Erschienen in:
01.03.2014 | Original Article
Detection of skeletal muscle metastases on initial staging of lung cancer: a retrospective case series
verfasst von:
Marialuisa Bocchino, Tullio Valente, Francesco Somma, Ilaria de Rosa, Marco Bifulco, Gaetano Rea
Erschienen in:
Japanese Journal of Radiology
|
Ausgabe 3/2014
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Abstract
Purpose
Estimation of skeletal muscle metastases (SMMs) at the time of diagnosis and/or initial staging of lung cancer.
Materials and methods
Retrospective evaluation of clinical charts and imaging data suggestive of SMMs of patients with histology-proved lung cancer over a 5-year period.
Results
SMMs were identified in 46 out of 1,754 patients. Single and multiple (62.9 % of cases) SMMs were detected by total body multi-detector computed tomography (MDCT). They were associated with poorly differentiated (43 %) and advanced adenocarcinomas (52 %) without clinically relevant symptoms and/or signs. Psoas and buttock muscles were most frequently involved (33.3 %). MDCT findings consisted of well-defined homogeneously hyperdense oval masses (31 %), lesions with ring-like enhancement and central hypoattenuation (68 %), or large abscess-like necrotic lesions (24 %). Sonography revealed well-defined hypoechoic masses (41.6 %), ill-defined hypoechoic lesions (33.3 %), or anechoic areas with a necrotic centre (25 %). Positron emission tomography revealed that all SMMs were metabolically active.
Conclusions
SMMs are uncommon but not negligible in lung cancer, with an estimated prevalence of 2.62 % in our series. Although histology remains the recommended method, use of high-performance imaging techniques and increased clinical suspicion may improve their early detection. Efforts addressing their effect on the natural history of lung cancer are needed.