Carcinoid tumor metastases to the extraocular muscles: MR imaging and CT findings and review of the literature Review uri icon


MeSH Major

  • Carcinoid Tumor
  • Oculomotor Muscles
  • Orbital Neoplasms


  • Although a relatively rare neoplasm, primary carcinoid tumor has an unusual propensity to metastasize to the orbits. Within the orbit, metastatic EOM lesions have been described in scattered reports in the ophthalmology literature but have received little to no attention in the radiology literature. After a retrospective review, we identified CT and MR imaging studies of 7 patients with carcinoid tumor metastatic to the EOM. Our findings suggest that in patients with known carcinoid tumor, well-defined, round, or fusiform masses of the EOM should strongly suggest metastatic involvement. Our series suggests that bilateral lesions may occur and that any EOM can be involved. Knowledge of this pattern of metastatic disease may spare biopsies in some patients, and with current orbit-sparing therapy for patients with localized orbital disease, early and accurate diagnosis can significantly improve patient outcomes.

publication date

  • August 2011



  • Review



  • eng

Digital Object Identifier (DOI)

  • 10.3174/ajnr.A2470

PubMed ID

  • 21659479

Additional Document Info

start page

  • 1208

end page

  • 11


  • 32


  • 7