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Choroid Plexus Cyst

KEY FACTS Terminology Choroid plexus cysts (CPC) are unilocular cysts usually located in the posterior thick portion of choroid plexus You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

Holoprosencephaly

KEY FACTS Terminology Alobar holoprosencephaly (HPE) implies complete or nearly complete lack of cerebral hemisphere separation You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

Cephalocele

KEY FACTS Terminology Defect in skull with protrusion of intracranial structures Encephalocele: Cerebrospinal fluid (CSF), brain tissue, and meninges Meningocele: Meninges and CSF You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

Brain and Spine

EMBRYOLOGY AND ANATOMY Key Embryological Concepts Multiple processes occur during embryological development of brain and spine Neurulation : Ectodermal cells form midline neural plate in which folds develop then fuse to create a tube with openings at either end Neurulation → neural tube + neural crest – Neural tube → brain, spinal cord – Neural crest → peripheral nerves, autonomic nervous system Neuronal proliferation : Neurons…

Perigestational Hemorrhage

KEY FACTS Terminology Perigestational hemorrhage (PGH): Hematoma in subchorionic space adjacent to gestational sac (GS) Subchorionic hematoma is synonymous with PGH You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here

First Trimester

EMBRYOLOGY AND ANATOMY Key Embryological Events Multiple events occur in 1st trimester Ovulation with resultant corpus luteum in ovary Fertilization of ovum → zygote Zygote cleavage → blastocyst → embryoblast + trophoblast Implantation → intrauterine sac-like structure Embryonic development, organogenesis Development of placenta, umbilical cord Embryoblast cells form embryo and amnion Bilaminar embryonic disc forms when embryoblast splits into epiblast and hypoblast Trilaminar disc develops by…

Epidermoid Cyst

KEY FACTS Terminology Slow-growing subdermal cyst that contains keratin and is lined by stratified squamous epithelium Does not contain dermal elements (dermoid cyst) You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here