periosteal chondroma

Periostales
Chondrom oder hoch differenziertes Chondrosarkom, histologisch nicht sicher zu entscheiden. Myxoide Komponente in der ersten Begutachtung.
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Periosteal
chondroma. Lateral view
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A giant
periosteal chondroma of the distal femur successfully reconstructed with synthetic bone grafts and a bioresorbable plate: a case report. Preoperative CT. (a) Sagittal and (b) axial scans, showing an extraskeletal mass with focal calcification on the anterior surface of the right distal femur.
wjso.biomedcentral.com • CC-by-4.0
A giant
periosteal chondroma of the distal femur successfully reconstructed with synthetic bone grafts and a bioresorbable plate: a case report. Preoperative plain radiographs. (a) Anteroposterior and (b) lateral radiographs showing cortical erosion, saucerization of the underlying cortex, and a rim of sclerosis on the anterior surface of the right distal femur.
wjso.biomedcentral.com • CC-by-4.0
Lesions
involving the outer surface of the bone in children: a pictorial review. An 11-year-old boy with juxta-cortical chondroma at the proximal right humerus. A radiograph of the left shoulder reveals mild scalloping at the medial cortex of the proximal humeral metaphysis (arrow). A coronal T2 STIR image b and a coronal T1 post-contrast image c show a soft-tissue lesion abutting the cortex with a heterogeneously high T2 signal intensity suggesting cartilage (thick arrow), and predominantly peripheral contrast enhancement (thin arrow)
insightsimaging.springeropen.com • Open Access
Periosteal
chondroma. Three-dimensional double-echo steady-state sequences: coronal
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Periosteal
chondroma. Three-dimensional double-echo steady-state sequences: axial
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Periosteal
chondroma. FAT-saturated T2-weighted sequences: axial
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Periosteal
chondroma. FAT-saturated post-gadolinium T1-weighted sequences: axial
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Periosteal
chondroma. T1-weighted image sequences: axial
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Periosteal
chondroma. T1-weighted image sequences: coronal
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Periosteal
chondroma. AP view
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Roentgenograph
showing enchondromas localized in the upper part of the humerus of a girl 7 years of age affected with Ollier disease
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A giant
periosteal chondroma of the distal femur successfully reconstructed with synthetic bone grafts and a bioresorbable plate: a case report. Preoperative MRI. (a) Sagittal and (b) axial T1-weighted images, showing a low-intensity mass on the anterior surface of the right distal femur. (c) Sagittal and (d) axial T2-weighted images, showing a high-intensity mass. No evidence of marrow invasion was seen.
wjso.biomedcentral.com • CC-by-4.0
Radiopaedia • CC-by-nc-sa 3.0 • de

Juxtacortical chondromas, also known as periosteal chondromas, are rare benign chondral tumors that arise from the periosteum of tubular bones. They are thought to account for ~2% of benign bone tumors.

Epidemiology

They tend to present around the 2 to 4 decades. There is a recognized male predilection .

Location

Typical sites include :

  • proximal humerus and distal femur (70%)
  • phalanges (25%)
  • tibia
  • radius
  • ulna

Radiographic features

Plain radiograph
  • may be seen as a saucerisation of the adjacent bony cortex with a sclerotic periosteal reaction
  • distinct soft tissue mass may be difficult to identify
  • matrix calcification may be seen in ~50% of cases; as with all chondroid lesions, this tends to be ring and arc
  • most lesions are <3 cm in size
MRI

Typically seen as a soft tissue lesion abutting the cortex and may better demonstrate evidence of pressure erosion of neighboring bone. Often has a lobulated configuration. Tends to lack associated medullary bone or soft tissue edema.

Signal characteristics include :

  • T1: typically iso to low signal relative to muscle 
  • T2/T2*: high signal but with low signal areas representing calcification
  • T1 C+ (Gd): heterogeneous and tends to show peripheral predominant contrast enhancement

Treatment and prognosis

They are benign lesions, however, may be similar in imaging and histopathologic appearance to juxtacortical chondrosarcomas. Local excision is often the treatment of choice. Once resected lesions usually do not recur.

Differential diagnosis

Imaging differential considerations include:

Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu periostales Chondrom:
Chondrom
 
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bizarre
parosteale osteochondromatöse Proliferation
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juxtakortikales
Chondrosarkom
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