AccueilCancerStades du cancer du sein
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Le stade du cancer du sein est déterminé par la classification TNM : T – tumeur, N – ganglions lymphatiques, M – métastases. La classification TNM détaillée donne une description précise de la taille de la tumeur, de l'atteinte des ganglions lymphatiques et des métastases, tandis que le grade de malignité (Grade) indique la vitesse à laquelle la tumeur se développe et se propage.

T — tumeur primitive

N — métastases dans les ganglions lymphatiques régionaux

M — métastases à distance

M0 : pas de métastases à distance. M1 : présence de métastases à distance (par exemple dans les poumons, le foie, les os ou le cerveau).

Qu'est-ce que le grade de malignité du cancer (Grade) ?

Le grade indique l'aspect anormal des cellules cancéreuses et la vitesse à laquelle la tumeur est susceptible de se développer et de se propager. G1 : bien différencié — les cellules ont un aspect relativement normal et se développent lentement. G2 : modérément différencié. G3 : peu différencié — les cellules ont un aspect très anormal et ont tendance à se développer et à se propager plus rapidement.

Supplément connexe

La chimiothérapie supprime l'immunité. Les polysaccharides de champignons concentrés sont étudiés pour leur capacité à activer les cellules NK et les macrophages.

Lentinan AXT par Zenius Labs™ →

Foire aux questions

Comment le cancer du sein est-il stadifié ?

Par la classification TNM : T (taille de la tumeur), N (ganglions lymphatiques régionaux), M (métastases à distance). T va de Tis (in situ) à T1-T4 ; N de N0 à N3 ; M0 ou M1. Ceux-ci se combinent pour former les stades 0 à 4.

Que signifie le grade du cancer du sein ?

Le grade indique l'aspect anormal des cellules et la vitesse à laquelle la tumeur est susceptible de se développer : G1 (bien différencié, lent), G2 (modéré), G3 (peu différencié, à croissance plus rapide). Le grade est utilisé en parallèle du statut des récepteurs hormonaux et du statut HER2.

Qu'est-ce qu'un carcinome in situ ?

Le carcinome in situ (Tis) est un état précancéreux — comme le CCIS (carcinome canalaire in situ) ou la maladie de Paget sans tumeur invasive — dans lequel les cellules anormales ne se sont pas encore propagées dans les tissus environnants.

Peut-on soutenir le système immunitaire pendant un cancer du sein ?

Oui. La chimiothérapie affaiblit le système immunitaire. Les extraits concentrés de polysaccharides de champignons sont étudiés pour leur rôle dans l'activation des cellules NK et des macrophages. Une formule concentrée à plusieurs extraits comme Lentinan AXT de Zenius Labs™ est préférable.

