How do you account for tumor growth from pre-operative to intra-operative ultrasound for uveal melanoma?

On B scan, measure the thickness from apex AP and also do basal measurements. Base measurements are done through indirect ophthalmoscope also. At each visit, pre-op and postop, both B scan measurements (for tumor thickness) are done and also indirect ophthalmoscope measurements. My twin sister is an...

PDT: photodynamic therapy for amelanotic melanoma.

Intravitreal chemotherapy is under investigation and also intra-arterial chemotherapy (not yet standard of care)