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Case Reports
. 2013 Oct-Dec;3(4):38-41.
doi: 10.13107/jocr.2250-0685.130.

Intramuscular Myxoma - A Rare Tumor

Vishwanath Yaligod  1 , Ajoy S M  1
Affiliations
Case Reports

Intramuscular Myxoma - A Rare Tumor

Vishwanath Yaligod et al. J Orthop Case Rep. 2013 Oct-Dec.

Abstract

Introduction: Intramuscular myxoma is a rare benign soft tissue tumor involving the musculoskeletal system. The incidence is reported as varying from 0.1 to 0.13 per 100,000 population. Most patients present between the fifth and sixth decade of life. The swelling commonly occurs in the large muscles of the thigh, shoulder, buttocks and arms. The tumor can be diagnosed with certainty only with histopathological examination. Local recurrence is rare after excision.

Case report: A 73 year old male patient presented to us with a swelling of the anterior aspect of the middle third of the right thigh measuring about 8 × 4 centimeters. He was thoroughly investigated and the swelling excised in toto. The soft cystic swelling excised was found on histopathology to be an intramuscular myxoma.

Conclusion: This case report is being presented since the tumor is rare and also an important consideration in the differential diagnosis of sarcomas, intramuscular lipoma, hemangioma, hematoma, and desmoid tumor. Another important feature is that it can be diagnosed with certainty only after excision.

Keywords: Intramuscular myxoma; benign; soft tissue swelling.

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Conflict of interest statement

Conflict of Interest: Nil

Figures

Figure 1
Figure 1
Clinical photograph showing swelling in right middle thigh
Figure 2
Figure 2
MRI Scan showing the lesion in sagittal plane in T2 weighted image
Figure 3
Figure 3
Axial section of lesion in T1 weighted image showing intramuscular location and proximity to vessels
Figure 4
Figure 4
PET CT image showing benign isolated lesion
Figure 5
Figure 5
Intraoperative picture demonstrating the intramuscular location and muscle fibres blending into the capsule.
Figure 6
Figure 6
Macroscopic picture of the lesion showing glistening white capsule.
Figure 7
Figure 7
Histopathological image revealing capsule formed by muscle fibres and mucoid tissue within.
Figure 8
Figure 8
Histopathological image revealing abundant myxoid tissue and hypo cellularity.
See this image and copyright information in PMC

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