Endocrinology and Metabolism

Original Article

Diabetes, Obesity and Metabolism
Reference Values for Skeletal Muscle Mass at the Third Lumbar Vertebral Level Measured by Computed Tomography in a Healthy Korean Population: Ja Kyung Yoon, Sunyoung Lee, Kyoung Won Kim, Ji Eun Lee, Jeong Ah Hwang, Taeyong Park, Jeongjin Lee; Endocrinol Metab. 2021;36(3):672-677. Published online June 8, 2021; DOI: https://doi.org/10.3803/EnM.2021.1041

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Background
Sarcopenia is defined as the loss of skeletal muscle mass and is associated with negative clinical outcomes. This study aimed to establish sex-specific cutoff values for the skeletal muscle area (SMA) and skeletal muscle index (SMI) at the third lumbar vertebral (L3) level using computed tomography (CT) imaging to identify sarcopenia in healthy Korean liver donors.
Methods
This retrospective study included 659 healthy liver donors (408 men and 251 women) aged 20 to 60 years who had undergone abdominal CT examinations between January 2017 and December 2018. Assessment of body composition was performed with an automated segmentation technique using a deep-learning system. Sex-specific SMA and SMI distributions were assessed, and cutoff values for determining sarcopenia were defined as values at either two standard deviations (SDs) below the mean reference value or below the fifth percentile.
Results
Using the SD definition, cutoff values for SMA and SMI were 117.04 cm² and 39.33 cm²/m², respectively, in men and 71.39 cm² and 27.77 cm²/m², respectively, in women. Using the fifth percentile definition, cutoff values for SMA and SMI were 126.88 cm² and 40.96 cm²/m², respectively, in men and 78.85 cm² and 30.60 cm²/m², respectively, in women.
Conclusion
Our data provide sex-specific cutoff values for the SMA and SMI at the L3 level measured by CT imaging in a healthy Korean population, which may be applicable for identifying sarcopenia in this population.

Citations

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Review Articles

Thyroid
Percutaneous Adrenal Radiofrequency Ablation: A Short Review for Endocrinologists: Byung Kwan Park; Endocrinol Metab. 2020;35(4):750-755. Published online December 2, 2020; DOI: https://doi.org/10.3803/EnM.2020.880

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127 Download
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Abstract PDF PubReader ePub

Image-guided radiofrequency ablation (RFA) has been accepted as a minimally invasive treatment for adrenal tumors in patients who are unable to undergo adrenalectomy. Accordingly, this treatment has become more readily available for treating functioning or non-functioning adrenal masses. Thus, endocrinologists need a better understanding of percutaneous RFA of adrenal tumors. The purpose of this review is to briefly describe the basic mechanism of RFA, indications and contraindications, patient preparation prior to RFA, type of complications, how to avoid complications, RFA procedures, and treatment outcomes.

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Adrenal gland
Differential Diagnosis of Adrenal Mass Using Imaging Modality: Special Emphasis on F-18 Fluoro-2-Deoxy-D-Glucose Positron Emission Tomography/Computed Tomography: Hong Je Lee, Jaetae Lee; Endocrinol Metab. 2014;29(1):5-11. Published online March 14, 2014; DOI: https://doi.org/10.3803/EnM.2014.29.1.5

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30 Download
7 Web of Science
6 Crossref

Abstract PDF PubReader

Adrenal incidentalomas are adrenal masses serendipitously detected during an imaging study performed for reasons unrelated to suspicion of adrenal disease. The incidence of adrenal incidentalomas has increased because of the widespread use of various imaging modalities. In oncology patients with adrenal incidentalomas, the characterization of the adrenal masses is challenging because nearly 50% of incidental adrenal masses are metastatic lesions that need special medical attention. Although unenhanced computed tomography (CT) densitometry, chemical shift magnetic resonance imaging (MRI), delayed contrast-enhanced CT and CT histogram analysis have been used as sensitive and specific modalities for differentiating benign from malignant adrenal masses, F-18 fluoro-2-deoxy-D-glucose positron emission tomography (F-18 FDG PET)/CT is a highly accurate imaging modality compared to CT or MRI, especially when these two imaging modalities are combined. In addition, a semiquantitative analysis using standardized uptake value ratio further improves the diagnostic accuracy of F-18 FDG PET/CT in differentiating benign from malignant adrenal masses. Thus, F-18 FDG PET/CT is very helpful for determining the best therapeutic management, especially for assessing the need for surgery.

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