Histopathological analysis of mucinous breast cancer subtypes and comparison with invasive carcinoma of no special type.

Mucinous breast cancer (MBC) is a rare histological type of breast cancer characterized primarily by mucin's production and extracellular presence. MBC is usually associated with a better prognosis than other invasive breast neoplasms. Because of the low prevalence, MBC biology is not well understood. The aim of the present study was to introduce the last 2-year experience regarding MBC pathological diagnostics in our clinical center and comparison of the obtained data with invasive breast carcinoma of no special type (NST) comprising the most common invasive breast cancer. We identified 24 MBC cases representing 3.09% of all 766 invasive breast cancers, including 15 cases of pure type and 9 mixed MBCs. The median MBC patients' age at presentation was 65.5 years. Compared to NST, MBC presented a higher T stage with a statistically larger tumor median size, although lower regional lymph node involvement, tumor histological grade and TNM stage. MBC is a rare type of breast cancer, accounting for about 4% of all diagnosed breast cancers. Our findings are consistent with those published in recent years and show significant differences between MBC and NST cancer patients and also highlight differences between pure and mixed MBC, emphasizing the essence of their differentiation. MBC is associated with a better long-term prognosis than NST and is characterized by the less aggressive biological behavior expressed through favorable clinicopathologic features in terms of tumor grade, regional lymph node involvement and hormone receptor status.

Causes of delays in breast cancer diagnosis in Poland.

Breast cancer is the most common malignant tumor in women. The results of breast cancer treatment to a large extent depend on the time of the primary diagnosis of the disease. AIM: The aim of this study was to determine the most common causes of the delay and the delay time in the diagnosis of breast cancer in Polish women. MATERIALS AND METHODS: The study was performed using a diagnostic survey and analysis of medical documentation from the Subcarpathian Regional Oncology Center, Poland. A total of 231 patients with diagnosed breast cancer were recruited to the study. RESULTS: Delays in diagnosing of breast cancer were found in 83.1% of all the patients. The average time from the first symptom observation by a woman to the first medical consultation was on average 61.7 days. The most common cause of the delay in medical consultation in the examined group was a fear of diagnosing cancer (31.2%). CONCLUSIONS: The examined women require permanent health education in the field of breast cancer and the importance of early diagnosis of the disease for the effectiveness of treatment and prognosis.

Hypoxia in breast cancer.

Breast cancer continues to be one of the most common malignancies and is a serious problem particularly in women, although men may also be affected. Such lesions are commonly accompanied by hypoxia, and therefore hypoxia-dependent mechanisms, such as overexpression of hypoxia-inducible factor (HIF), the mechanisms are studied as part of the search for a novel method of cancer treatment. Blocking the activity of HIF and HIF-dependent molecular changes raises hopes for identification of a molecular target to inhibit the tumor growth or even to completely prevent its progression. However, this is difficult due to the crucial role HIF plays in numerous processes occurring not only in cancer cells but mostly in healthy systemic cells in physiological conditions.