Duplicated gall bladder detected on 99m Tc HIDA hepatobiliary scintigraphy: A report of two cases
An 8-year-old boy presented with recurrent abdominal pain and occasional vomiting since a few months. Liver function tests were normal. USG of the abdomen showed two pear shaped structures in the GB fossa, seen as two adjacent anechoic structures oriented in the same plane [-arrows]; consistent with duplicated GB, with separate cystic ducts. Coronal Magnetic Resonance Imaging (MRI) showed the duplicated GB [-arrows]. After adequate preparation, serial static 99m Tc mebrofenin hepatobiliary study was performed; images being acquired in anterior, right lateral and right anterior oblique views every 2-5 minutes. Static anterior images showed two distinct moieties in GB fossa [-arrow and arrowheads], confirming the diagnosis on USG and MRI, of duplicated GB. Post meal static image [] was compared with pre meal static image [], latter showed significant reduction in GB counts (arrows), suggesting normal contraction of the GB, thus ruling out obstruction.