Highlights d Identification of fetal-associated endothelial cells and macrophages in HCC d Embryonic-like reprogramming in a subset of FOLR2 + TAM1s d Conserved GRN in mouse embryonically seeded, human fetal-liver, and TAM1 macrophages d Shared onco-fetal ecosystem between human fetal liver and HCC

Clinical presentation and radiography are unreliable in the preoperative diagnosis of fish bone perforation of the GI tract. This limitation can be overcome with the use of CT, which is accurate in showing the offending fish bone. The accuracy of CT is limited by observer dependence. A high index of suspicion should always be maintained for the correct diagnosis to be made.

Adult intussusception is most commonly secondary to a pathologic lead point. The site of intussusception in the colon and the presence of anemia are independent preoperative predictors of malignancy. All colonic intussusceptions should be resected en bloc without reduction, whereas a more selective approach can be applied for enteric intussusceptions.

Traumatic pneumorrhachis is extremely rare, and a review of the English literature has revealed only 31 reported cases. We review the cause and pathophysiology of this unique entity in trauma patients. We also discuss the significance of this entity to the trauma specialist, paying special attention to the differences between air in the subarachnoid space versus air in the epidural space.

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