Table 1.

Literature source	Findings	Contribution
Wolfe and Evans [1]	A roentgenographic demonstration with postmortem anatomical correlation in a neonate with NEC.	First report of HPVG 1955.
Liebman et al. [7]	This study reviews the 64 reported cases in the literature of HPVG that appears as a branching radiolucency extending to within 2 cm of the liver capsule. Analysis of survivors indicates that the finding of HPVG requires urgent surgical exploration except when it is observed in patients with stable ulcerative colitis.	Literature review of HPVG by plain abdominal radiograph and a reported mortality of 75%.
Kinoshita et al. [8]	This study reviewed the literature on 182 cases of HPVG in adults, and the overall mortality was 39% but varied depending on the underlying disease.	Literature survey of HPVG by plain radiograph and CT