structures that may be penetrated by a horizontal stab wound from the anterior midline to the space between the second and third tracheal rings.

Introduction: the structures that may be penetrated  by a horizontal stab wound at the level of
the second and third trachea rings in the anterior midline are the anterior
relations of the trachea.
Anterior relations of the trachea: from superficial deep
are:
1.      
Skin
2.      
Superficial fascia
3.      
Investing fascia
4.      
Sternohyoid
5.      
Sternothyroid
6.      
Pretracheal fascia
7.      
Anterior jugular vein
8.      
Thyroid isthmus
9.      
Trachea.

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