Schwannoma - thigh

Case contributed by Maulik S Patel
Diagnosis certain

Presentation

Complaining of proximal third of left thigh lump on the posterior-medial side for the last 6 months.

Patient Data

Age: 45 years
Gender: Female
ultrasound

There is a well-defined lesion in the region of interest.

Size                

  • craniocaudal           76 mm
  • axial                          50 mm
  • anteroposterior      36 mm

 Location         

  • possibly intermuscular plane; between adductors and semimembranosus
  • reaches up to fascia superficially
  • separate from bone

 Morphology

  • encapsulated
  • solid with cystic changes
  • hypoechoic solid areas
  • possible tiny calcification present
  • few lobulations present
  • posterior acoustic enhancement present
  • not compressible
  • echogenic fat cap is present at ends of the lesion
  • no structure identified either entering or exiting the lesion

Doppler study     

  • arterial as well as venous flow present
Photo

Intraoperative and gross specimen photos of the tumor.

Case Discussion

An adult female presented with a thigh lump for the last few months. Ultrasound shows a well-defined solid mass lesion. Surgical excision of the lesion was done. Histopathology followed by immunohistochemistry revealed the lesion being cellular schwannoma.

 

Photo courtesy: operating surgeon Dr. Firoz A. Khan. Pathology diagnosis courtesy: Dr. Pranav Desai.

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