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We studied the content and expression of mRNA for estrogen receptors-alpha and -beta in breast tumors before and after 3-month neoadjuvant hormone therapy with antiestrogen tamoxifen and/or aromatase inhibitors. Expression of estrogen receptors-alpha and -beta was most often detected in ER+PR+ tumors and most significantly decreased in these neoplasms after exemestane therapy. Immunocytochemical and radioligand assays showed that tamoxifen and anastrozole have little effect on the number of estrogen receptors-alpha. The number of progesterone receptors in tumors decreased by the end of anastrozole therapy. Estrogen receptors-beta were immunocytochemically revealed in 50% primary breast tumors. Anastrozole slightly decreased, while tamoxifen increased the incidence of these receptors. Interruption of signaling through estrogen receptors and suppression of estrogen biosynthesis had different effects on the receptor status of neoplasms and distribution of estrogen receptors-alpha and -beta.

Additional covering of the lower pole with allomaterial or its synthetic analogues during immediate breast reconstruction is being performed at the N. N. Petrov National Medical Research Oncology Center, Ministry of Health of Russia, for last 7 years. Initially, epidermal flap was the only option for lower pole coverage; later acellular dermal matrix was used as part of clinical approbation. Average complication rate ranges from 20–35 % due to blood circulatory (supply) disorders.Since 2018, a titanised mesh been used as an additional coverage of the lower pole in the department of breast tumors. Through coating characteristics and its structure the frequency of fatal complications significally decreased.

Резюме Tрижды негативный рак молочной железы (ТНРМЖ) составляет примерно 15%-20% от всех диагностированных случаев рака молочной железы и характеризуется отсутствием экспрессии рецепторов эстрогена (ЭР), рецепторов прогестерона (ПР), а также отсутствием экспрессии белка человеческого эпидермального фактора роста (HER2) белка. Гетерогенность трижды негативного рака молочной железы является основным препятствием в лечении данного подтипа опухоли. Хотя рецепторы эстрогенов (ЭР) и рецептор человеческого эпидермального фактора роста (HER2) являются основными терапевтическими мишенями при раке молочной железы, рецептор андрогена (AR) в последнее время получил развитие в качестве молекулярной мишени в лечении опухолей, резистентных к стандартным способам лечения.

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