Purpose. To develop a new relaxing incision on the anterior wall of rectus sheath and to compare its efficiency with the classical counterparts in the experiment. Materials and methods. We measured tension nodal seam with the help of a spring dynamometer on 24 cadavers. This seam was overlaid on the inner edge of the rectus abdominis in the region of the umbilical ring before and after relaxing incision. The objects of study were divided into four groups randomly. We studied the proposed wavelike relaxing incision in the first group and classical methods in other groups. Results.  Maximum relaxation nodal seam (56%) was observed when using a wavelike relaxing incision of anterior wall of  rectus sheath. Vertical relaxing incision of aponeurosis of the external oblique abdominal muscles along the lateral edge of the rectus abdominis (by O. M. Ramirez) was close in efficiency to the proposed method. It is possible to reduce tension of the nodal seam at 48%. Relaxing effect arc-shaped relaxing incision of anterior wall of rectus sheath by V.I. Belokonev was 39%. Vertical relaxing incision in a staggered pattern by U.Z. Zagirov showed minimal relaxing effect – 25%. Conclusion. Wavelike relaxing incision of anterior wall of rectus sheath which was proposed allows reducing tissue tension in hernioplasty compared to the classical methods.

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Introduction. primary mucinous carcinoma of the eyelid skin is a rare adenocarcinoma of skin glands. This tumor rarely metastasizes but frequently recurs.The study objective is to describe a rare clinical case of primary mucinous carcinoma of the eyelid skin, present macroscopic, histological and immunohistological descriptions of this pathology.Clinical case. male, 66 years old, sought medical care due to a neoplasm of the lower eyelid. macroscopically a subcutaneous node 1.2 × 1.0 cm was observed, of yellow-brown color, gelatinous in section. microscopic examination showed that the tumor consists of islands of epithelial cells surrounded by mucinous “lakes”. Immunohistochemical examination showed Ck7, estrogen, p53 expression in the tumor cells, as well as absence of Ck20 expression. Based on the data of macro-, microscopic and immunohistochemical examinations, primary mucinous carcinoma of the eyelid skin was diagnosed. Observed morphological signs of this tumor allow to differentiate it from cancer metastasis.Conclusion. primary mucinous carcinoma of the skin should be differentiated from metastasis of mucinous carcinoma of the breast, lung, colon, et al. macro- and microscopic signs of this tumor are subjective. Immunohistochemical examination is a more reliable diagnostic tool.

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