SEER Inquiry System - Search

Primary site/Histology: Are the 2018 ICD-O Histology Update topography codes intended to specify the most common sites for these new codes and can the histology be coded if they occur in other sites? See Discussion.

Primary Site/In Situ: How is primary site coded for an in situ carcinoma arising in a mucinous cystadenoma with ovarian stroma (focal) located in the right lobe of the liver? See discussion.

Primary site/MP/H Rules/Histology: What is the appropriate site and histology code for a tumor described as a "Large mass In suprasellar cistern encroaching into sphenoid & ethmoid sinuses", with the pathology described as "INI-1 deficient sinonasal undifferentiated carcinoma"? Of note, this patient has a history of a pituitary adenoma, resected overseas a few months prior to this diagnosis.

Primary Site/Sarcoma--Breast: How should the primary site and stage be coded for osteosarcoma of breast? Is C509 correct or should the code be a different primary site? When assigning C509, the Collaborative Stage (CS) still pertains to breast cancer and AJCC stages it as a breast cancer and not as a sarcoma.

Primary Site/Surgery of Primary Site--Lymphoma: What codes are used in these fields when both regional lymph nodes and an extra-nodal site are involved with lymphoma and there is not a clear statement from the clinician as to the primary site? See discussion.

Primary site/Unknown and ill-defined site--Melanoma: What is the primary site for a case of metastatic melanoma with an unknown primary site? See Discussion.

Primary site: How is this field coded for a malignant spindle cell neoplasm in a subcutaneous mass of the right knee? See Description.

Primary Site: How should primary site be coded when there is an invasive tumor in one subsite and an in situ tumor in another subsite of the breast? See Discussion.

Primary site: Is C720 the correct primary site for a diagnosis of a paraspinal neuroblastoma on autopsy in a nine month old with Noonan syndrome? See Discussion.

Primary site: Is there a physician priority list for coding primary site?  For example, the surgeon states during a pancreatectomy that the primary is in body while the pathologist states in their synopitc report that primary is neck; neither is in agreement, or neither is available for confirmation.