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Classification of postoperative cheek cysts. In the conventional system, a line is drawn between the anterior end of the inferior turbinate and base of the lateral pterygoid process (red lines). A medial cyst (A) extends toward the midline across this imaginary line, and a lateral cyst is classified as anterolateral (B) or posterolateral (C) based on the position of the center of the cyst with reference to another line (red dotted lines) that lies vertically to the initial line.
