The tomography is useful for the evaluation of the bony structures and presence of calcifications.
The extent of the lesion and its relation with the soft tissues is performed with magnetic resonance.
The presence of bone changes,
unilateral compromise,
contrast enhancement,
clinical presentation are the basis for adequate diagnosis.
we review imaging cases of our teaching file of patients with orbital and lacrimal gland lesions.
Two–phase,
dynamic enhanced CT technique to help differentiate lymphoma
from inflammatory disease.
CT and MRI features of bilateral lacrimal enlargement due to inflammation/infiltration.
CT - MRI features of bilateral lacrimal inflammation /
infiltration
CT
Bilateral involvement
Enlarged gland moulds the globe
Contrast enhancement: moderate
Bone involvement
MRI T1/T2: Isointense to muscle
Contrast enhancement: moderate
CT - features of unilateral lacrimal inflammation
Mild to moderate enhancement
oblong enlargement
Moderate to intense enhancement
lateral rectus involvement with scleritis & fluid in the Tenon’s
capsule.
CT - MRI features of benign mixed tumour (BMT)
CT Solid (can be heterogenous)
Well defined
Round or Oval
Calcification – occasional
Bony remodeling
MRI Tl: Iso – hypointense to muscle
T2: Iso - hyperintense to muscle
Contrast enhancement: moderate to marked
CT - MRI features of adenoid cystic carcinoma (ACC)
CT
Solid
Irregular margins ( can be well circumscribed)
Nodularity,
Infiltration of adjacent tissue
Calcification
Bony destruction
MRI T1/T2: Isointense to muscle
Moderate enhancement
Perineural spread