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ObjectiveThis study aimed to compare two self-expanding stents, a nitinol stent and an elgiloy stent, both placed percutaneously, in terms of their efficacy in palliating inoperable malignant biliary obstruction.Materials and MethodsWe retrospectively investigated 99 patients with unresectable malignant biliary obstruction treated with percutaneous placement of a self-expanding metallic stent at our institution between May 2007 and January 2010. Serum bilirubin and liver enzyme levels were measured before and 30 days after stenting. For all procedures using elgiloy or nitinol stents, stent occlusion and patient survival rates were calculated using Kaplan-Meyer analysis.ResultsAll of the patients showed clinical improvement after stent placement, with no difference between the two groups. In both groups, the occlusion-free survival rate was 67% at 30 days, 37% at 90 days, 25% at 180 days, and 10% at 360 days, with no significant difference in relation to the type of stent.ConclusionThe two stents evaluated showed comparable efficacy for the percutaneous treatment of unresectable biliary malignancy, with good clinical results.

HepaSphere chemoembolization yielded a substantial objective response rate with an acceptable toxicity profile and should be considered an option for HCC treatment.

Pulmonary interstitial emphysema is a rare condition that generally affects low-weight preterm infants submitted to mechanical ventilation. The prognosis is variable, depending on early diagnosis and treatment. The radiologist plays a key role in this scenario. The authors report a case of persistent pulmonary interstitial emphysema, describing the main characteristics of such entity. Keywords: Pulmonary interstitial emphysema; Newborns; Mechanical ventilation.O enfisema intersticial pulmonar é uma condição rara que acomete, em geral, recém-nascidos pré-termos de baixo peso submetidos a ventilação mecânica. O prognóstico é variável e dependente do diagnóstico e tratamento precoces, ressaltando-se a importância do radiologista neste cenário. Os autores relatam um caso de enfisema intersticial pulmonar persistente, abordando as principais características desta entidade. Unitermos: Enfisema intersticial pulmonar; Neonatos; Ventilação mecânica. Abstract Resumo* Study developed at Instituto de Radiodiagnóstico Rio Preto (Ultra-X), São José do Rio Preto, SP, Brazil.

The modified Trocar technique for percutaneous CT-guided drainage of abdominal abscesses may be feasible for lesions that are difficult to access with conventional methods.