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
Skin & Subcutaneous Tissue:
Right lateral dorsal wall, involving subcutaneous / possible intramuscular plane.
A well-defined heterogeneous predominantly hyperechoic lesion is seen measuring
approximately 6.0 × 3.5 cm. The lesion demonstrates internal vascularity on
Doppler imaging. Echotexture appears relatively heterogeneous compared to a
typical lipoma.
No evidence of surrounding infiltration or extension into adjacent deeper structures.
Muscle Layers:
Visualized muscle planes appear normal in bulk and echotexture.
No focal intramuscular mass, tear, or collection is identified.
Fascial Planes:
Fascial layers are intact with no evidence of disruption or fluid tracking.
Soft Tissue:
No additional focal soft tissue mass, cystic lesion, or abscess is identified.
Vascularity:
The lesion shows increased internal vascularity on Doppler evaluation.
No abnormal surrounding vascularity is noted.
Impression: A well-defined heterogeneous predominantly hyperechoic soft tissue lesion is noted in the subcutaneous / intramuscular plane, demonstrating internal septations and increased internal vascularity on Doppler evaluation. No evidence of calcification, necrosis, or deep fascial/muscular invasion. Findings are suggestive of Hibernoma (benign brown fat tumor).
Recommendation: Clinical correlation is advised. MRI is recommended for further characterization and to assess lesion extent. Histopathological confirmation may be considered if clinically indicated to exclude other vascular soft tissue tumors.
Kindly Note:
Limitations / Technical Factors:
Ultrasound evaluation has limitations in assessing deep-seated lesions and
characterization of soft tissue tumors.
MRI / CT correlation 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 Hibernoma – Back Lump (Dorsal Wall Ultrasound Case Study).
This evaluation was performed using Ultrasonography (USG), allowing real-time assessment of superficial 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
“Hibernoma – Dorsal Wall (Back Lump) on Ultrasonography (USG)”
has been prepared solely for educational and academic purposes.
The findings demonstrate a well-defined soft tissue lesion located in the
subcutaneous or intramuscular plane of the dorsal wall, showing
heterogeneous echotexture with internal vascularity, consistent with a hibernoma.
Hibernoma is a rare benign tumor arising from brown fat.
On ultrasound, it typically appears as a hyperechoic to heterogeneous lesion
with internal vascular channels, distinguishing it from simple lipoma.
Due to its vascular nature, careful Doppler evaluation is essential.
MRI is often recommended for further characterization, and
histopathological confirmation is required for definitive diagnosis.
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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