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Updated: Feb 23, 2026
Intravital Microscopy of Tumor-associated Vasculature Using Advanced Dorsal Skinfold Window Chambers on Transgenic Fluorescent Mice
Published on: January 19, 2018
Contrast enhanced ultrasound imaging can predict vascular-targeted photodynamic therapy induced tumor necrosis in
F H Cornelis1, K Kim2, J C Durack1
1Interventional Radiology Service, Department of Radiology, Memorial Sloan-Kettering Cancer Center,1275 York Avenue, New York, NY 10065, USA; Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; Plant Science, Weizmann Institute of Science, Rehovot, Israel.
Aims:
To evaluate the accuracy of contrast-enhanced ultrasound (CEUS) for monitoring tumor necrosis following WST-11 vascular targeted photodynamic therapy (VTP) using imaging-pathology correlation.
Methods:
Renal adenocarcinoma cells were injected into the hindlimb of 13 BalB/c mice resulting in tumors ranging from 9.8 to 194.3mm3. US guidance was used to place a laser fiber into the tumor, and VTP was performed. CEUS was performed prior to animal sacrifice, 24h post-VTP. Whole tumors were extracted for histopathologic analysis using H&E and TUNEL staining. Pathology samples corresponding to the CEUS imaging plane were prepared in order to compare the size and extents of tumor necrosis.
Results:
Tumor necrosis following VTP appeared as a central region of non-enhancement on CEUS, while viable tumor appeared as patchy regions of enhancement in the tumor periphery. The region of tumor necrosis measured in mean 66% and 64.8% of total tumor area on CEUS and pathology respectively (p=0.2). The size and location of the necrosis on CEUS images and pathology samples were found correlative with no inter-observer difference (weighted kappa of 0.771 and 0.823, respectively).
Conclusion:
CEUS allows accurate monitoring of VTP induced tumor necrosis in a small animal model.
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