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ball
(redirected from fungus ball)

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Fungus balls (eg, mycetomas, and urobezoars) can extend down the ureter as casts within the collecting system (seen as the "cat's tail sign"), and this can result in mechanical obstruction.
2,6) A diagnosis of mycetoma should be considered when computed tomography (CT) demonstrates a focal mass or diffuse area of increased radiodensity and magnetic resonance imaging (MRI) shows a correlating marked decrease in intensity on T1- and T2-weighted imaging, making the fungus ball "invisible" as it blends with the adjacent air of the sinus.
THE distinctive white fungus ball is found in meadows, pastures and undergrowth, most commonly between July and November: rare examples have been recorded at 4ft in diameter.
 
 
 
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