Clear cell tumour of the lung

Dr Henry Knipe and Dr Yuranga Weerakkody et al.

Clear cell tumours of the lung are rare benign pulmonary neoplasms that contain an abundant amount of glycogen. It is often classified under the spectrum of perivascular epithelioid cell tumours (PEComas).

Radiographic features

Usually seen as a rounded, smooth-walled, and peripheral parenchymal nodule without cavitation or calcification. There is no recognised lobar distribution. 


These tumours usually show intense post-contrast enhancement which is thought to be related to its rich vascular stroma 1,4.

History and etymology

It was initially described by A A Liebow and B Castleman in 1963 2.

Lung cancer
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Article information

rID: 21315
System: Chest, Oncology
Tag: cases
Synonyms or Alternate Spellings:
  • Clear cell tumour of the lungs
  • Sugar tumour of lung
  • Sugar tumor of lung
  • Benign clear cell tumour of the lung
  • Clear cell tumour of lung
  • PEComa of the lung
  • Clear cell "sugar" tumor (CCST) of the lung
  • Clear cell "sugar" tumour (CCST) of the lung
  • Clear cell "sugar" tumor (CCST) of the lungs
  • CCST lung
  • Clear cell tumors of the lung (CCTL)

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