges form the 6 branchial (pharyngeal) arches.
How can you tell the difference between cystic hygroma and branchial cyst?
Dermoid cysts occur in the midline and differ in location from the cyst in the present case. All these lesions differ in microscopic features from branchial cleft cyst. Cystic hygroma occurs in the posterior triangle of the neck that is posterior to the sternocleidomastoid muscle.
How do you diagnose a branchial cyst?
Branchial cleft abnormalities are diagnosed by a physical exam. Diagnostic tests include ultrasound and CT scans. Branchial cleft abnormalities are usually small.
What is First branchial cleft sinus?
First branchial cleft cysts develop as a result of the incomplete fusion of the cleft between the first and second branchial arches (see branchial apparatus). There may be a sinus with drainage to the external ear or skin. They typically occur within or close to the parotid gland or external auditory canal.
What is branchial anomaly?
Branchial cleft cysts (also called branchial cleft remnants or branchial cleft anomalies) are a congenital condition (condition present at birth) in which tissue develops incorrectly on one or both sides of the neck. Branchial cleft cysts sometimes have openings on the inside or outside of the skin called sinus tracts.
What is difference between pharyngeal arch and branchial arch?
The pharyngeal arches, also known as visceral arches, are structures seen in the embryonic development of vertebrates that are recognisable precursors for many structures. In fish, the arches are known as the branchial arches, or gill arches.
What causes a branchial cyst to swell?
A painful lump or swelling under the skin on your neck. This can happen if your branchial cleft cyst becomes infected. Some cleft cysts might ooze fluid through the punctum, which is a tiny point at the top of your cyst.
What is the difference between branchial cyst and branchial fistula?
These structures may connect with the skin only and drain sloughed skin through a small opening on the skin (branchial sinus); with the skin and the throat lining and drain mucous through a small opening on the skin (branchial fistula); or have no connection at all and slowly grow over time (branchial cyst).
What is branchial fistula?
Branchial cleft fistulae are rare congenital abnormalities that arise from the abnormal persistence of branchial apparatus remnants. A complete fistula is a tract that has an internal opening and an external opening.
How many branchial clefts are there?
Four branchial clefts (also called “grooves”) form during the development of a human embryo. The first cleft normally develops into the external auditory canal, but the remaining three arches are obliterated and have no persistent structures in normal development.
What is First branchial cleft?
First branchial cleft anomalies are rare congenital malformations of the head and neck. They occur above the level of the hyoid bone and have a close anatomical relationship to the facial nerve owing to their embryologic origin.
Are branchial cysts benign?
Branchial cleft cysts are benign lesions caused by anomalous development of the branchial cleft. Cases that arise in the lateral neck region are often misdiagnosed, resulting initially in inappropriate management.
Should a branchial cyst be removed?
Infected branchial cleft cysts or sinuses require antibiotic treatment. If there are persistent problems with drainage or infection, these cysts should be surgically removed. Most branchial cleft remnants require no treatment. If surgery is required, results are usually good.