Name

ICD-O-1 Morphology

9820/3: Lymphoid, leukemia, NOS
9822/3: Subacute lymphoid leukemia
9850/3: Lymphosarcoma cell leukemia
Effective 1978 - 1991

ICD-O-2 Morphology

9820/3: Lymphoid, leukemia, NOS
9822/3: Subacute lymphoid leukemia
9850/3: Lymphosarcoma cell leukemia
Effective 1992 - 2000

ICD-O-3 Morphology

9820/3: Lymphoid, leukemia, NOS
Effective 2001 and later

Reportable

for cases diagnosed 1978 and later

Primary Site(s)

C421
Primary site must be bone marrow (C421)

Grade

Not Applicable

Module Rule

None

Alternate Names

Lymphatic leukemia, NOS [OBS]
Lymphosarcoma cell leukemia [OBS]
Subacute lymphatic leukemia [OBS]
Subacute lymphocytic leukemia [OBS]
Subacute lymphoid leukemia [OBS]

Definition

Non-specific general term for lymphoid leukemia (unknown if acute or chronic), for which cell typing (B or T) has not been done or information not available.

Abstractor Notes

This term is seldom used and is not included in the new classification of hematopoietic and lymphoid neoplasms. There are a number of codes for lymphocytic and lymphoblastic leukemias that would be currently used to describe a neoplasm of lymphoid lineage.

Definitive Diagnostic Methods

Bone marrow biopsy
Peripheral blood smear

Genetics Data

None

Immunophenotyping

None

Treatments

None

Transformations to

There are no known transformations

Transformations from

There are no known transformations

Corresponding ICD-9 Codes

204.9 Unspecified lymphoid leukemia

Corresponding ICD-10 Codes

C91.9 Lymphoid leukemia, NOS

Corresponding ICD-10-CM Codes (U.S. only)

C91.9 Lymphoid leukemia, NOS (effective October 01, 2015)

Signs and Symptoms

None

Diagnostic Exams

None

Progression and Transformation

None

Epidemiology and Mortality

None

Sources

International Classification of Diseases for Oncology, Third Edition, First Revision. Geneva: World Health Organization, 2013.
Section: ICD-O-3.1 (2011) Morphological Codes
Pages: http://codes.iarc.fr/codegroup/2

National Cancer Institute
Section: General Information About Acute Lymphoid Leukemia
Pages: https://www.cancer.gov/types/leukemia/patient/adult-all-treatment-pdq
Glossary