Références
  1. Liu Z et al. Natural killer cell-related prognostic risk model predicts prognosis and treatment outcomes in triple-negative breast cancer. Frontiers in immunology. 2023. PubMed
  2. Desroys du Roure P et al. A novel Fc-engineered cathepsin D-targeting antibody enhances ADCC, triggers tumor-infiltrating NK cell recruitment, and improves treatment with paclitaxel and enzalutamide in triple-negative breast cancer. Journal for immunotherapy of cancer. 2024. PubMed
  3. Han E et al. Characterization of tumor-infiltrating lymphocytes and their spatial distribution in triple-negative breast cancer. Breast cancer research : BCR. 2024. PubMed
  4. Ding S et al. Single-cell atlas reveals a distinct immune profile fostered by T cell-B cell crosstalk in triple negative breast cancer. Cancer communications (London, England). 2023. PubMed
  5. Lu H et al. TLR2 agonist PSK activates human NK cells and enhances the antitumor effect of HER2-targeted monoclonal antibody therapy. Clinical cancer research : an official journal of the American Association for Cancer Research. 2011. PubMed
  1. Luo L et al. Single-cell RNA sequencing identifies molecular biomarkers predicting late progression to CDK4/6 inhibition in patients with HR+/HER2- metastatic breast cancer. Molecular cancer. 2025. PubMed
  2. Zheng G et al. Interaction between HLA-G and NK cell receptor KIR2DL4 orchestrates HER2-positive breast cancer resistance to trastuzumab. Signal transduction and targeted therapy. 2021. PubMed
  3. Collins DM et al. Effects of HER Family-targeting Tyrosine Kinase Inhibitors on Antibody-dependent Cell-mediated Cytotoxicity in HER2-expressing Breast Cancer. Clinical cancer research : an official journal of the American Association for Cancer Research. 2021. PubMed
  4. Blackburn AM et al. Tamoxifen and liver damage. British medical journal (Clinical research ed.). 1984. PubMed
  5. Zhou WB et al. Osthole prevents tamoxifen-induced liver injury in mice. Acta pharmacologica Sinica. 2019. PubMed
  6. Tabassum H et al. Catechin as an antioxidant in liver mitochondrial toxicity: Inhibition of tamoxifen-induced protein oxidation and lipid peroxidation. Journal of biochemical and molecular toxicology. 2007. PubMed
  7. Elefsiniotis IS et al. Tamoxifen induced hepatotoxicity in breast cancer patients with pre-existing liver steatosis: the role of glucose intolerance. European journal of gastroenterology & hepatology. 2004. PubMed
  8. Li Y et al. Comprehensive Analysis of Regulatory Factors and Immune-Associated Patterns to Decipher Common and BRCA1/2 Mutation-Type-Specific Critical Regulation in Breast Cancer. Frontiers in cell and developmental biology. 2021. PubMed
  9. Hermsen BB et al. Humoral immune responses to MUC1 in women with a BRCA1 or BRCA2 mutation. European journal of cancer (Oxford, England : 1990). 2007. PubMed
  10. Muñante B et al. Clinical Management in BRCA Carriers with Early Breast Cancer. Cancer control : journal of the Moffitt Cancer Center. 2025. PubMed
  11. Grandal B et al. Impact of BRCA Mutation Status on Tumor Infiltrating Lymphocytes (TILs), Response to Treatment, and Prognosis in Breast Cancer Patients Treated with Neoadjuvant Chemotherapy. Cancers. 2020. PubMed
  12. Tani M et al. In vitro generation of activated natural killer cells and cytotoxic macrophages with lentinan. European journal of clinical pharmacology. 1992. PubMed
  13. Hamano K et al. The preoperative administration of lentinan ameliorated the impairment of natural killer activity after cardiopulmonary bypass. International journal of immunopharmacology. 1999. PubMed
  14. Mattiola I et al. The macrophage tetraspan MS4A4A enhances dectin-1-dependent NK cell-mediated resistance to metastasis. Nature immunology. 2019. PubMed
  15. Hermans L et al. β-Glucan-Induced IL-10 Secretion by Monocytes Triggers Porcine NK Cell Cytotoxicity. Frontiers in immunology. 2021. PubMed
  16. Ooshiro M et al. [Ten cases of advanced gastro-intestinal cancer that required preoperative dosage of PSK]. Gan to kagaku ryoho. Cancer & chemotherapy. 2009. PubMed
  17. Maehara Y et al. Postoperative PSK and OK-432 immunochemotherapy for patients with gastric cancer. Cancer chemotherapy and pharmacology. 1993. PubMed
