Pulmonary harmartoma

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[edit] Discussion of Pulmonary harmartoma

  • Hamartomas are the most common benign pulmonary neoplasm.
  • Prevalence of hamartomas at autopsy has been reported at nearly 0.25%.
  • Hamartomas may be chondromatous or leiomyomatous, the former being more common.
  • They are unencapsulated, lobulated tumors with connective tissue septa.


  • Patients present between the 4th and 7th decades of life.
  • Male predilection of 2:1 to 3:1.
  • Typically, hamartomas manifest incidentally as solitary nodules in the periphery of the lung.

[edit] Imaging Findings for Pulmonary harmartoma

Popcorn

[edit] Plain film

  • Conventional radiographs show a sharply demarcated pulmonary nodule that may contain popcorn calcifications characteristic of the chondroid calcifications in hamartomas.
  • This pattern is a reliable indicator of a benign lesion but is present in only a minority of cases.

[edit] CT

  • At CT, the reported prevalence of calcification in hamartomas varies from 5% to 50%.
  • Fat is identified in up to 50% of hamartomas at CT and may be localized or generalized within the nodule. Intranodular fat at -40 HU to -120 HU is considered a reliable indicator of a hamartoma.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

Goldminer: Pulmonary harmartoma

[edit] References for Pulmonary harmartoma