Photodynamic hyperthermal chemotherapy with indocyanine green: a novel cancer therapy for 16 cases of malignant soft tissue sarcoma
2014
Onoyama, M., Yamaguch University, Yamaguch, Japan | Tsuka, T., Tottori University, Tottori, Japan | Imagawa, T., Tottori University, Tottori, Japan | Osaki, T., Tottori University, Tottori, Japan | Minami, S., Tottori University, Tottori, Japan | Azuma, K., Tottori University, Tottori, Japan | Kawashima, K., Aino Animal Hospital, Shizuoka, Japan | Ishi, H., Tokyo Animal Medical Center, Tokyo, Japan | Takayama, T., Takayama Pet clinic, Osaka, Japan | Ogawa, N., Takayama Pet clinic, Osaka, Japan | Okamoto, Y., Yamaguch University, Yamaguch, Japan
Sixteen cases of malignant soft tissue sarcoma (STS; 10 canines and six felines) were treated with a novel triple therapy that combined photodynamic therapy, hyperthermia using indocyanine green with a broadband light source, and local chemotherapy after surgical tumor resection. This triple therapy was called photodynamic hyperthermal chemotherapy (PHCT). In all cases, the surgical margin was insufficient. In one feline case, PHCT was performed without surgical resection. PHCT was performed over an interval of 1 to 2 weeks and was repeated three to 21 times. No severe side effects, including severe skin burns, necrosis, or skin suture rupture, were observed in any of the animals. No disease recurrence was observed in seven out of 10 (70.0%) dogs and three out of six (50.0%) cats over the follow-up periods ranging from 238 to 1901 days. These results suggest that PHCT decreases the risk of STS recurrence. PHCT should therefore be considered an adjuvant therapy for treating companion animals with STS in veterinary medicine.
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