  18. Ito G et al. Correlation between efficacy of PSK postoperative adjuvant immunochemotherapy for gastric cancer and expression of MHC class I. Experimental and therapeutic medicine. 2012. PubMed
  19. Yoshinaga K et al. Prognostic markers for immunochemotherapy using tegafur -uracil (UFT) and protein-bound polysaccharide K (PSK). Fukuoka igaku zasshi = Hukuoka acta medica. 2013. PubMed
  20. Park JS et al. Astaxanthin decreased oxidative stress and inflammation and enhanced immune response in humans. Nutrition & metabolism. 2010. PubMed
  21. Genç Y et al. Oxidative Stress and Marine Carotenoids: Application by Using Nanoformulations. Marine drugs. 2020. PubMed
  22. Ávila-Román J et al. Anti-Inflammatory and Anticancer Effects of Microalgal Carotenoids. Marine drugs. 2021. PubMed
  23. Cheng J et al. The Promising Effects of Astaxanthin on Lung Diseases. Advances in nutrition (Bethesda, Md.). 2021. PubMed
  24. Fang J et al. Structure of a β-glucan from Grifola frondosa and its antitumor effect by activating Dectin-1/Syk/NF-κB signaling. Glycoconjugate journal. 2012. PubMed
  25. Zhang M et al. β-Glucan from Saccharomyces cerevisiae induces SBD-1 production in ovine ruminal epithelial cells via the Dectin-1-Syk-NF-κB signaling pathway. Cellular signalling. 2019. PubMed
  26. Gringhuis SI et al. Dectin-1 directs T helper cell differentiation by controlling noncanonical NF-kappaB activation through Raf-1 and Syk. Nature immunology. 2009. PubMed
  27. Jia XM et al. CARD9 mediates Dectin-1-induced ERK activation by linking Ras-GRF1 to H-Ras for antifungal immunity. The Journal of experimental medicine. 2014. PubMed
  28. Wang Y et al. Systematic review and meta-analysis on the efficacy and safety of Injectable Lentinan combined with chemotherapy in the treatment of gastric cancer. Phytomedicine : international journal of phytotherapy and phytopharmacology. 2024. PubMed
  29. Oba K et al. Individual patient based meta-analysis of lentinan for unresectable/recurrent gastric cancer. Anticancer research. 2009. PubMed
  30. Wang Y et al. Investigation on the efficiency of lentinan for injection combining cisplatin on treating malignant pleural effusion based on systematic review and meta-analysis. Medicine. 2024. PubMed
  31. Zhang M et al. Mushroom polysaccharide lentinan for treating different types of cancers: A review of 12 years clinical studies in China. Progress in molecular biology and translational science. 2019. PubMed
  32. Larnder AH et al. The estrobolome: Estrogen-metabolizing pathways of the gut microbiome and their relation to breast cancer. International journal of cancer. 2025. PubMed
  33. Kwa M et al. The Intestinal Microbiome and Estrogen Receptor-Positive Female Breast Cancer. Journal of the National Cancer Institute. 2016. PubMed
  34. Huang Y et al. Intratumoral Microbiome-related MRI Model for Predicting Breast Cancer Shrinkage Pattern Following Neoadjuvant Therapy. Radiology. 2025. PubMed
  35. Zetner D et al. Effect of melatonin cream on acute radiation dermatitis in patients with primary breast cancer: A double-blind, randomized, placebo-controlled trial. Journal of pineal research. 2023. PubMed
  36. Zetner D et al. Quality-of-life outcomes following topical melatonin application against acute radiation dermatitis in patients with early breast cancer: A double-blind, randomized, placebo-controlled trial. Journal of pineal research. 2023. PubMed
  37. Wang H et al. Efficacy of biological response modifier lentinan with chemotherapy for advanced cancer: a meta-analysis. Cancer medicine. 2017. PubMed
  38. Oba K et al. Efficacy of adjuvant immunochemotherapy with polysaccharide K for patients with curative resections of gastric cancer. Cancer immunology, immunotherapy : CII. 2007. PubMed
  39. Cheng SC et al. mTOR- and HIF-1α-mediated aerobic glycolysis as metabolic basis for trained immunity. Science (New York, N.Y.). 2014. PubMed
  40. Kidd P Astaxanthin, cell membrane nutrient with diverse clinical benefits and anti-aging potential. Alternative medicine review : a journal of clinical therapeutic. 2011. PubMed