EURORAD ESR

Case 12935

Fibrosseous pseudotumour of the digit (FOPD): non-calcified radiologic appearance

Author(s)
Mirko TRENTADUE, MD*; Claudia CASTELLI, MD^; Matteo BRUNELLI, MD, PhD^; Roberto POZZI MUCELLI, MD*

* Department of Radiology, University of Verona
University Hospital Policlinic G. B. Rossi
P. le Ludovico A. Scuro, 10 - 37134 – Verona – Italy

^ Department of Pathology and Diagnostics, University of Verona
University Hospital Policlinic G. B. Rossi
P. le Ludovico A. Scuro, 10 - 37134 – Verona – Italy
 
Patient
female, 22 year(s)
 
 
  • Figure 1
    Non-enhanced MDCT

    Volume-rendering reconstruction of the right hand of our patient.

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Soft tissues / Skin; Imaging Technique: CT; Procedure: Computer Applications-3D; Special Focus: Pathology;
     
     
  • Figure 2
    Plain films

    (a-c). A swelling is recognizable on the radial aspect of the fourth finger (arrows) without evidence of bone abnormalities. Note the absence of calcifications inside the swelling.

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Soft tissues / Skin; Imaging Technique: Digital radiography; Plain radiographic studies; Procedure: Diagnostic procedure; Special Focus: Pathology;
     
     
  • Figure 3
    Non-enhanced MDCT

    Axial and sagittal, soft tissue (a,b); coronal, bone window (c): 25 mm well-defined soft tissue mass, slightly hyperdense (~34 HU), hypodense to muscles. No air bubbles or calcifications inside. No bone abnormalities...

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Soft tissues / Skin; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Pathology;
     
     
  • Figure 4
    MRI

    T1w (a,d,e - FS: a,e): 30 mm iso/hypointense nodule. STIR (b,f): hyperintense, thin-walled. Gd+ (c,g): strong "rim-like" enhancement (arrowheads, g). Tendon displacement (arrows, a,b,c). Normal bone.

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Soft tissues / Skin; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Pathology;
     
     
  • Figure 5
    Histopathological examination

    (a,b) Fibromyxoid matrix (arrowheads), foci of osseous differentiation (arrows). (c, d) Mesenchyma with osseous trabeculae (arrows) rimmed by osteoblasts and osteoclast-like cells (arrowheads). Spindle cells (dotted...

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: Experimental; Procedure: Diagnostic procedure; Special Focus: Pathology;
     
     
  • Figure 6
    Table 1 - FOPD imaging findings

    Tab. 1 - FOPD imaging features.

     
    Area of Interest: Extremities; Musculoskeletal soft tissue; Soft tissues / Skin; Imaging Technique: CT; MR; Plain radiographic studies; Procedure: Diagnostic procedure; Special Focus: Pathology;
     
     
Volume-rendering reconstruction of the right hand of our patient.
 
(a-c). A swelling is recognizable on the radial aspect of the fourth finger (arrows) without evidence of bone abnormalities. Note the absence of calcifications inside the swelling.
 
Axial and sagittal, soft tissue (a,b); coronal, bone window (c): 25 mm well-defined soft tissue mass, slightly hyperdense (~34 HU), hypodense to muscles. No air bubbles or calcifications inside. No bone abnormalities (arrowheads).
 
T1w (a,d,e - FS: a,e): 30 mm iso/hypointense nodule. STIR (b,f): hyperintense, thin-walled. Gd+ (c,g): strong "rim-like" enhancement (arrowheads, g). Tendon displacement (arrows, a,b,c). Normal bone.
 
(a,b) Fibromyxoid matrix (arrowheads), foci of osseous differentiation (arrows). (c, d) Mesenchyma with osseous trabeculae (arrows) rimmed by osteoblasts and osteoclast-like cells (arrowheads). Spindle cells (dotted arrows) in a myxoid stroma.
 
Tab. 1 - FOPD imaging features.
 
 
 
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