What does TdT stain for?

Abstract. Terminal deoxynucleotidyl transferase (TdT) is a nuclear protein widely used as a marker for the diagnosis and classification of acute leukemia. The usual methods for detecting TdT require smears, imprints, or cryostat sections of unfixed tissue.

What is TdT a marker for?

TdT is an oligoclonal marker characterizing several populations of undifferentiated or poorly differentiated blasts that tend to develop towards or along the lymphoid pathway. Together with specific immunological markers, this enzyme is useful to define the particular type of leukemic cells.

Is ALL TdT positive?

The expression of the enzyme marker terminal deoxynucleotidyl transferase (TdT) was examined by immunofluorescence assay in the cells from 333 cases with various types and subtypes of leukemia or lymphoma. More than 90% of cALL and T-ALL, 70% of Null-ALL and 80% of pre-B-ALL were TdT-positive.

What does TdT negative mean?

Terminal deoxynucleotidyl transferase (TdT)-negative T-cell lymphoblastic lymphoma is a variant of T-cell lymphoblastic lymphoma/T-cell lymphoblastic leukaemia. TdT is a marker of immaturity expressed in 90%–95% cases of lymphoblastic lymphoma and useful in differentiating it from other mature lymphomas/leukaemias.

What is the meaning of TdT?

Definitions of TDT. (astronomy) a measure of time defined by Earth’s orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth’s motions. synonyms: TT, ephemeris time, terrestrial dynamical time, terrestrial time. type of: time unit, unit of time.

Is TdT positive in AML?

Nuclear terminal deoxynucleotidyl transferase (TdT) expression is reported to be positive in approximately 50% of AML-M0 cases. No specific chromosomal abnormalities have been associated with AML-M0.

What is the full form of TdT?

Terminal deoxynucleotidyl transferase (TdT), also known as DNA nucleotidylexotransferase (DNTT) or terminal transferase, is a specialized DNA polymerase expressed in immature, pre-B, pre-T lymphoid cells, and acute lymphoblastic leukemia/lymphoma cells.

What is PAs in medical terms?

Physician Assistants (PAs) are Advanced Practice Providers (APPs) who work under the supervision of a physician to treat patients in a wide variety of healthcare settings – including hospitals and doctors’ offices, urgent care and rehabilitation facilities, and more.

What does TGT stand for?


Acronym Definition
TGT Target
TGT Trained Graduate Teacher (India)
TGT Target Corp (stock symbol)
TGT The Grand Tour (TV series)

Which leukemia is TdT positive?

Abstract. Terminal deoxynucleotidyl transferase (TdT) is a biochemical marker for acute lymphoblastic leukemia (ALL). In studies of ALL at diagnosis, there are usually greater than 40% TdT-positive cells by indirect immunofluorescence, whereas acute myeloblastic leukemia (AML) shows less than 1% TdT-positive cells.

Where is TdT expressed?

TdT is expressed mostly in the primary lymphoid organs, like the thymus and bone marrow.