Definition

Noun A plasmacytoma is a type of tumor, or neoplasm, composed of plasma cells. These are the white blood cells that produce antibodies. While it can occur in various tissues, it is most commonly found in the bone marrow.

Usage and Examples

• Medical Diagnosis: The term is used primarily in medical contexts to diagnose and describe a specific cancerous growth.
  • Example: The biopsy confirmed the presence of a plasmacytoma in the patient's pelvic bone.
  • Example: A solitary plasmacytoma is a single, isolated tumor, as opposed to multiple myeloma which affects multiple sites.

Advanced Usage and Notes

• Clinical Context: A plasmacytoma is considered a neoplasm of plasma cells. It can be a precursor to or exist independently of multiple myeloma, a more widespread cancer of plasma cells. The distinction between a solitary plasmacytoma and multiple myeloma is critical for treatment planning.
• Location Specification: Although the definition notes it is "usually in bone marrow," it can also occur as an extramedullary plasmacytoma outside the bone marrow, such as in the soft tissues of the upper respiratory tract.

Variants and Related Words

• Plasma Cell: The mature, antibody-producing B cell from which a plasmacytoma originates.
• Multiple Myeloma: A systemic cancer characterized by the proliferation of plasma cells in the bone marrow at multiple sites, often involving several bones.
• Extramedullary Plasmacytoma: A plasmacytoma that occurs in soft tissue outside the bone marrow.

Synonyms

• Plasma cell tumor: A direct descriptive synonym.
• Plasma cell neoplasm: A more general term that encompasses both solitary plasmacacytomas and multiple myeloma.

Noun

1. neoplasm of plasma cells (usually in bone marrow)