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Written by Administrator
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Friday, 11 December 2009 08:40 |
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THYROGLOSSAL CYST Aetiology:
Unobliterated portion of thyroglossal duct
Pathology:
Cystic swelling at any part of the thyroglossal duct, commonest below the hyoid bone " Infra hyoid". It is lined by squamous epithelium and filled with mucoid containing cholesterol crystals.
Foramen Caecum.
Hyoid bone
Pyramydal lobe Congenital abnormalities of thyroid development
Clinical Picture:
Age: Child
Site: - Infra hyoid in the middle line or to the Lt.
- Suprahyoid in the middle line.
Size: usually small.
Shape: Globular.
Surface: Smooth not attached to underlying structure.
Skin over: Freely mobile over the cyst.
Special signs:
1- Moves up and down with deglutition.
2- Moves up with protrusion of the tongue.
3- The tract connecting it to the base of the tongue may be felt.
D.D.: Cyst in the middle line of the neck " see later ".
Complications: Infection is common because lymphatics in the wall is cummunicated with lymphatics in the neck. If drained either spontaneously or surgically will give thyroglossal fistula.
Treatment:
Complete excision with its tract up to the base of the tongue " Sistrunk operation"
FN.B. We must be sure of the presence of thyroid gland either by isotope scanning or surgical exposure. WHY? As thyroglossal cyst may contain the only thyroid tissues in the body .SOURCE: Prof. AYMAN SALEM'S BOOK
Copyright: (Vascular Society of Egypt ) & (Medical Educational web)
Not to be reproduced without permission of Vascular Society of Egypt
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