Trapezius Muscle Lipoma Back lump ultrasound – dorsal wall lesions

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Trapezius Muscle Lipoma Back lump ultrasound – dorsal wall lesions
Case Study No: R-17

Dorsal Wall Ultrasound


Technique: Real-time ultrasound examination of the dorsal wall was performed using a high-frequency linear transducer (7–12 MHz). Systematic evaluation of the posterior thoraco-lumbar region was carried out in longitudinal and transverse planes. Skin, subcutaneous tissue, muscle layers, and underlying soft tissue structures were assessed.
Clinical indication: Suspected soft tissue lesion


Skin & Subcutaneous Tissue: Skin thickness appears normal. Subcutaneous tissue shows normal echotexture with no edema or collection.

Muscle Layers: A well-defined hyperechoic lesion is noted within the trapezius muscle plane, measuring approximately 4.8 × 2.3 cm. The lesion demonstrates linear echogenic striations aligned parallel to muscle fibers. No surrounding infiltration or muscle disruption is seen.
Fascial Planes: Fascial layers are intact with no evidence of fluid tracking or disruption. Soft Tissue: No additional focal soft tissue mass, cystic lesion, or abscess is seen. Vascularity: No internal vascularity is noted within the lesion on Doppler evaluation.


Impression: Well-defined intramuscular hyperechoic lesion within the trapezius muscle, showing characteristic sonographic features of a lipoma.
Features are suggestive of intramuscular (trapezius muscle) lipoma.

Recommendation: Clinical correlation is advised. MRI may be considered for further characterization and confirmation. Follow-up is recommended if the lesion is symptomatic or shows interval increase in size.


Kindly Note:

Limitations / Technical Factors:
Ultrasound evaluation is limited for deep-seated lesions and bony structures.
Clinical correlation and further imaging (MRI / CT) may be required depending on clinical suspicion.
• This report is not valid for medico-legal purposes.

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