US
Ocular ultrasonography is useful in evaluation of an ocular tumor and
commonly used as a first-line imaging technique for screening of ocular
pathology in the pediatric population. It maintains an advantage in
pediatric patients due to low cost, wide availability, lack of radiation
exposure and can often be done without sedation. It is also sensitive
for detection of calcification8. US can easily
evaluate mass lesions of the globe. However, the visualization of deeper
lesions, including retrobulbar lesions, is limited as the US wave cannot
adequately penetrate to such deep structures. Furthermore,
calcifications can obscure adjacent lesions and consequently limit
assessment of the optic nerve. US alone is therefore not an adequate,
complete diagnostic tool for definitive evaluation/ staging of ocular
tumors such as retinoblastoma and medulloepithelioma.