Thymoma with osseous metaplasia in an adolescent

Shannon G. Farmakis, Thomas E. Herman, Marilyn J. Siegel

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A 13-year-old girl was incidentally found to have a partially calcified anterior mediastinal mass during the work-up for a left humeral lesion. The resected specimen demonstrated a lymphocyte predominant World Health Organization type B1 thymoma with nodules of metaplastic bone consistent with osseous metaplasia. In addition, she had multiple osteochondromas, a periosteal chondroma of the humerus, a metaplastic osseous pseudotumor of the thigh, and other benign-appearing sclerotic foci, all manifestations of what is likely an autosomal dominant disorder.

Original languageEnglish
Pages (from-to)888-892
Number of pages5
JournalPediatric radiology
Issue number7
StatePublished - Apr 2014


  • Adolescent
  • Osseous metaplasia
  • Osteochondroma
  • Periosteal chondroma
  • Thymoma


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