Chronic expanding hematoma with a significantly high fluorodeoxyglucose uptake on 18F-fluorodeoxyglucose positron emission tomography, mimicking a malignant soft tissue tumor: A case report

被引：15

作者：

Nishida Y. ^{[1
,2
]}

Kobayashi E. ^{[1
]}

Kubota D. ^{[1
]}

Setsu N. ^{[1
]}

Ogura K. ^{[1
]}

Tanzawa Y. ^{[1
]}

Nakatani F. ^{[1
]}

Kato Y. ^{[2
]}

Chuman H. ^{[1
]}

Kawai A. ^{[1
]}

机构：

[1] Department of Musculoskeletal Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo

[2] Department of Orthopaedic Surgery, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo

来源：

Journal of Medical Case Reports | / 8卷 / 1期

基金：

日本学术振兴会;

关键词：

Chronic expanding hematoma; FDG-PET; Soft tissue sarcoma;

D O I：

10.1186/1752-1947-8-349

中图分类号：

学科分类号：

摘要：

Introduction: Chronic expanding hematoma is a rare persistent hematoma that can sometimes be misdiagnosed as a malignant tumor due to its clinical and radiological features. Case presentation: A 42-year-old Japanese man with a large mass in his leg, suggestive of malignancy, presented to our hospital. He had been aware of the leg swelling for the last eight years. A magnetic resonance imaging scan demonstrated a large mass with two components. One was a large, well-defined cystic mass (13×9cm) showing high intensity on T1-and T2-weighted images, and the other was a solid mass (3.5×2.5cm, adjacent to the large mass) with high intensity on T1-weighted images. Two-[18F]fluoro-2 deoxy-D glucose positron emission tomography images revealed increased uptake with a maximum standardized uptake value of 15.8 in the solid mass. As these findings were considered suggestive of hematoma associated with a malignant lesion, an open biopsy was performed. A pathological examination demonstrated a hematoma with xanthogranuloma, and no malignant cells were evident. Therefore, we resected the tumor including both components, and the histological diagnosis was chronic expanding hematoma. Clinical diagnosis based on 2-[18F]fluoro-2 deoxy-D glucose uptake is sometimes limited by the fact that 2-[18F]fluoro-2 deoxy-D glucose is taken up by not only malignant tumor cells but also macrophages and tissues with granulation or inflammation. Conclusions: Significantly increased standardized uptake value in the peripheral rim of the lesion on 2-[18F]fluoro-2 deoxy-D glucose positron emission tomography imaging, mimicking a soft tissue sarcoma, should be recognized as a potential diagnostic pitfall in cases of chronic expanding hematoma. © 2014 Al-Kandari et al.; licensee BioMed Central Ltd.

引用

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