Defective T-Cell Receptor Signaling

**Semantic type:** Laboratory or Test Result

**Definition:** An indication that T-cell receptor (TCR)-dependent signaling pathways in a immunologic sample are compromised. TCR signaling defects lead to impaired development of T-lymphocytes and are usually caused by deletion or loss of function mutations affecting one or more proteins involved in TCR-dependent signaling pathways, including the subunits of the TCR complex.

**Synonyms:** - Defective TCR Signaling - T Cell Receptor Signaling Defect - T Cell Receptor Signaling Defect - T-Cell Receptor Signaling Defect - TCR Signaling Defect