Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur
MRI scans of patients who have undergone leg amputation are rarely obtained; such scans may be performed when a mass is suspected to be related to the amputation or when inflammation (infection) is suspected, but the number of such cases is not large. In this study, however, we encountered 2 very st...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Radiology Case Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1930043322007750 |
| _version_ | 1797990826796646400 |
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| author | Masafumi Sakai, MD Hirotaka Mutsuzaki, MD Yukiyo Shimizu, MD Yoshikazu Okamoto, MD Takahito Nakajima, PhD |
| author_facet | Masafumi Sakai, MD Hirotaka Mutsuzaki, MD Yukiyo Shimizu, MD Yoshikazu Okamoto, MD Takahito Nakajima, PhD |
| author_sort | Masafumi Sakai, MD |
| collection | DOAJ |
| description | MRI scans of patients who have undergone leg amputation are rarely obtained; such scans may be performed when a mass is suspected to be related to the amputation or when inflammation (infection) is suspected, but the number of such cases is not large. In this study, however, we encountered 2 very striking cases in which short-tau inversion recovery coronal images taken for different purposes coincidentally showed a diffuse high signal intensity of the residual femoral cortex on the side wearing the artificial limb. Further examination of these images revealed that the superior margins of the artificial limb cup and the abnormal signal were almost identical and that the signal was only observed in the residual femur of the side using the artificial limb, suggesting that the change was caused by artificial limb usage. Despite the difficulty in imaging-pathologic correlation because the patients were still alive, we considered that the high signal was related to the characteristic microanatomy of the bone cortex and the mechanical changes caused by the effects of artificial limb usage on the residual femur. The 2 patients have not shown any specific events since then. Thus, while the residual femoral cortex may show findings of interest, these findings do not seem to require any specific treatment. |
| first_indexed | 2024-04-11T08:42:37Z |
| format | Article |
| id | doaj.art-f2f49fd879b54ad79e3a95493a4ebffc |
| institution | Directory Open Access Journal |
| issn | 1930-0433 |
| language | English |
| last_indexed | 2024-04-11T08:42:37Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Radiology Case Reports |
| spelling | doaj.art-f2f49fd879b54ad79e3a95493a4ebffc2022-12-22T04:34:11ZengElsevierRadiology Case Reports1930-04332022-12-01171248744878Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femurMasafumi Sakai, MD0Hirotaka Mutsuzaki, MD1Yukiyo Shimizu, MD2Yoshikazu Okamoto, MD3Takahito Nakajima, PhD4Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki 305-8576, JapanDepartment of Orthopaedic Surgery, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Inashiki District, Ibaraki 300-0394, JapanDepartment of Rehabilitation Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki 305-8576, JapanDepartment of Diagnostic and Interventional Radiology, Faculty of Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki 305-8576, Japan; Corresponding author.Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki 305-8576, JapanMRI scans of patients who have undergone leg amputation are rarely obtained; such scans may be performed when a mass is suspected to be related to the amputation or when inflammation (infection) is suspected, but the number of such cases is not large. In this study, however, we encountered 2 very striking cases in which short-tau inversion recovery coronal images taken for different purposes coincidentally showed a diffuse high signal intensity of the residual femoral cortex on the side wearing the artificial limb. Further examination of these images revealed that the superior margins of the artificial limb cup and the abnormal signal were almost identical and that the signal was only observed in the residual femur of the side using the artificial limb, suggesting that the change was caused by artificial limb usage. Despite the difficulty in imaging-pathologic correlation because the patients were still alive, we considered that the high signal was related to the characteristic microanatomy of the bone cortex and the mechanical changes caused by the effects of artificial limb usage on the residual femur. The 2 patients have not shown any specific events since then. Thus, while the residual femoral cortex may show findings of interest, these findings do not seem to require any specific treatment.http://www.sciencedirect.com/science/article/pii/S1930043322007750AmputationMRIArtificial limbCortexCongestion |
| spellingShingle | Masafumi Sakai, MD Hirotaka Mutsuzaki, MD Yukiyo Shimizu, MD Yoshikazu Okamoto, MD Takahito Nakajima, PhD Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur Radiology Case Reports Amputation MRI Artificial limb Cortex Congestion |
| title | Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| title_full | Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| title_fullStr | Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| title_full_unstemmed | Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| title_short | Two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| title_sort | two case reports showing a rather striking abnormal finding of unknown origin localized to the cortex of an amputated femur |
| topic | Amputation MRI Artificial limb Cortex Congestion |
| url | http://www.sciencedirect.com/science/article/pii/S1930043322007750 |
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