PT  - JOURNAL ARTICLE
AU  - Kumar, Nandigam S
AU  - Barve, Ketaki
AU  - Joshi, Jyotsna
AU  - BASU, SANDIP
TI  - Low grade FDG uptake on the rim of “doughnut” in PET-CT in an asymptomatic Hydatid cyst: is inflammatory activity a determinant of symptoms?
AID  - 10.2967/jnmt.115.155408
DP  - 2015 Jun 01
TA  - Journal of Nuclear Medicine Technology
PG  - jnmt.115.155408
4099  - http://tech.snmjournals.org/content/early/2015/06/24/jnmt.115.155408.short
4100  - http://tech.snmjournals.org/content/early/2015/06/24/jnmt.115.155408.full
AB  - Herein we present an untreated asymptomatic incidentally diagnosed suspected case of pulmonary hydatid cyst with its atypically low grade 18F-FDG uptake on the peripheral rim of the cyst with minimal increase on dual point imaging of 18F-FDG- PET-CT. The patient underwent 18F-FDG-PET/CT for characterization of solitary lung lesion on chest X-ray and inconclusive ceCT features. While the diagnosis was confirmed by serum IHA positive for echinococcus granulosus, the low grade 18F-FDG uptake in the context of asymptomatic presentation of the disease is noteworthy, that could be related to minimal active inflammation. When placed in context of similar published reports, it could be hypothesized that the inflammatory 18F-FDG uptake could be an additional determinant of symptoms in this group of patients.