Diagnostic value of ultrasonography and other imaging examinations in patients with intramuscular myxoma: A case series and literature review

Shi, Jiahong; Dai, Tao; Yang, Ran; Sun, Zhixia

doi:10.1016/j.clinimag.2020.06.027

Cited by 7 publications

(8 citation statements)

References 35 publications

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“…This lesion is seen in T1-weighted images as an ovoid-shaped mass with low signal intensity and in T2weighted images as high signal intensity. In the present case, a hyperintense egg-shaped mass was observed in T2-weighted sections inside the supinator muscle (10). Adamonis et al (2019) also reported the presence of IMM in the deltoid muscle in a 34-year-old man, whose tumor lesion was observed in T2-weighted images with hyperintense appearance.…”

Section: Discussionsupporting

confidence: 66%

Rare forearm intramuscular myxoma: a case report

Pirmohamadi

Begloo

Rahimi

et al. 2023

Preprint

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Section: Discussionsupporting

confidence: 66%

Rare forearm intramuscular myxoma: a case report

Pirmohamadi

Begloo

Rahimi

et al. 2023

Preprint

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“…It is likely that without the patient’s unique skill set and expertise as a PT this growth would have gone unnoticed until her gait was severely compromised. Intramuscular myxomas are typically found in large skeletal muscles, with the long axis of the mass aligned with the muscle fibers (Shi et al, 2020). However, they have also been found in the face and neck (Nisi et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Intramuscular myxomas are detected more frequently in females. Intramuscular myxomas are characterized by hypocellularity, hypovascularity, and undifferentiated stellate cells (Luna et al, 2005; Nielsen et al, 1998; Shi et al, 2020). Due to their rarity, intramuscular myxomas are difficult to diagnose and final diagnosis can only be made with histological verification.…”

Section: Discussionmentioning

confidence: 99%

Unexplained Gait and Balance Changes: A Case Report of Myxoma Mitigation in a Breast Reduction Patient

Clements¹,

Gallagher

Herrmann³

2022

Workplace Health Saf

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In Fall 2020, a female physical therapist (PT) developed mild changes in gait, infrapatellar tendon pain, and lateral patellar tracking. As a PT in good physical condition, she did not access her employer’s occupational health clinic but instead she self-treated. Two months after symptom onset and self-treatment, she was diagnosed with an intramuscular myxoma within her left vastus lateralis, the largest muscle within the quadricep. The employee was at risk of slips, trips, and falls as the mass grew. Due to the location and increasing size of the mass, the employee required surgical treatment. Healthcare workers, particularly those who provide treatment, are likely to self-treat rather than seek assistance from the occupational health professional. The employee was seen by a plastic surgeon for an unrelated medical condition which is when the myxoma was diagnosed. Further delay may have led to occupational injury associated with the balance and gait disturbances. Opportunity exists for the occupational health professional to provide a review of services, including screening for musculoskeletal changes associated with occupational injury such as those described herein. This is especially important among those healthcare workers who tend to self-treat.

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“…Diagnosing intramuscular myxomas with imaging presents some challenges given their rarity [ 1 ]. Intramuscular myxomas typically present as well-defined ovoid heterogenous hypoechoic masses with some internal echoes and absent internal vascularity on ultrasound [ 2 , 17 ]. MRI usually demonstrates a homogenous mass with low to intermediate signal intensity relative to surrounding muscle on T1-weighted images or a high signal intensity on T2-weighted images [ 5 , 7 , 17 , 18 ].…”

Section: Discussionmentioning

confidence: 99%

“…Intramuscular myxomas typically present as well-defined ovoid heterogenous hypoechoic masses with some internal echoes and absent internal vascularity on ultrasound [ 2 , 17 ]. MRI usually demonstrates a homogenous mass with low to intermediate signal intensity relative to surrounding muscle on T1-weighted images or a high signal intensity on T2-weighted images [ 5 , 7 , 17 , 18 ]. CT scans typically show a well-defined homogenous soft-tissue mass with lower attenuation compared to surrounding muscle [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

A 73-Year-Old Man with an Incidental Diagnosis of Deltoid Intramuscular Myxoma Following a History of Trauma

et al. 2022

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Patient: Male, 73-year-old Final Diagnosis: Intramuscular myxoma Symptoms: Shoulder pain Medication:— Clinical Procedure: — Specialty: General and Internal Medicine • Orthopedics and Traumatology Objective: Rare disease Background: Intramuscular myxomas are rare and benign soft-tissue tumors of uncertain differentiation. Predisposing or precipitating factors have not yet been reported. Activating mutation in GNAS (exons 8 and 9) is detected in >90% of sporadic cases. The role of chronic myopathy, tendinopathy, or trauma to muscles in the etiology of these neoplasms is not known. We report an unusual case of a deltoid mass found following longstanding rotator cuff tendinopathy and a recent fall, later confirmed to be an intramuscular myxoma on biopsy. Case Report: A 73-year-old man with a 5-year history of left shoulder pain and rotator cuff tear presented with intractable pain in his left shoulder after a recent fall at home. Physical examination was suggestive of a rotator cuff injury and magnetic resonance imaging (MRI) of the left shoulder revealed a 2.7×2.5×3.7cm T1 hypo- and T2 hyperin-tense oblong mass-like signal abnormality with heterogeneous, predominantly peripheral enhancement within the deltoid muscle concerning for a malignant mass. Surgical resection was carried out along with left reverse total shoulder replacement, and histopathology revealed findings consistent with an intramuscular myxoma. Conclusions: Intramuscular myxomas are rare, benign tumors. This case report presents one such myxoma incidentally found in a patient with longstanding rotator cuff tendinopathy and a recent fall. Although this co-occurrence is likely incidental, further research and case series review of similar presentations may influence postulations of the pathophysiology of myxomas.

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Diagnostic value of ultrasonography and other imaging examinations in patients with intramuscular myxoma: A case series and literature review

Cited by 7 publications

References 35 publications

Rare forearm intramuscular myxoma: a case report

Rare forearm intramuscular myxoma: a case report

Unexplained Gait and Balance Changes: A Case Report of Myxoma Mitigation in a Breast Reduction Patient

A 73-Year-Old Man with an Incidental Diagnosis of Deltoid Intramuscular Myxoma Following a History of Trauma

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