F-18 Fluorodeoxyglucose Positron Emission Tomography in Pulmonary Cryptococcoma

Chung-Huei Hsu, Chi-Ming Lee, Fong Chieh Wang, Yun-Ho Lin

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Cryptococcosis is not uncommon. Potential interpretation pitfalls should be kept in mind when fluorodeoxyglucose (FDG) positron emission tomography (PET) is used for differentiating pulmonary nodules and for discriminating infection from malignancy, especially in areas where the prevalence of granulomatous infection is high and in immunocompromised patients. In this case, a nodular mass was shown on chest radiography and computed tomographic (CT) scanning. A consolidated infection or a bronchioloalveolar carcinoma was suspected because the CT scan showed air bronchograms within the mass and another perihilar infiltration. The FDG PET scan clearly delineated the lesion and had intermediately high glucose uptake (standard uptake value, 3.8-4.0), which led to the exclusion of the possibility of bronchioloalveolar carcinoma because most of these tumors had normal or mildly increased FDG accumulation. Cryptococcoma was finally diagnosed. Hence, the CT scan and FDG PET played complementary roles in the differential diagnosis of this nodular mass.

Original languageEnglish
Pages (from-to)791-793
Number of pages3
JournalClinical Nuclear Medicine
Issue number9
Publication statusPublished - Sept 2003


  • Cryptococcosis
  • PET

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology


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