Imaging of invasive thymoma in the costophrenic recess presenting as thickening of arcuate ligaments of the diaphragm

Fergus V. Coakley, Michael John Grant, Spencer Behr, Bryan R. Foster, Elena K. Korngold, Ryne A. Didier

Research output: Contribution to journalArticle

1 Scopus citations


Imaging findings in a patient with invasive thymoma in the costophrenic recess are presented, in whom computed tomography (CT) and MRI revealed lateral arcuate ligament thickening. Increased fluoro-deoxy-glucose (FDG) uptake on subsequent positron emission tomography (PET)/CT was helpful in suggesting the correct diagnosis. A second patient with much more obvious invasive thymoma occurring in the costophrenic recess is presented for comparison. It is a well-known fact that thymic malignancies can metastasize to the pleura even years after resection. Rarely, they may present as focal thickening of the diaphragmatic lateral arcuate ligament.

Original languageEnglish (US)
Pages (from-to)529-531
Number of pages3
JournalClinical Imaging
Issue number4
StatePublished - Jul 2014



  • Arcuate ligament
  • Computed tomography
  • FDG/PE
  • Lateral
  • Thymoma

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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