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17 Cards in this Set
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- Back
- 3rd side (hint)
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►►Fate of pharyngeal grooves and membrane
1st groove/membrane |
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grooves/Membranes 2nd 3rd 4th = |
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Anomalies of Head & Neck
►Most defects represent remnants of the _______ _______ that normally disappear as the adult structures develop. |
pharyngeal apparatu
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Cysts-
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is a closed sac (below the surface of the skin)
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Sinuses-
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abnormal narrow cavity.
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Fistula-
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abnormal connection or passage way between two epithelium-lined organs or vessels
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Congenital Auricular Sinuses and Cysts
Located in the area anterior to the auricl Minor congenital anomaly Remnant of = |
1st P. groove
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External branchial sinuses
failure of the = |
second pharyngeal groove and the cervical sinus to obliterate.
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External branchial sinuses
Detected during infancy because= |
of discharge of mucous.
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Branchial
Sinuses Opens typically along the = |
anterior border
of the SCM |
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Branchial fistula is what =
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Abnormal canal that opens internally into the tonsillar sinus and externally in the side of the neck
Results from persistence of parts of = |
2nd P.groove and 2nd P.Pouch.
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Remnants of parts of the cervical sinus and/or the second pharyngeal groove may persist and form a spherical or elongated cyst .
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Branchial Cysts
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Branchial Cysts
Become apparent during late childhood or early adulthood, when they produce a = |
painless, slowly enlarging swelling in the neck
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Branchial Cysts are Remnants of parts of the =
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cervical sinus and/or the second pharyngeal groove may persist and form a spherical or elongated cyst .
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Fate of !st Pouch =
Nm= 2ct= |
Tubotympanic Recess =
-Tympanic cavity distal -Auditory Tube Proximal |
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Fate of 2nd Pouch =
1ct |
Palatine Tonsil
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Fate of 3rd Pouch =
2ct = |
-Inferior PT Gland Dorsal Portion
-Thymus Ventral Portion |
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Fate of 4th Pouch =
3ct 5th Pouch is = |
4th pouch =
-Sup-PT Gland Dorsal -Ultimobranchial body (Ventral) into... 5th Pouch -Parafollicular Cells |
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