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  • Title: Clinical significance of the serum IL-2R level and Ga-67 scan findings in making a differential diagnosis between sarcoidosis and non-Hodgkin's lymphoma.
    Author: Kita T, Watanabe S, Yano F, Hayashi K, Yamamoto M, Iwasaki Y, Kosuda S.
    Journal: Ann Nucl Med; 2007 Nov; 21(9):499-503. PubMed ID: 18030581.
    Abstract:
    OBJECTIVE: To compare the serum-soluble interleukin-2 receptor (sIL-2R) levels of non-Hodgkin's lymphoma patients and active sarcoidosis patients in relation to the (67)Ga scan findings. METHODS: A total of 29 adenopathy patients suspected of having non-Hodgkin's lymphoma or sarcoidosis were enrolled in the study. All patients underwent a whole-body (67)Ga scan and single-photon emission computed tomography studies 48 h after intravenous injection of (67)Ga citrate. The sIL-2R levels were compared between the sarcoidosis patients and non-Hodgkin's lymphoma patients, the patients with and without the panda and/or lambda sign, the lymphoma patients with stage I/II disease and with stage III/IV disease, and the sarcoidosis patients and non-Hodgkin's lymphoma patients with stage III/IV disease. RESULTS: The range of the sIL-2R levels was 195-3750 U/ml in sarcoidosis and 240-62 300 U/ml in non-Hodgkin's lymphoma. The sIL-2R levels of the six non-Hodgkin's lymphoma patients with stage III/IV disease were significantly higher than those of the 15 sarcoidosis patients (P < 0.001). The sIL-2R levels of the sarcoidosis patients with the panda and/or lambda sign were significantly higher than those with neither sign (P < 0.005). The sIL-2R levels of the non-Hodgkin's lymphoma patients with stage III/IV disease were significantly higher than those of the patients with stage I/II disease (P < 0.005). CONCLUSIONS: Measurement of sIL-2R levels was sometimes useful in differentiating between sarcoidosis and stage III/IV non-Hodgkin's lymphoma, staging non-Hodgkin's lymphoma, and predicting the presence of the panda and/or lambda sign in sarcoidosis patients.
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