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There are a number of diagnoses that are malignant and reportable but do not sound that way.

Atypical carcinoid
SETTLE, CASTLE
Rhabdoid tumor, NOS
Intratubular germ cell neoplasia
Epithelioid trophoblastic tumor

Mixed pineal tumor, transitional pineal tumor
Atypical teratoid/rhabdoid tumor
Pagetoid reticulosis
Generalized Langerhans cell histiocytosis
Agnogenic myeloid metaplasia
Acute progressive histiocytosis X
Heavy chain disease
Immunoproliferative small intestinal disease
Hypereosinophilic syndrome
Therapy-related myelodysplastic syndrome

Atypical carcinoid and typical carcinoid have different histology codes, and both have behavior codes of /3.

SETTLE is spindle epithelial tumor with thymus-like element.

CASTLE is carcinoma showing thymus-like element.

Rhabdoid tumor is one of the complex mixed and stromal neoplasms.

Intratubular germ cell neoplasia is an in situ term that you may recognize from the TNM staging of testicular cancer.

Epithelioid trophoblastic tumor is a new code in the hydatidiform mole series.

Mixed and transitional pineal tumors are in the CNS, as is atypical teratoid/rhabdoid tumor.

Pagetoid reticulosis is a synonym for mycosis fungoides.

Generalized Langerhans cell histiocytosis is predominantly a disease of childhood.

Agnogenic myeloid metaplasia is a term used in the U.S. as a synonym for myelosclerosis.

Acute progressive histiocytosis X is a specific type of Histiocytosis X. Histiocytosis X was a term proposed by Dr. Lichtenstein in 1952 to embrace three disorders characterized by accumulation of histiocytes in different tissues: eosinophilic granuloma, Hand-Schuller-Christian syndrome, and Letterer-Siwe disease.

Heavy chain disease and immunoproliferative small intestinal disease are rare tumors that were already in ICD-O-2.

Hypereosinophilic syndrome (9964/3) is a new term with a new code and is a chronic myeloproliferative disorder of the bone marrow (C42.1).

Therapy-related myelodysplastic syndrome (9987/3) is also a new term with a new code and also arises in the bone marrow (C42.1).

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