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M3

Abbreviation for:
third marginal coronary artery (see there)

FAB classification

French-American-British classification of acute leukemia Hematology A schema that divides acute leukemias into lymphoid–ALL or myeloid–AML cell lines; of childhood ALL, 70% are predominantly L1, 27% are L2, and 3% or less are L3 or Burkitt cell type, in adults with ALL, 30% are L1, 65% are L2, and 5% are L3
FAB classification, acute leukemias
Acute lymphocytic leukemia (ALL)
L1  Small monotonous lymphocytes
L2  Mixed L1- and L3-type lymphocytes
L3  Large homogeneous blast cells
Acute myeloid leukemia (AML)
M1  Myeloblasts without maturation
M2  Myeloblasts with maturation (best AML prognosis)
M3  Hypergranular promyelocytic leukemia (faggot cells)
M3V  Variant, microgranular promyelocytic leukemia
M4  Myelomonocytic leukocytes
M5  Monocytic, subtype
  a. Poorly differentiated monocytic leukemia
  b. Well differentiated monocytic leukemia
M6  Erythroleukemia/DiGuglielmo syndrome
M7  Megakaryocytic leukemia Pleomorphic undifferentiated cells with cytoplasmic blebs; myelofibrosis or ↑ BM reticulin; positive for platelet peroxidase antifactor VIII
References in periodicals archive ?
5: When X-1 passes to X-2 on the right side, M-3 has to slide over to cover the receiver, while D-3 must slide in to replace M-3 in the rectangle.
For more on Schedule M-3 disclosue and reportable transactions, see Notice 2006-6, IRB 2006-5.
While the new Schedule M-3 is currently required only for taxpayers filing Form 1120, the IRS and the Treasury Department anticipate analyzing and developing comparable schedules for Form 1065 (partnership returns), and Form 1120S (subchapter S corporation returns), as well as Forms 1120PC and 1120L (involving insurance companies).
For more information on Schedule M-3, visit www.irs.gov/newsroom/article/0,,id=124997,00.html.
Nolan emphasized that the Schedule M-3 is to be used as a "select and de-select" tool for future examinations.
Insurance companies: The Schedules M-3 planned for Form 1120PC, U.S.
A taxpayer that complies with the new Schedule M-3 will satisfy the requirements of disclosing significant book-tax differences for the purposes of the reportable transaction regulations.
Corporations required to complete Schedule M-3 will not have to complete Schedule M-1, "Reconciliation of Income (Loss) per Books With Income per Return." Other corporations will continue to complete only Schedule M-1, which consists of just 10 lines and occupies less than half of Page 4, Form 1120.
Based on a review of the Forms 8886, Reportable Transaction Disclosure Statement, and Schedules M-3 received during the 2005 filing season, the IRS and Treasury announced in Notice 2006-6 that the book-tax difference category of reportable transactions under Treas.
* Filing Schedule M-3 will satisfy tax shelter disclosure requirements for transactions with a significant book-tax difference.
Interchanges of M-3 would be located near the cities of Nankana Sahib, Samundri, Rajana, Pir Mahal, Darkana, Jaranwala, Mangatanwala, and Saigan.
TEI commends the IRS and Treasury Department for concluding that the Schedule M-3 supplies substantially all the information that IRS agents require in order to examine significant book-tax accounting differences.