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Ebstein anomaly is a condition associated with bicuspid valve displacement towards the apex.

Hydrocephalus is associated with Arnold-Chiari malformation where part of the cerebellum herniates into the foramen magnum

Identify the brain structure/region label with the number 3 in the image below:

An ostium primum defect is associated with a defect in the atrial septum combined with a cleft in the anterior leftlet of the tricuspid valve.

The anterior/ventral gray horn is identified by the number ____, in the image below.

In the image below, the globus pallidum is identified by the number ____.

Achondroplasia is the most common, lethal form of skeletal dysplasia that presents with short, curved femurs and a severe cloverleaf skull.

Exposure to teratogens like valproic acid, ____________, and oligohydramnios are all non-genetic causes of craniosynostosis.

What grading criteria does a proficiency testing program use to grade the reported sample results from its participating laboratories? 

A 22-year-old woman presents with primary amenorrhea and cyclic pelvic pain. Physical exam reveals a shortened vagina and no visible cervix. Imaging confirms a hypoplastic uterus and obstructed vaginal canal. On further history, the patient reports that her mother took a nonsteroidal estrogen during early pregnancy. Which of the following medications is most likely responsible for this patient’s congenital anomaly?