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Sökning: WFRF:(Fjällskog Marie Louise)

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71.
  • Zhou, Wenjing, 1979- (författare)
  • Aspects of Progression in Breast Carcinoma from ductal carcinoma <em>in situ</em> to invasive cancer
  • 2012
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • <p>In the past decades our knowledge concerning breast cancer progression from ductal carcinoma in situ (DCIS) to invasive cancer has grown rapidly. However, molecular factors driving the progression are still largely unknown.</p> <p>In the first study, we investigated tumor evolution in breast cancer by analyzing <em>TP53</em> mutation status in tumors from various stages of the disease. Presence of the same <em>TP53</em> mutations in both DCIS and invasive components from the same tumor indicates same cellular origin. The role of mutant<em> TP53</em> in the progression of breast cancer is less clear and may vary between subtypes.</p> <p>In the second study, we studied the prognosis of basal-like DCIS in a large population-based cohort. Basal-like DCIS was associated with about doubled but not statistically significant risk for local recurrence compared with the other molecular subtypes. Molecular subtype was a better prognostic parameter than histopathological grade.</p> <p>In the third study, we studied markers in primary DCIS in relation to type of recurrence. Interestingly, recurrences after an ER-/HER2+, ER negative or EGFR positive primary DCIS were more often of the <em>in situ</em> type. The molecular subtype ER+/HER2+, FOXA1 positivity and FOXC1 positivity were risk factors for any recurrence.</p> <p>In the fourth study, we proposed a histological classification system for a new entity: neoductgenesis. We also evaluated histologic criteria for neoductgenesis. According to our criteria, good agreements among pathologists were achieved. Neoductgenesis was related to more aggressive tumor biology and to mammographic features. The result indicates potential benefits for women earlier considered having pure DCIS but later diagnosed as breast carcinoma with neoductgenesis, suggesting a need to develop appropriate treatment regiments. Our findings have to be repeated and the relation to prognosis warrants further studies.</p>
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  • Resultat 71-71 av 71
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