Source 1: WHO Class Tumors of the Eye
Notes: 4th edition
Reportability--Retina: Is a diagnosis of retinal astrocytoma reportable? See Discussion.
There is no specific ICD-O-3 code for a
retinal astrocytoma which resulted in abstractors assigning the malignant astrocytoma, NOS code. These lesions were previously called
retinal astrocytic hamartomas but we are seeing the new terminology more frequently.
Report retinal astrocytoma. The WHO Classification of Tumors of the Eye, 4th edition, lists astrocytoma, NOS as 9400/3 with astrocytic hamartoma of the retina as a synonym. You may receive a site/type edit (IF25) which can be overridden.
The changes in terminology, codes, etc. proposed in WHO 4th Ed Eye book were implemented for cases diagnosed 1/1/2018 forward. Apply this to retina astrocytomas and do not accession cases diagnosed with this histology prior to 1/1/2018.