| ORIGINAL ARTICLE |
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| Year : 2015 | Volume
: 20
| Issue : 3 | Page : 128-132 |
Comparative analysis of spherical and fusiform choledochal cyst based on three-dimensional magnetic resonance cholangiopancreatography, biliary amylase, and histopathological examination
Neel Aggerwal1, Prema Menon2, Katragadda Lakshmi Narasimha Rao1, Kushaljit S Sodhi3, Nandita Kakkar4
1 Department of Pediatric Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
2 Department of Pediatric Surgery, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
3 Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India
4 Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
Correspondence Address:
Dr. Prema Menon
Room No. 3103, Level 3-A, Department of Pediatric Surgery, Advanced Pediatric Centre, P. G. I. M. E. R., Chandigarh - 160 012
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0971-9261.159021
Aims: The aim was to compare biliary amylase, common channel, and gall bladder/liver histopathology between spherical and fusiform choledochal cysts. Materials and Methods: Children undergoing cyst excision with Roux-en-Y hepatico-jejunostomy over a 17 months period were prospectively studied. The common channel was assessed by three-dimensional (3D) magnetic resonance cholangiopancreatography (MRCP). Results: Among 22 patients (spherical = 10, fusiform = 12), there was a higher incidence of spherical cysts in infants (5/7-71.4%) and fusiform cysts in older children (10/15-66.7%) (P = 0.09). Common channel identified in 14 (64%) cases was long (>10 mm) in 5 (38.2%) (one spherical, four fusiform [P = 0.5]) with associated high biliary amylase levels (>500 IU/L) in four (one spherical, three fusiform) (P = 0.05). Exact point of junction of common bile duct with pancreatic duct was visible with coronal half-Fourier-acquisition single-shot turbo spin-echo and 3D sampling perfection with application with optimize contrast using different flip angle evolution sequence using a reformatted plane of axis, particularly coronal, and coronal oblique orientation. Biliary amylase was raised (>100 IU/L) in 4 (40%) in the spherical group, compared to 8 (67%) in the fusiform group. Mean biliary amylase was similar in gallbladder and cyst in spherical but higher in gallbladder in fusiform cysts. Mean biliary amylase was <500 IU/L in 85.7% infants. Five out of 7 infants had liver fibrosis or cirrhosis on histopathology (P = 0.05). There were no dysplastic changes in the gallbladder epithelium. Conclusion: Three-dimensional MRCP delineated the common channel in two-third cases especially in coronal and coronal oblique orientation. The long common channel may have an etiological role in fusiform cysts. Spherical cysts, especially in infants, have a higher incidence of obstructive cholangiopathy.
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