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.
However, the above types of cyst contain keratin, not sebum, and neither originates from sebaceous glands (epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles).Therefore technically speaking they are not sebaceous cysts.True sebaceous cysts (i.e. cysts which originate from sebaceous glands and which contain sebum) are relatively rare and are known as steatocystomas or, if multiple, as steatocystoma multiplex.owever, the above types of cyst contain keratin, not sebum, and neither originates from sebaceous glands (epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles).