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Interact CardioVasc Thorac Surg 2009;9:70-73. doi:10.1510/icvts.2009.202580
© 2009 European Association of Cardio-Thoracic Surgery
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Noritaka Isowa
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Institutional report - Thoracic oncologic

The maximum standardized uptake values on positron emission tomography to predict the Noguchi classification and invasiveness in clinical stage IA adenocarcinoma measuring 2 cm or less in size

Ryo Maedaa,*, Noritaka Isowaa, Hideyuki Onumab, Hiroshi Miurab, Tomoya Haradac, Hirokazu Tougec, Hirokazu Tokuyasuc and Yuji Kawasakic

a Division of Thoracic Surgery, Matsue Red Cross Hospital, 200 Horomachi, Matsue, Shimane 690-8506, Japan
b Division of Pathology, Matsue Red Cross Hospital, Shimane, Japan
c Division of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan

*Corresponding author. Tel.: +81-852-24-2111; fax: +81-852-31-9783.

E-mail address: ryomaedamatsue{at}yahoo.co.jp (R. Maeda).

This study investigated whether the standardized uptake value (SUV) of the tumor correlated with the Noguchi classification and tumor invasiveness in patients with clinical stage IA adenocarcinoma ≤2 cm in size. Fifty-four patients that underwent a curative surgical resection for clinical stage IA adenocarcinoma ≤2 cm from April 2005 to December 2008 had integrated positron emission tomography (PET) – computed tomography (CT) with 18F-fluorodeoxyglucose (FDG) as part of the preoperative workup. The relationships between the maximum SUV (SUVmax) and Noguchi classification, pathological results of intratumoral lymphatic or vascular invasion of tumor cells, and pleural invasion were examined. In comparison to tumors with an SUVmax>1.0, tumors with an SUVmax≤1.0 were more frequently classified as Noguchi type A or B (P<0.0001). Tumors with an SUVmax>1.0 had more intratumoral lymphatic or vascular invasion of tumor cells and pleural invasion (P=0.0005 and P=0.0002). These results suggest that an SUVmax is an important predictor for the Noguchi classification and tumor invasiveness in patients with clinical stage IA adenocarcinoma ≤2 cm in size.

Key Words: Adenocarcinoma; FDG-PET; SUV; Thoracic surgery; Noguchi classification

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