The molecular basis of the evaluation of children suspected of having disorders of surfactant proteins is still under discussion. In this study, we aimed to describe the morphological characteristics and to evaluate the immunohistochemical expression of surfactant proteins (surfactant protein A [SPA], surfactant protein B, and pro-surfactant protein C) in the preterm twins that deceased due to unexplained respiratory distress syndrome (n = 12). Results showed statistically significant positive correlations between surfactant protein B expressions and pulmonary hemorrhage (ρ = 0.678; P < .05), SPA levels, and Apgar score (ρ = 0.605; P < .05) and also expressions of SPA and bronchopneumonia (ρ = 0.695; P < .05). The fetuses and neonates of the same gestational age showed differences among surfactant proteins regarding the immunostaining expression. Our data evidence a marked interindividual variability in the expression of all 3 surfactant proteins among the cases analyzed (n = 12), suggesting the intervention of some individual and epigenetic factors during gestation that might influence surfactant protein production and consequently survival rate.Abbreviations: ELBW = extremely low birth weight, GA = gestational age, PI = ponderal index, RDS = respiratory distress syndrome, SPA = surfactant protein A, SPB = surfactant protein B, SPC = surfactant protein C, SPD = surfactant protein D.
Non-Hodgkin malignant lymphomas represent a heterogeneous group of monoclonal tumors developing from cells belonging to the immune system. Primary gastric lymphomas are defined as those malignant limphoproliferative diseases whose initial symptoms are located in the stomach or tumor mass located in the stomach. This paper aims to present a new case of primary gastric non Hodgkin lymphoma diagnosed by histologic and immunohistochemical examination of a partial gastrectomy specimen. The patient is a 51-years old man with a history of smoking, hospitalized for asthenia, hematemesis and melena. Microscopically the tumor consisted of mature small lymphocytes admixed with plasmocitoid lymphocytes and mature plasmocytes. Some of the tumoral cells showed citoplasmatic pas positive inclusions. Immunohistochemical stains were strongly positive for CD20 and 30-40% positive for Ki67.Based on the clinical and histological findings, a diagnosis of gastric primary non-Hodgkin lymphoma was established.
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