Nasolacrimal obstruction: Cause of 30-50% of cases of epiphora (tears from eye overflow)
Mechanical obstruction
Obstruction: Complete obstruction of nasolacrimal system
Stenosis: Partial obstruction of nasolacrimal system
Functional obstruction
Abnormal lacrimal pump function
Problem with contraction of orbiculari oculi muscle necessary for tears to drain properly
IMAGING
Radiographic Findings
Nuclear Medicine Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Reporting Tips
Selected References
Sia PI et al: Interobserver agreement on interpretation of conventional dacryocystography and dacryoscintigraphy findings: A retrospective single-centre study. Clin Exp Ophthalmol. ePub, 2019
Gokhale SM: Dacryoscintigraphy: A pictorial essay. Indian J Nucl Med. 33(3):214-7, 2018
Sagili S et al: Lacrimal scintigraphy: "interpretation more art than science". Orbit. 31(2):77-85, 2012
Related Anatomy
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Definitions
Nasolacrimal obstruction: Cause of 30-50% of cases of epiphora (tears from eye overflow)
Mechanical obstruction
Obstruction: Complete obstruction of nasolacrimal system
Stenosis: Partial obstruction of nasolacrimal system
Functional obstruction
Abnormal lacrimal pump function
Problem with contraction of orbiculari oculi muscle necessary for tears to drain properly
IMAGING
Radiographic Findings
Nuclear Medicine Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Reporting Tips
Selected References
Sia PI et al: Interobserver agreement on interpretation of conventional dacryocystography and dacryoscintigraphy findings: A retrospective single-centre study. Clin Exp Ophthalmol. ePub, 2019
Gokhale SM: Dacryoscintigraphy: A pictorial essay. Indian J Nucl Med. 33(3):214-7, 2018
Sagili S et al: Lacrimal scintigraphy: "interpretation more art than science". Orbit. 31(2):77-85, 2012
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