Answer of June 2007

 

Clinical History:


59-day-old baby girl presented with antenatal USG finding of polycystic mass in left renal region.



        Figure 1. Noncontrast axial CT image


    Figure 2. Noncontrast coronal CT image


      Figure 3. Postcontrast axial CT image


    Figure 4. Postcontrast coronal CT image

 

Diagnosis:


Mature Teratoma


Discussion:


The radiological features supporting the diagnosis of mature teratoma include calcification in linear strand pattern in the noncontrast coronal view which resembles architecture of osseous component. In neuroblastoma, it is usually associated with regular stippled calcification rather than linear calcification. In addition, from the postcontrast axial and coronal view, this mass displaces adjacent SMA and celiac trunk rather than encasing them. This again favours the diagnosis of mature teratoma.