pharyngeal arches 01

PHARYNGEAL ARCHES 01

26 DAY EMBRYO: This is a frontal section through the pharyngeal region of a 26 day embryo. Locate and identify the following: DIENCEPHALON, OPTIC STALK, OPTIC CUP, PHARYNGEAL ARCHES, ECTODERMAL

COVERING OF ARCH, ENDODERMAL LINING OF ARCH, MESODERMAL CORE OF ARCH, AORTIC ARCHES, HEAD MESENCHYME and SPINAL CORD.

PHARYNGEAL ARCHES 02

SECOND PHARYNGEAL ARCH CYST:

PHARYNGEAL ARCHES 03

CT SCAN OF SECOND ARCH CYST: How does such a cyst develop?

PHARYNGEAL ARCHES 04

SECOND ARCH SINUS OR FISTULAE: How would you differentiate between a sinus and a fistulae?

PHARYNGEAL ARCHES 05

SECOND ARCH FISTULAE: Why?

PHARYNGEAL ARCHES 06

THYROGLOSSAL DUCT CYST. How does this condition develop?

PHARYNGEAL ARCHES 07

CT SCAN OF THYROGLOSSAL DUCT CYST

PHARYNGEAL ARCHES 08

SUPRA LINGUAL THYROID: How would you treat this abnormality?

PHARYNGEAL ARCHES 09

SUBLINGUAL THYROID: How would you treat this?

PHARYNGEAL ARCHES 10

HYPOTHYROIDISM: (also know as cretinism) What are the identifying characteristics of this condition?

PHARYNGEAL ARCHES 11

HYPERTHYROIDISM: How might this condition arise. What are the identifying characteristics?

PHARYNGEAL ARCHES 12

FIRST ARCH SYNDROME (TREACHER-COLLINS SYNDROME): Identify the characteristics of First Arch

Syndrome. How does this condition arise embryologically?

PHARYNGEAL ARCHES 13FIRST ARCH SYNDROME (TREACHER-COLLINS SYNDROME): Identify the characteristics of First Arch

Syndrome. How does this condition arise embryologically?

PHARYNGEAL ARCHES 14FIRST ARCH SYNDROME (TREACHER-COLLINS SYNDROME): Identify the characteristics of First Arch

Syndrome. How does this condition arise embryologically?

PHARYNGEAL ARCHES 15

MICROGNATHIA (PIERRE ROBIN SYNDROME): With which arch is this abnormality associated?

PHARYNGEAL ARCHES 16

FIRST PHARYNGEAL ARCH CYST: How do you know this is a first arch cyst?