The alphabetic index is used to code topography
(anatomical
sites) and morphology (histological terms). The index
also includes selected tumor-like lesions and conditions.
Topography codes are identified by the letter C, the first
character of codes in Chapter II ICD-10. The prefix M
is used to identify morphology codes. The terms are listed
under both the noun and the adjective. For example, basophil
adeno-
carcinoma is listed under B for "basophil" and under
A for "adenocarcinoma, basophil."
Format and Use of Alphabetic Index
Table 11 shows the first column of terms in the alphabetic
index. Any word that appears as part of three or more
terms is in bold type (such as "Abdomen,"
"Abdominal," and "Abdominal
wall"), and the terms that include this word
are indented under it. Topographic (C) and Morphologic
terms (M) are not mixed under a single heading; there
is always a vertical space before and after each group.
The first lead term is "Abdomen." Since there
are more than three modifying terms, Abdomen is in bold
type. The "NOS" term is always listed first
under a heading in the index (rather than in alphabetic
order under N).
A vertical space separates the "Abdomen"
group and the next two terms containing the word "abdominal."
Since there are only two morphologic terms beginning
with "abdominal," they do not need a heading;
however the following four topography terms do have
a bold heading "Abdominal."
In the alphabetic index, a vertical space means:
1. a change from topographic to morphologic term(s)
or vice versa
2. the end of a group
Tumor-like lesions and conditions
At the bottom of the column in Table 11 , the alphabetic
index also includes certain tumor-like lesions and conditions
in their appropriate alphabetic order. These could be
confused with neoplasms: for example, they end in "oma"
or are premalignant conditions. No ICD-O morphology
code is given after the M-, only seven dashes (M-------),
because these conditions are not considered to be neoplasms.
|
|
Table 11. First
Column of
Alphabetic Index
|
|
-
A -
|
| |
Abdomen |
| C76.2 |
NOS |
| C47.4 |
autonomic
nervous system |
| C49.4 |
connective
tissue |
| C49.4 |
muscle |
| C47.4 |
peripheral
nerve |
| C44.5 |
skin |
| C49.4 |
subcutaneous
tissue |
|
|
| M-8822/1 |
Abdominal
desmoid |
| M-8822/1 |
Abdominal
fibromatosis |
|
|
|
Abdominal |
| C49.4 |
aorta |
| C15.2 |
esophagus |
| C77.2 |
lymph
node |
| C49.4 |
vena
cava |
|
|
|
Abdominal
wall |
| C76.2 |
NOS |
| C44.5 |
NOS
(carcinoma, melanoma,
nevus) |
| C49.4 |
NOS
(sarcoma, lipoma) |
| C49.4 |
adipose
tissue |
| C47.4 |
autonomic
nervous system |
| C49.4 |
connective
tissue |
| C49.4 |
fatty
tissue |
| C49.4 |
fibrous
tissue |
| C49.4 |
muscle |
| C47.4 |
peripheral
nerve |
| C49.4 |
skeletal
muscle |
| C44.5 |
skin |
| C49.4 |
soft
tissue |
| C49.4 |
subcutaneous
tissue |
| |
|
| C72.5 |
Abducens nerve |
|
|
| M-9871/3 |
Abnormal marrow
eosinophils, acute myeloid leukemia
with (includes all variants) |
| M-9871/3 |
Abnormal marrow
eosinophils, acute myelomonocytic leukemia
with (includes all variants) |
| M-8075/3 |
Acantholytic
squamous cell carcinoma |
| M------- |
Acanthoma,
clear cell (see SNOMED) |
| M------- |
Acanthosis
nigricans (see SNOMED) |
|
|
|
|
Instead, there is a note in parentheses (see SNOMED)
to refer the reader to the Systematized Nomenclature
of Medicine (2,3).
In ICD-O-1 and ICD-O-2, a SNOMED code was provided.
However, because at least two editions of SNOMED are
in current use and the codes differ slightly for these
non-neoplastic lesions and conditions, specific SNOMED
codes were omitted from ICD-O, Third Edition.
Lymphoma and Leukemia Listings
Lymphomas and leukemias are exceptions to the rule
of listing conditions under all parts of the terms.
The number of permutations and combinations in leukemia
and lymphoma terms is such that the index would have
been too long. There is only one list for "lymphoma,
malignant" and one for "leukemia."
|
