In the last decade, scientific studies in the field of children's gastroenterology performed in Lithuania explored different problems:pathology of Helicobacter plori infection and food allergy. Our studies revealed that children with atopic dermatitis had gastrointestinal complaints (abdominal pain, diarrhea, distension and unstable stool, which appeared with the exacerbation of skin rash)more often as compared to nonallergic children of the control group. Abdominal pain in children with atopic dermatitis with local rash was more frequent and lasted longer than in control group children, whereas children with extended rash had stools more frequently.

Gastrointestinal disorders in children with atopic dermatitis statistically significantly did not depend on the extent of skin rash and severity of atopic dermatitis. In our scientific research on the importance of H. pylori infection on children's gastrointestinal system,children with chronic dyspepsia were examined. Endoscopу,rapid urease test,biopsies from antrum and corpus of stomach and their histological examination as well as serologic tests were done. According to the results obtained, we recommend to examine children with chronic dyspepsia in a complex way: not only endoscopic examination. but H. pylori diagnostic tests should be performed as well. Serologic test is not suitable for screening H. pylori infection in children. Considering this, we recommend to use no fewer than two different methods to diagnose this infection. The highest frequency of H. pylori infection was found in children with duodenal ulcer;histological changes in their gastric pylorus and corpus mucosa were greatest. More than half of children with nonulcer dyspepsia were infected with H.pylori. After eradication of H. pylori infection, the prevalence of dyspepsia in children with duodenal ulcer decreased.

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过去10年里，立陶宛在小儿胃肠病学领域对多个课题进行了研究和探索：幽门螺旋杆菌感染和食物过敏的病理学。我们的研究揭示：特异性皮炎患儿的胃肠道症状(腹痛、腹泻、腹胀、排便习惯紊乱这些现象的发生，伴随皮疹的恶化)比对照组非过敏性儿童频发。患特异性皮炎伴局限性皮疹的患儿比对照组儿童腹痛发生频率高而且持续时间长，全身性皮疹的患儿的排便症状则更为频繁。

特异性皮炎患儿中胃肠道紊乱的发生并不取决于皮疹的范围和特异性皮炎的严重程度，这点具有统计学意义。我们对幽门螺旋杆菌感染对小儿胃肠系统重要性进行了科学研究，对慢性消化不良的惠儿给予内镜检测、快速尿素酶检测、胃窦和胃体活检、组织学检测和血清学测试等检查。根据所获结果,我们推荐对慢性消化不良的患儿进行复合检查:不仅需要进行内镜检查，还应进行幽门螺旋杆菌诊断性检测。血清学检测不适合筛查儿童幽门螺旋杆菌感染。因此，我们推荐使用至少两种方法来诊断幽门螺旋杆菌的感染。在十二指肠溃疡的患儿中幽门螺旋杆菌的检出率最高，幽门部和胃体黏膜的组织学改变也最大。超过一半的非溃疡性消化不良患儿有幽门螺旋杆菌感染。当幽门螺旋杆菌根除之后，十二指肠溃疡患儿中的消化不良症状的发生率就会降低。

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