BACKGROUND: Photoactive drugs selectively accumulate in malignant tissue specimens and cause drug-induced fluorescence. Photodynamic diagnosis (PDD) and fluorescence can distinguish normal from malignant tissue. OBJECTIVE METHODS: From May 2012 to September 2013, a total of 70 patients underwent hepatic resections using 5-ALA-mediated PDD for liver tumors at our hospital. RESULTS: 5-ALA fluorescence was detected in all hepatocellular carcinoma cases with serosa invasion. In liver metastasis from colorectal cancer cases with serosa invasion, 18 patients (85.7 %) were detected, and three patients (14.2 %) whose tumors showed complete response to neoadjuvant chemotherapy showed no fluorescence. Both superficial and deep malignant liver tumors were detected with 92.5 % sensitivity. Using 5-ALA-mediated PDD, tumors remaining at the cut surface and postoperative bile leakage were less frequent than in our previous hepatic resections using conventional white-light observation. Moreover, all malignant liver tumors were completely removed with a clear microscopic margin using 5-ALA, with a significant difference in resection margin width between 5-ALA-mediated PDD (6.7 ± 6.9 mm) and white-light observation (9.2 ± 7.0 mm; p = 0.0083). CONCLUSIONS: With the detection of malignant liver tumors, residual tumor and bile leakage at the cut surface of the remnant liver were improved by PDD with 5-ALA. This procedure may provide greater sensitivity than the conventional procedure. Furthermore, 5-ALA-mediated PDD can ensure histological clearance regardless of the resection margin and preserve as much liver parenchyma as possible in patients with impaired liver function.
BACKGROUND: Photoactive drugs selectively accumulate in malignant tissue specimens and cause drug-induced fluorescence. Photodynamic diagnosis (PDD) and fluorescence can distinguish normal from malignant tissue. OBJECTIVE METHODS: From May 2012 to September 2013, a total of 70 patients underwent hepatic resections using 5-ALA-mediated PDD for liver tumors at our hospital. RESULTS:5-ALA fluorescence was detected in all hepatocellular carcinoma cases with serosa invasion. In liver metastasis from colorectal cancer cases with serosa invasion, 18 patients (85.7 %) were detected, and three patients (14.2 %) whose tumors showed complete response to neoadjuvant chemotherapy showed no fluorescence. Both superficial and deep malignant liver tumors were detected with 92.5 % sensitivity. Using 5-ALA-mediated PDD, tumors remaining at the cut surface and postoperative bile leakage were less frequent than in our previous hepatic resections using conventional white-light observation. Moreover, all malignant liver tumors were completely removed with a clear microscopic margin using 5-ALA, with a significant difference in resection margin width between 5-ALA-mediated PDD (6.7 ± 6.9 mm) and white-light observation (9.2 ± 7.0 mm; p = 0.0083). CONCLUSIONS: With the detection of malignant liver tumors, residual tumor and bile leakage at the cut surface of the remnant liver were improved by PDD with 5-ALA. This procedure may provide greater sensitivity than the conventional procedure. Furthermore, 5-ALA-mediated PDD can ensure histological clearance regardless of the resection margin and preserve as much liver parenchyma as possible in patients with impaired liver function.
Authors: Johannes Gahlen; Ruediger L Prosst; Matthias Pietschmann; Thomas Haase; Markus Rheinwald; Gisela Skopp; Josef Stern; Christian Herfarth Journal: Ann Surg Date: 2002-02 Impact factor: 12.969
Authors: T Takayama; M Makuuchi; S Hirohashi; M Sakamoto; J Yamamoto; K Shimada; T Kosuge; S Okada; K Takayasu; S Yamasaki Journal: Hepatology Date: 1998-11 Impact factor: 17.425