Dorsal Wall Ultrasound
Technique:
Real-time ultrasound examination of the dorsal wall was performed using a
high-frequency linear transducer (7–12 MHz).
Focused evaluation of the intercostal regions was performed in longitudinal
and transverse planes along the rib spaces.
Skin, subcutaneous tissue, intercostal muscles, and adjacent soft tissue
structures were assessed.
Clinical indication:
Localized chest wall 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 within the intercostal muscle plane,
in the right posterior intercostal region (between adjacent ribs),
measuring approximately 3.8 × 1.8 cm.
The lesion demonstrates homogeneous fatty echotexture with internal linear striations
oriented parallel to muscle fibers.
No surrounding edema, infiltration, or rib involvement is noted.
Fascial Planes:
Fascial layers are intact with no evidence of disruption or extension into adjacent compartments.
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 intercostal muscle.
Recommendation: Clinical correlation is advised. MRI may be considered for confirmation and evaluation of lesion extent, particularly to assess relation with adjacent ribs and pleura. Follow-up ultrasound is recommended if symptomatic or increasing 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.
End of Case Study
You have reached the end of this Intercostal Muscle Lipoma – Back Lump (Dorsal Wall Ultrasound Case Study).
This evaluation was performed using Ultrasonography (USG), allowing real-time assessment of superficial and intercostal 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
“Intercostal 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 within the
intercostal muscle plane between adjacent ribs, consistent with an
intramuscular lipoma.
On ultrasound, intercostal lipomas appear as hyperechoic lesions with homogeneous fatty echotexture
and internal linear echogenic striations parallel to muscle fibers, without surrounding edema or significant vascularity.
Careful evaluation is required to assess relationship with adjacent ribs, intercostal vessels,
and pleural structures. No features suggestive of rib involvement or pleural extension are noted in typical cases.
Ultrasonography is useful for initial assessment; however,
MRI may be considered for confirmation and evaluation of lesion extent.
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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