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Published on: September 19, 2014
Molecular imaging to identify tumor recurrence following chemoradiation in a hostile surgical environment
Abstract:
Surgical biopsy of potential tumor recurrence is a common challenge facing oncologists, surgeons, and cancer patients. Imaging modalities have limited ability to accurately detect recurrent cancer in fields affected by previous surgery, chemotherapy, or radiation. However, definitive tissue diagnosis is often needed to initiate treatment and to direct therapy. We sought to determine if a targeted fluorescent intraoperative molecular imaging technique could be applied in a clinical setting to assist a surgical biopsy in a "hostile" field. We describe the use of a folate-fluorescein conjugate to direct the biopsy of a suspected recurrent lung adenocarcinoma invading the mediastinum that had been previously treated with chemoradiation. We found that intraoperative imaging allowed the identification of small viable tumor deposits that were otherwise indistinguishable from scar and necrosis. Our operative observations were confirmed by histology, fluorescence microscopy, and immunohistochemistry. Our results demonstrate one possible application and clinical value of intraoperative molecular imaging.
Insights
Targeted fluorescent molecular imaging helps surgeons precisely biopsy recurrent lung cancer in difficult surgical fields. This technique identifies viable tumor deposits missed by standard methods, improving diagnostic accuracy.
Area of Science:
- Oncology
- Surgical Oncology
- Molecular Imaging
Background:
- Accurate diagnosis of recurrent cancer after treatment is challenging due to imaging limitations in post-surgical/radiation fields.
- Definitive tissue diagnosis is crucial for guiding cancer treatment and therapy.
- Current methods struggle to differentiate recurrent tumors from scar tissue and necrosis.
Observation:
- A folate-fluorescein conjugate was used for intraoperative molecular imaging in a patient with suspected recurrent lung adenocarcinoma.
- The imaging technique was applied in a "hostile" surgical field previously treated with chemoradiation.
- The technique aimed to assist surgical biopsy by highlighting tumor recurrence.
Findings:
- Intraoperative molecular imaging successfully identified small, viable tumor deposits.
- These deposits were previously indistinguishable from scar tissue and necrosis on conventional imaging.
- Histology, fluorescence microscopy, and immunohistochemistry confirmed the imaging findings.
Implications:
- Intraoperative molecular imaging offers a valuable tool for surgical biopsy in complex oncological cases.
- This technique can improve the accuracy of diagnosing tumor recurrence in challenging clinical scenarios.
- It demonstrates potential clinical value for guiding cancer therapy and patient management.
