What is a basal like tumor?
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.
What is a Metaplastic tumor?
Abstract. 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.
What is the most common site of breast tumors?
Several studies have found that the upper outer quadrant of the breast is the most frequent site for breast cancer occurrence.
What is the most common pathologic type of breast malignancy?
Invasive ductal carcinoma is the most commonly diagnosed breast cancer and has a tendency to metastasize via lymphatics. This lesion, which accounts for 75% of breast cancers, has no specific histologic characteristics other than invasion through the basement membrane of a breast duct, as seen in the image below.
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.
Are basal cells cancerous?
About 8 out of 10 skin cancers are basal cell carcinomas (also called basal cell cancers). These cancers start in the basal cell layer, which is the lower part of the epidermis. These cancers usually develop on sun-exposed areas, especially the face, head, and neck. They tend to grow slowly.
What is Metaplastic breast carcinoma?
Metaplastic breast cancer (MpBC) is an exceedingly rare breast cancer variant that is therapeutically challenging and aggressive. MpBC is defined by the histological presence of at least two cellular types, typically epithelial and mesenchymal components.
Is Metaplastic carcinoma invasive?
Metaplastic breast cancer is a rare type of breast cancer accounting for around 1% of breast cancers. Metaplastic breast cancer is an invasive cancer, which means it has the potential to spread to other parts of the body.
Are all breast cancers carcinomas?
Most breast cancers are carcinomas, which are tumors that start in the epithelial cells that line organs and tissues throughout the body.
What is basal subtype?
The basal subtype, which represents 15-25% of cases, is characterized by an expression profile similar to that of myoepithelial normal mammary cells. Basal tumors are frequently assimilated to triple-negative (TN) breast cancers.
