Definition
Inflammation of lacrimal gland

Differentials
Lacrimal Gland infection (mumps, mono, bacterial)
Ruptured Dermoid Cyst
Malignant Lacrimal Gland tumor - onset is not actue

Signs
Swelling of lateral aspect of upper lid
Pain & discomfort in lacrimal gland region
S-shaped ptosis

Causes
Idiopathic
Orbital Inflammatory Disease

Treatment
Resolves spontaneously.  No treatment necessary.