Myoepithelial carcinoma of tibia mimic giant cell tumor: a case report with emphasis on MR features

Lin, Chu-Chuan; Wu, Kunyu; Chen, Clement Kuen-Huang; Li, Chien‐Feng; Hsieh, Tsyh-Jyi

doi:10.1007/s00256-019-03198-w

Cited by 4 publications

(6 citation statements)

References 18 publications

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“…In our case, the mass showed hypersignal intensity on the T2-weighted image and intermediate signal intensity on the T1-weighted image; these results appear to be similar to a previous report. On DWI, our patient showed diffusion restriction; although little is known, this finding is consistent with the results of a previous study (14). According to the literature, myoepithelial carcinoma of the tibia shows restricted diffusion, reflecting a large cellular microenvironment on DW-MRI with a low ADC.…”

Section: Discussionsupporting

confidence: 91%

Subcutaneous Myoepithelial Carcinoma of the Ankle

2023

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Introduction: Myoepithelial carcinomas are rare malignant neoplasms, which are known to arise from the salivary glands or other organs. Case Presentation: Here, we present a case of myoepithelial carcinoma in a 64-year-old woman, presenting to a clinic with a painful ankle mass for the past three years. Ultrasonography showed a 1 cm, iso- to hypoechoic mass on the medial malleolus of the right ankle. Magnetic resonance imaging (MRI) revealed a well-defined mass with iso-signal intensity on T1-weighted images and high signal intensity on T2-weighted images. On the enhanced image, the mass showed homogenous enhancement. In diffusion-weighted images with a high b-value, the lesion showed restriction with a low apparent diffusion coefficient (ADC). Surgical removal was performed, and pathological analysis revealed myoepithelial carcinoma. Conclusion: Myoepithelial carcinoma of the extrasalivary glands is a very uncommon phenomenon. Despite its rarity, it should be considered as a differential diagnosis when a soft tissue mass of the ankle shows malignant potential in radiological findings.

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Section: Discussionsupporting

confidence: 91%

Subcutaneous Myoepithelial Carcinoma of the Ankle

2023

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“…Linghong Guo et al reported myoepithelioma of the abdominal wall with moderately restricted diffusion [5] . In contrast, DW-MRIs showed hyperintensity, and the ADC map showed hypointensity in myoepithelial carcinoma of the tibia [13] . In a previous report, the myoepithelial carcinoma of the salivary gland had a mean ADC value of 1.35 × 10 −3 mm 2 /s, because of which the tumor was classified as malignant [9] .…”

Section: Discussionmentioning

confidence: 81%

“…In contrast, the tumor demonstrated rapid and gradual enhancement and a contrast peak in less than 120 seconds on DCE-MRI in a patient with MM of a submandibular salivary gland [9] . In addition, the dynamic enhancement curve in patients with tibial MM showed early wash-in and early wash-out; this pattern is common in both malignant tumors and aggressive lesions such as giant cell tumors of the bone, on DCE-MR images [13] . In the present case report, the sacral MM showed gradual and heterogeneous contrast enhancement in regions corresponding to the solid parts and septum within the tumor.…”

Section: Discussionmentioning

confidence: 81%

“…In general, DW-MRI can delineate malignant lesions as a hyperintense area with excellent tissue contrast, and cases with low SI on DW-MRI can be considered as benign lesions [14] , [15] , [16] . A few previous papers have reported the DW-MRI feature and ADC value of MTs [5 , 9 , 13] . Linghong Guo et al reported myoepithelioma of the abdominal wall with moderately restricted diffusion [5] .…”

Section: Discussionmentioning

confidence: 99%

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MRI and CT features of a malignant myoepithelioma of the scrotum: A case report and literature review

Shinya

Kojima

Monobe

et al. 2021

Radiology Case Reports

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Malignant myoepithelioma of the scrotum is extremely rare. We report the case of a 51-year-old man with malignant myoepithelioma of the scrotum, wherein computed tomography and magnetic resonance imaging revealed a lobulated soft tissue mass with calcification, cystic component, and solid component with gradual contrast enhancement on dynamic contrast-enhanced scans. The patient presented with scrotal induration, and there was no elevation of tumor markers and no evidence of a metastatic lesion on computed tomography and magnetic resonance imaging. Histopathological examination of the resected scrotal specimen confirmed a well-circumscribed solid tumor with septa, a small area of hemorrhage, and necrosis. The subsequent diagnosis was malignant myoepithelioma of the scrotum. This case shows that scrotal malignant myoepithelioma might appear as a well-defined lobulated mass with cystic regions. We conjecture that the enhancement pattern and apparent diffusion coefficient values can be potential markers for scrotal myoepithelial tumors.

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“…MRI revealed lobulated tumors with heterogeneous high SI on T2WIs in patients with myoepithelial carcinomas in the nasopharynx, right rhinopharynx, and left submandibular region [ 2 , 3 , 11 ]. In myoepithelial carcinoma of the soft tissue and bone, DWI shows high intensities and low ADC values [ 12 , 13 ]. However, DWI and ADC values for head and neck myoepithelial carcinoma have not been previously reported.…”

Section: Discussionmentioning

confidence: 99%