Multiplicity Counter-Breast: The general instructions say to ignore separate microscopic foci when determining when to use the single tumor or multiple tumor modules. Do these instructions apply if sizes are given for the foci? See Discussion.
Multiplicity Counter/CS Tumor Size: The Multiplicity Counter rule 6c states "Use code 99 when the tumor is described as diffuse". Is code 99 used in all circumstances when tumor size is coded to 998? See Discussion.
Multiplicity Counter/Date Multiple Tumors--Bladder: How are these fields coded when multiple tumors were present at the time of diagnosis and another tumor diagnosed a year later is determined to be the same primary? See Discussion.
Multiplicity Counter/Date of Multiple Tumors/CS Tumor Size--Lung: How are these fields to be coded when work-up of a malignancy spans a couple of months and reveals developing nodules? See Discussion.
Multiplicity Counter/Type of Multiple Tumors--Breast: How are these data items coded for a single breast primary composed of both in situ and invasive disease when measurements are provided for both the invasive and in insitu components? See Discussion.
Multiplicity Counter/Type of Multiple Tumors--Breast: How are these fields coded when a patient underwent a lumpectomy demonstrating two measured foci of invasive ductal carcinoma (1.5 cm and 3 mm) and "focally seen" in situ ductal carcinoma (DCIS) followed by a re-excision that is positive for 1.5 mm focus of residual invasive carcinoma? See Discussion.
Multiplicity Counter/Type of Multiple Tumors--Breast: How should these fields be coded when path shows a 1.2 cm infiltrating carcinoma with lobular features and several foci of infiltrating lobular carcinoma [7 foci described as multifocal], 1 large focus, and numerous foci of LCIS and CIS with lobular and ductal features? Should we count the foci or separate tumor nodules, ignore them, or code unknown values for these fields? See Discussion.
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