Gd-BOPTA during both dynamic and delayed phases provides morphologic and functional information for the characterization of FNH.

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Research Summary We examine the effect of face‐to‐face interactions between acquirers and targets before the acquisition announcements on acquisition returns. We argue that frequent interactions increase the target management's trust in the acquirer and benefit the acquirer by mitigating competition in the bidding process. For a sample of U.S. domestic acquisitions, we use smartphone geolocational data to measure the movement of people between merging companies in the months before the announcement. We find that with more frequent interactions, acquirers earn higher stock market returns at the announcement and targets receive fewer later bids from other bidders. Moreover, more frequent interactions are associated with lower returns to public targets vis‐à‐vis their acquirers. The effect of interactions is weaker when shareholder‐manager agency problems in the target are less severe. Managerial Summary Previous research shows that while acquisitions can create synergistic gains, the presence of potentially competing bidders forces acquirers to pay a high price for their targets, which makes acquisitions generally unprofitable for acquirers. We provide evidence suggesting that frequent social interactions between the acquirer's and the target's management in the pre‐acquisition phase increase the target management's trust in the acquirer, making it more willing to cede control to the acquirer and less eager to seek alternative bidders. By mitigating competition in the bidding process, social interactions make acquisitions more profitable for acquirers vis‐à‐vis targets. Social interactions are less effective when the target's management owns a larger share of the target or is better monitored by shareholders (e.g., in companies with concentrated ownership or private companies).

Synovial chondromatosis (SC) is a rare condition with a very variable clinical presentation, thus making the diagnosis not immediate. We report a case of massive primary SC of the knee, properly evaluated with X-rays, ultrasonography and magnetic resonance imaging and successfully treated with an arthroscopic approach.

Contrast-enhanced ultrasonography can improve the characterization of SPTs by showing the typical rim enhancement of these pancreatic tumors.

The current availability of liver-specific contrast media (LSCM) allows the possibility to obtain an accurate diagnosis when studying focal liver lesions (FLL). It is necessary to have an in-depth knowledge of the biologic and histologic characteristics of FLL and the enhancement mechanism of LSCM to gain significant accuracy in the differential diagnosis of FLL. It is possible to subdivide FLL into three main groups according to the kinetics of contrast enhancement: hypervascular FLL, hypovascular FLL, and FLL with delayed enhancement. Dynamic contrast-enhanced magnetic resonance imaging is an important tool in the identification and characterization of FLL. LSCM with a first phase of extracellular distribution give both dynamic (morphologic) and late phase (functional) information useful for lesion characterization. With LSCM it is possible to differentiate with high accuracy benign from malignant lesions and hepatocellular from nonhepatocellular lesions. To understand contrast behavior after injection of LSCM, it is necessary to correlate contrast enhancement with the biologic and histologic findings of FLL.

The resource-based view claims that bundles of resources are the key determinants of a firm's value. Yet, market value spillovers stemming from firms' resource bases have received scarce attention in the literature. This article provides evidence of such spillovers in the context of technological acquisitions. I hypothesize that acquisitions act as signals, revealing to investors that the acquired technologies are more valuable than initially expected. These signals should affect firms owning similar technological resources. Measuring technological similarity with the text similarity of firms' patent portfolios, I find that the announcement of an acquisition brings a positive revaluation of firms with technological resources like those of the target. These spillovers also reach firms with a product market focus different from those of the merging firms.

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