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:
Back swelling / Pain / Palpable lump / Suspected intramuscular lesion.
Skin & Subcutaneous Tissue: Skin thickness appears normal. Subcutaneous tissue shows normal echotexture with no edema, collection, or focal lesion. Muscle Layers: A well-defined hyperechoic lesion is seen in the lateral lumbar region within the quadratus lumborum muscle, measuring approximately 4.5 × 2.2 cm. The lesion demonstrates homogeneous fatty echotexture with internal linear striations oriented parallel to muscle fibers. No surrounding edema, infiltration, or architectural distortion is noted. Fascial Planes: Fascial layers are intact with no evidence of disruption or deep extension. Soft Tissue: No additional focal soft tissue mass, cystic lesion, or collection is seen. Vascularity: No internal vascularity is observed on Doppler evaluation.
Impression: Features are suggestive of an intramuscular lipoma in the quadratus lumborum muscle.
Recommendation: Clinical correlation is advised. MRI may be considered for confirmation and assessment of lesion extent. Follow-up ultrasound is recommended if symptomatic or increasing in size.
Kindly Note:
• Kindly report any typographical errors and submit for correction within 7 days.
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.
End of Case Study
You have reached the end of this Quadratus Lumborum Muscle Lipoma – Back Lump (Dorsal Wall Ultrasound Case Study).
This evaluation was performed using Ultrasonography (USG), allowing real-time assessment of superficial and deep intramuscular soft tissue structures.
Content is intended for educational, training, and clinical reference only.
Declaration:
I, R. K. Mouj, declare that the material presented in this case study titled
“Quadratus Lumborum Muscle Lipoma – Dorsal Wall (Back Lump) on Ultrasonography (USG)”
has been prepared solely for educational and academic purposes.
The findings demonstrate a well-defined hyperechoic lesion located in the
lateral lumbar region within the quadratus lumborum muscle, consistent with an
intramuscular lipoma.
On ultrasound, intramuscular lipomas typically appear as hyperechoic lesions
with homogeneous fatty echotexture and internal linear echogenic striations
oriented parallel to muscle fibers, without surrounding edema or significant vascularity.
Ultrasonography is useful for identifying deep-seated intramuscular fatty lesions;
however, MRI may be considered for confirmation and evaluation of lesion extent,
especially in deeper muscle compartments.
These findings are intended for learning and demonstration only.
Definitive diagnosis and management require clinical correlation and appropriate medical consultation.
Author: ____________________
Name: R. K. Mouj [Radio-imaging Technologist]
Domain: Diagnostic Sonography & Soft Tissue Imaging
Modality: Ultrasonography (USG)
Platform: SonoAcademy
Supervisor / Guide: Department Radiologist
Department: Radiology
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