Functional activity All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm. Morphology [Histology] Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes. Primary malignant neoplasms overlapping site boundaries A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned. Malignant neoplasm of ectopic tissue Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Category D49 classifies by site neoplasms of unspecified morphology and behavior. The term 'mass', unless otherwise stated, is not to be regarded as a neoplastic growth.
Includes:
'growth' NOS neoplasm NOS new growth NOS tumor NOS
Neoplasm of unspecified behavior of digestive system
Excludes 1:
neoplasm of unspecified behavior of margin of anus (D49.2) neoplasm of unspecified behavior of perianal skin (D49.2) neoplasm of unspecified behavior of skin of anus (D49.2)
Neoplasm of unspecified behavior of bone, soft tissue, and skin
Excludes 1:
neoplasm of unspecified behavior of anal canal (D49.0) neoplasm of unspecified behavior of anus NOS (D49.0) neoplasm of unspecified behavior of bone marrow (D49.89) neoplasm of unspecified behavior of cartilage of larynx (D49.1) neoplasm of unspecified behavior of cartilage of nose (D49.1) neoplasm of unspecified behavior of connective tissue of breast (D49.3) neoplasm of unspecified behavior of skin of genital organs (D49.59) neoplasm of unspecified behavior of vermilion border of lip (D49.0)
Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system
Excludes 1:
neoplasm of unspecified behavior of peripheral, sympathetic, and parasympathetic nerves and ganglia (D49.2)
D49.8
Neoplasm of unspecified behavior of other specified sites[+]
Excludes 1:
neoplasm of unspecified behavior of eyelid (skin) (D49.2) neoplasm of unspecified behavior of eyelid cartilage (D49.2) neoplasm of unspecified behavior of great vessels (D49.2) neoplasm of unspecified behavior of optic nerve (D49.7)