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Case Reports
. 2023 Mar 10:14:86.
doi: 10.25259/SNI_141_2023. eCollection 2023.

Lumbar paraspinal intramuscular myxoma: A case report

José Hipólito-Reis  1 , Diogo Roque  1 , Joaquim Cruz Teixeira  2
Affiliations
Case Reports

Lumbar paraspinal intramuscular myxoma: A case report

José Hipólito-Reis et al. Surg Neurol Int. .

Abstract

Background: With an estimated incidence of about 1 case/million patients, paravertebral intramuscular myxomas represent a rare cause of lumbar pain. Rather, they typically occur in the heart and in bone tissues.

Case description: A 64-year-old female presented with a protracted course of nocturnal lumbar pain that radiated to the anterior aspect of the right thigh accompanied by numbness. She reported a slow-growing right paramedian lumbar mass in the previous months. The magnetic resonance (MR) showed a right lumbar paravertebral intramuscular mass at the L3 level (i.e., 70 × 50 mm) that had well-defined margins, and markedly enhanced with gadolinium. Following gross total "en bloc" tumor resection, the patient fully recovered. Pathologically, the myofibroblastic lesion proved to be an intramuscular myxoma without malignant changes.

Conclusion: A 64-year-old female presented with a slow-growing MR-documented right paramedian lumbar L3 mass responsible for proximal right-thigh numbness. Following "en bloc" gross total removal of the benign intramuscular myxoma, the patient was asymptomatic.

Keywords: Intramuscular myxoma; Lumbar pain; Paraspinal tumors.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1:
Figure 1:
Preoperative axial T1-weighted fat-suppression gadolinium-enhanced magnetic resonance imaging showing the paravertebral right lumbar intramuscular myxoma.
Figure 2:
Figure 2:
Preoperative coronal T1-weighted fat-suppression gadolinium-enhanced magnetic resonance imaging showing the lesion.
Figure 3:
Figure 3:
Macroscopic appearance of the intramuscular myxoma.
See this image and copyright information in PMC

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