What is basal like tumor?

Is triple negative the same as basal?

Basal-like breast cancer is similar to triple-negative breast cancer because the cancer cells often don’t have receptors for estrogen, progesterone and HER2. But basal-like breast cancer cells have changes in the proteins that triple-negative breast cancers usually don’t have.

What is a basal-like phenotype?

Basal-phenotype or basal-like breast cancers are characterized by basal epithelium cytokeratin (CK5/14/17) expression, negative estrogen receptor (ER) status and distinct gene expression signature.

What is basal-like TNBC?

Triple-negative breast cancer (TNBC) is defined as a type of breast cancer with negative expression of estrogen (ER), progesterone (PR), and human epidermal growth factor receptor-2 (HER2) [3]. Gene expression profiling analysis often classifies TNBC as a subtype of basal-like breast cancer (BLBC).

What are basal markers?

Basal-like breast cancers are identified by a variety of immunohistochemical markers, such as cytokeratins (CK5, CK6, CK14 or CK17), EGFR, SMA, P-cadherin, p63 or c-kit antigen.

What does basal-like mean?

Basal-like breast cancer (BLBC) is a particularly aggressive molecular subtype defined by a robust cluster of genes expressed by epithelial cells in the basal or outer layer of the adult mammary gland. BLBC is a major clinical challenge because these tumors are prevalent in young woman, often relapsing rapidly.

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What is molecular classification?

What are the molecular subgroups? The current molecular classification divides breast cancer into five groups as luminal A, luminal B, HER-2, basal and normal breast like. Further grouping of these subgroups seem possible and necessary.

What is HER2 enriched?

HER2-enriched breast cancer is hormone-receptor negative (estrogen-receptor and progesterone-receptor negative) and HER2 positive.

Are there different types of TNBC?

Triple-negative breast cancer (TNBC) has been subdivided into six distinct subgroups: basal-like 1 (BL1), basal-like 2 (BL2), mesenchymal (M), mesenchymal stem–like (MSL), immunomodulatory (IM), and luminal androgen receptor (LAR).

What is TNBC?

Triple-negative breast cancer (TNBC) accounts for about 10-15% of all breast cancers. The term triple-negative breast cancer refers to the fact that the cancer cells don’t have estrogen or progesterone receptors and also don’t make too much of the protein called HER2.

Who makes Sacituzumab Govitecan?

Credit: Gilead Sciences, Inc. Among participants without brain metastases, sacituzumab measurably shrank tumors in 35% of those who received it, according to trial results published April 22 in the New England Journal of Medicine.

What cells are involved in basal cell carcinoma?

One type of skin cancer called basal cell carcinoma begins in the basal cells, which make skin cells that continuously push older cells toward the surface. As new cells move upward, they become flattened squamous cells, where a skin cancer called squamous cell carcinoma can occur.

What is metaplastic carcinoma of the breast?

Metaplastic breast cancer (MBC) is a malignancy characterized by the histologic presence of two or more cellular types, commonly a mixture of epithelial and mesenchymal components. MBC is rare relative to invasive ductal carcinoma (IDC), representing less than 1% of all breast cancers.

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What is medullary tumor?

It is called “medullary” carcinoma because the tumor is a soft, fleshy mass that resembles a part of the brain called the medulla. Medullary carcinoma can occur at any age, but it usually affects women in their late 40s and early 50s. Medullary carcinoma is more common in women who have a BRCA1 mutation.