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Temporal bone chondroblastoma: Imaging characteristics with pathologic correlation.

Sun-Won Park1,2, Ji-Hoon Kim3, Ji Hoon Park4

  • 1Department of Radiology, Seoul Metropolitan Government - Seoul National University, Boramae Medical Center, Seoul, Korea.

Head & Neck
|July 25, 2017
PubMed
Summary
This summary is machine-generated.

Imaging features of temporal bone chondroblastoma were elucidated. This rare tumor often presents as a heterogeneous, hypermetabolic mass with calcifications, typically showing low signal intensity on T2-weighted imaging.

Keywords:
CTMRIchondroblastomafluorodeoxyglucose (FDG)positron emission tomography (PET)temporal bone

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Area of Science:

  • Radiology
  • Oncology
  • Pathology

Background:

  • Chondroblastoma is a rare bone tumor.
  • Temporal bone involvement by chondroblastoma is uncommon but significant.
  • Imaging characteristics of temporal bone chondroblastoma are not well-defined.

Purpose of the Study:

  • To describe the imaging features of temporal bone chondroblastoma.
  • To correlate imaging findings with histopathologic features.
  • To improve diagnostic accuracy for this rare tumor.

Main Methods:

  • Retrospective review of 5 patients with temporal bone chondroblastoma.
  • Literature search identifying 11 additional cases.
  • Radiologic and pathologic correlation of all identified cases.

Main Results:

  • Common locations include squamous part, fossae, joint, and tympanic cavity.
  • Key imaging findings: high attenuation with calcification, heterogeneity, low T2 signal intensity with enhancement, smooth brain interface, and FDG PET/CT hypermetabolism.
  • Low T2 signal intensity correlates with calcification and hemosiderin deposition.

Conclusions:

  • Temporal bone chondroblastoma typically appears as an expansile, heterogeneous, hypermetabolic mass.
  • Low T2 signal intensity is a frequent finding, linked to calcification and hemosiderin.
  • Understanding these features aids in differentiating chondroblastoma from other temporal bone pathologies.