Diagnostic Confirmation--Hematopoietic, NOS: Is a multiple myeloma diagnosed by an FNA of the lumbar spine (or any other non-bone marrow location) a diagnostic confirmation 1 or 2? See Description.
Date of diagnosis/Ambiguous terminology--Cervix Uteri: Is the date of diagnosis of a cervical pap smear done in December 2017, that states high-grade squamous intraepithelial lesion with features suspicious for invasion, followed by a cervical biopsy in 2018 positive for squamous cell carcinoma, in 2017? Is the ambiguous term used in the cytology in 2017 (suspicious for invasion) to determine diagnosis as the SEER manual states to use the ambiguous cytology as the date of diagnosis if confirmed later.
Date of diagnosis--Diagnostic confirmation: How are the diagnosis date and diagnostic confirmation coded when the pathology (needle biopsy followed by resection) reports GIST, NOS and the physician subsequently states this is a malignant GIST and treats the patient for a malignancy? See Discussion.
Date of Diagnosis--Colon: If a patient has a positive Cologuard test, is the date of diagnosis the date of the cologuard test or the date of the biopsy?
Date of Diagnosis--Brain and CNS: How is the Date of Diagnosis coded when an MRI clinically diagnoses a borderline brain tumor on 4/4/2020, but the subsequent biopsy pathologically diagnoses a malignant brain tumor on 5/20/2020? See Discussion.
Chemotherapy: Should radiosensitizing chemotherapy agents (i.e., drugs typically coded as treatment for cancer) be coded as treatment when they are given in combination with radiation therapy with the intention of enhancing that treatment? See discussion.
Chemotherapy/Neoadjuvant treatment: Should neoadjuvant chemotherapy be coded for an incidental second primary discovered at the time of surgery? If so, how is the diagnosis date coded? See Discussion.
Casefinding--Heme & Lymphoid Neoplasms: Is the 2010 casefinding code of 289.6 (Familial Polycythemia) addressed anywhere in the Hematopoietic Database? See Discussion.