CD19+CD27-CD21-CD38- (% Pos of B)

check icon Optimal Result: 0.5 - 2.9 %.

Naive B cells CD19+CD27-CD21-CD38- are a specific subset of B cells with distinct surface marker characteristics:

  • CD19+: This marker indicates that these cells express the CD19 antigen, which is commonly found on B cells.

  • CD27-: The absence of CD27 expression suggests that these B cells are not memory B cells. CD27 is typically expressed on memory B cells.

  • CD21-: The absence of CD21 expression may indicate that these B cells have reduced levels of complement receptor 2 (CR2), which can affect their ability to respond to complement-mediated signals.

  • CD38-: The absence of CD38 expression suggests that these B cells have lower levels of CD38, which is involved in various B cell functions, including activation and differentiation.

The term "naive" implies that these B cells have not yet encountered and been activated by antigens. They are considered to be in an immature state and are ready to respond to new antigens when encountered.

The term "(% Pos of B)" likely refers to the percentage of these naive B cells within the total population of B cells in a given sample or context. The exact percentage can vary depending on the individual and the specific experimental conditions.

What does it mean if your CD19+CD27-CD21-CD38- (% Pos of B) result is too high?

Elevated CD19+CD27-CD21-CD38- B cells, often referred to as "atypical B cells," can have various implications depending on the context. These cells are part of the B-cell population and are characterized by the absence of CD27, CD21, and CD38 markers.

  1. Infection and Immune Response: Elevated levels of atypical B cells can sometimes indicate an ongoing immune response to infections or diseases. These cells may be mobilized to help combat pathogens.

  2. Autoimmune Disorders: Atypical B cells have been associated with autoimmune disorders, such as common variable immune deficiency (CVID). In CVID, the presence of CD19+CD27-CD21-CD38- B cells is one of the diagnostic criteria.

  3. Lymphoma: In some cases, an increase in these atypical B cells may also be observed in lymphoma affecting B cells.

Note: It's crucial to interpret these results in the context of your specific medical history and symptoms. Elevated levels of these cells alone do not provide a definitive diagnosis but may signal the need for further evaluation by a healthcare professional. Discuss these results with your doctor to determine the appropriate follow-up and any necessary diagnostic tests or treatments.

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