The choroid plexus of the fourth ventricle consists of two symmetrical parts located in the roof of the ventricle and protruding through its openings, the foramina of Luschka and Magendie. PICA supplied most of the choroid plexus in the roof and the median opening of the fourth ventricle.

What does choroid plexus cyst indicate?

When a doctor discovers a choroid plexus cyst, their most immediate concern is the possibility of the baby having trisomy 18, a genetic condition. Babies with trisomy 18 have an extra copy of chromosome number 18. Most of the time, a baby confirmed to have trisomy 18 is stillborn.

What would happen if the choroid plexus produces excessive CSF?

This excess CSF in the brain (hydrocephalus) can create pressure in the brain that can be dangerous. Even if a CPP is not cancer, it can still cause problems. It may press against brain tissue and cause symptoms, such as headache, vision problems, or nausea and vomiting.

Where is the choroid plexus location in the lateral ventricle?

The choroid plexus of the lateral ventricles is found in the superomedial portion of the inferior horn and the anteromedial portion of the body. The plexus found in these areas also continue into the atrium.

What is the 4th ventricle of the brain?

The fourth ventricle contains cerebrospinal fluid. It has a diamond shape and is located in the upper portion of the medulla. The main function of this ventricle is to protect the human brain from trauma (via a cushioning effect) and to help form the central canal, which runs the length of the spinal cord.

Why is it called choroid plexus?

Choroid plexus translates from the Latin plexus chorioides, which mirrors Ancient Greek χοριοειδές πλέγμα. The word chorion was used by Galen to refer to the outer membrane enclosing the fetus. Both meanings of the word plexus are given as pleating, or braiding.

Does a choroid plexus cyst mean Down syndrome?

Choroid plexus cysts may be detected in the fetal choroid plexus on routine second trimester ultrasound scanning. The presence of these cysts is associated with trisomy 18 (Edward syndrome) in 3.47% of cases and with trisomy 21 (Down syndrome) in 0.46% of cases.

What does the 4th ventricle connected to?

The fourth ventricle is connected to the third ventricle by a narrow cerebral aqueduct. The fourth ventricle is a diamond-shaped cavity located posterior to the pons and upper medulla oblongata and anterior-inferior to the cerebellum.

Where does the choroid plexus supply the third ventricle?

The path of choroid plexus from each lateral ventricle joins along the roof of the third ventricle and projects into the superior part of the ventricle. The choroid plexus of the third ventricle is supplied by the medial posterior choroidal arteries (branch of posterior cerebral artery).

What week of pregnancy does the choroid plexus develop?

Signs of choroid plexus development of the fourth ventricle are evident around the 6th or 7th week of gestation, with the choroid plexus of the lateral ventricles developing at the same time, or shortly after in week 7. The choroid plexus of the third ventricle generally begins to develop a bit later in week 8.

What is the prognosis of choroid plexus cysts?

More than 90% resolve by 26 weeks. Single or multiple cystic areas (>2 mm in diameter) in one or both choroid plexuses of the lateral cerebral ventricles. Associated with increased risk for trisomy 18 and possibly trisomy 21.

What is the difference between CT and MRI for choroid plexus?

On CT the main differential is that of a cyst of the choroid plexus. On MRI, the diagnosis is usually readily made, with the two potential differential being: acute infarction of the choroid plexus 3 both can have high signal on DWI.