MP/H Rules/Histology--Bladder: What rule and histology code apply when a TURB final diagnosis is small cell neuroendocrine carcinoma and high grade urothelial carcinoma? See Discussion.
First Course Therapy/Reason for No Surgery of Primary Site: What code should be used for Reason for No Surgery of Primary Site in 2020 in situations affected by the pandemic when abstracting all sites? See Discussion.
Solid Tumor Rules (2018)/Behavior--Brain and CNS: The Behavior coding instructions in the Non-Malignant Central Nervous System (CNS) Equivalent Terms and Definitions section refer to Table 1 for help coding behavior when the other priority order instructions do not apply; however, the behavior cannot be reasonably determined using Table 1 alone for all WHO Grade I neoplasms. Should an additional default, such as the ICD-O-3 or Tables 5 and 6, be used to determine behavior? See Discussion.
CS Tumor Size--Breast: Is the largest focus or the total area coded for tumor size in a patient presenting with "scattered foci of DCIS, largest focus measuring 0.6cm. DCIS spans a total area of 2.1cm."
CS Extension--Bladder: How would the following statements be coded for bladder extension -- Code 03 [inferred description of non-invasion] vs code 15 [invasive confined to subepithelial connective tissue]. See Discussion.
CS Eval--Lung: How is the CS Reg Nodes Eval field to be coded when the FNA of a paratracheal lymph node is positive for adenocarcinoma and the patient subsequently undergoes neoadjuvant chemoradiation therapy followed by an excision of multiple lymph node fragments that show adenocarcinoma? See Discussion.
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