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Related Experiment Videos

Rounded atelectasis: a pulmonary pseudotumor.

G W Szydlowski1, H E Cohn, R M Steiner

  • 1Department of Surgery, Jefferson Medical College, Philadelphia, Pennsylvania 19107.

The Annals of Thoracic Surgery
|May 1, 1992
PubMed
Summary
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Rounded atelectasis, a benign lung condition, is often mistaken for cancer. Recognizing its unique "comet tail" sign on imaging can prevent unnecessary surgeries.

Area of Science:

  • Radiology
  • Pulmonary Medicine
  • Thoracic Surgery

Background:

  • Rounded atelectasis is a benign condition frequently misdiagnosed as a pulmonary neoplasm.
  • It arises from infolding of lung tissue with pleural, vascular, and bronchial components.
  • Often associated with chronic pleural disease or effusions, it is typically asymptomatic.

Observation:

  • Radiographic findings include a rounded, pleural-based opacity with adjacent pleural thickening and lobar volume loss.
  • The pathognomonic "comet tail" sign represents crowded vessels and bronchi entering the atelectatic area.
  • While generally stable, slow changes in size have been observed.

Findings:

  • A retrospective review identified 7 cases of rounded atelectasis over 9 years.

Related Experiment Videos

  • Three cases underwent surgery to rule out malignancy; one was incidental during other surgery.
  • Three cases were managed expectantly with follow-up.

    • Implications:

    • Accurate recognition of rounded atelectasis and its characteristic imaging features is crucial.
    • Diagnosis can obviate the need for further invasive workup, such as thoracotomy.
    • Distinguishing this benign entity avoids unnecessary surgical intervention for suspected lung cancer.