The superior orbital fissure is a foramen in the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of the sphenoid bone. 1  1 Structures passing through. number of important anatomical structures pass through the fissure, and these can be damaged in orbital trauma, particularly blowout fractures through the floor of the orbit into the maxillary sinus. These structures are:
To research the causes of Dermoid cyst, consider researching the causes of these these diseases that may be similar, or associated with Dermoid cyst: 1  Squamous cell carcinoma. 2  Encephalocele. 3  Sebaceous cyst.
Sebaceous cysts are the most common type of cysts seen in the ear. These sack-like lumps are made up of dead skin cells and oils produced by oil glands in the skin. The exact cause of the problem is unknown. Cysts may occur when oils are produced in a skin gland faster than they can be released from the gland. Benign bony tumors of the ear canal (exostoses and osteomas) are caused by excess growth of bone. Repeated exposure to cold water may increase the risk of benign bony tumors of the ear canal. The symptoms of cysts include: Pain (if cysts are in the outside ear canal or if they get infected)