abnormal T cell differentiation MGI:2173605 MP:0001821 MP:0001822 MP:0002145 MP:0002431 MP:0002489 MPheno.ontology abnormal T cell development abnormal T cell maturation abnormal T cell morphology/development abnormal T lymphocyte development abnormal T-cell development abnormal T-cell maturation abnormal lymphoid development/ T lymphocyte defects abnormal thymocyte development atypical production of or inability to produce mature T cells, and/or accumulation of T cell precursors immune system: lymphoid development/ T lymphocyte defects abnormal lymphopoiesis abnormal T cell morphology