HEAD AND NECK: Orbits

B-1Malformation of the Orbit
B-2Hypotelorism (Decreased Interorbital Distance)
B-3-1Hypertelorism
B-3-2Congenital Syndromes with Hypertelorism
B-4Small Orbit and/or Optic Canal
B-5Large Orbit
B-6-1Orbital Lesions Arising within the Orbit - Intraocular or Intraconal Mass
B-6-2Intraocular Mass in a Child (See also B-6-1,B-7-S)
B-6-3Orbital Lesions Arising within the Orbit - Choroidal Mass
B-6-4Orbital Lesions Arising within the Orbit - Extraconal or Muscle Mass
B-6-5Orbital Lesions Arising Extraorbitally or Extracranially (eg, from nasopharynx, nasal cavity, paranasal sinus, orbital bone, or infratemporal fossa)
B-6-6Orbital Lesions Arising Intracranially with Secondary Involvement of Orbit
B-7-SCT Characteristics of Orbital Masses in Children
B-8Bony Defect, Erosion, or Radiolucent Lesion of the Orbit (See also B-11,B-12)
B-9Sclerosis and Thickening of the Orbital Roof or Walls
B-10Narrowed Superior Orbital (Sphenoidal) Fissure
B-11Enlarged Superior Orbital (Sphenoidal) Fissure (Erosion and Widening)
B-12Localized Bony Defect or Erosion About the Optic Canal (See also B-8,B-13)
B-13Optic Canal Enlargement (greater than 6.5 mm in diameter) (See also B-12,B-14)
B-14Optic Nerve Enlargement (CT, MRI)
B-15Optic Nerve "Tram-Track" Sign (Distinct Optic Nerve with Perineural Enhancement) (CT)
B-16Enlargement of the Rectus Muscles of the Eye (CT, MRI)
B-17Unilateral Exophthalmos (Proptosis)
B-18Deformity and Dimensional Changes in the Eyeball (CT, MRI)
B-19Intraorbital Calcification (See also B-20,B-21)
B-20Globe Calcification (CT)
B-21Extraglobal Calcification (CT)
B-22Periorbital Soft Tissue Swelling
B-23Lacrimal Gland Enlargement