#1: Solid Tumor Rules (2018, 2021)
#2: Multiple primaries
Source 1: 2018 Solid Tumor Rules
Notes: Urinary Sites, July 2019 Update
Solid Tumor Rules (2018)/Multiple primaries--Bladder. Would the metastatic diagnosis indicate a new primary? If the metastatic diagnosis indicates a new primary, would the primary site be C688 and date of diagnosis 11/14/18? See Discussion.
7/8/16 Urinary bladder, biopsy: Non-invasive low grade papillary urothelial carcinoma. Muscularis propria (detrusor muscle) is not identified.
9/2/16 Urinary bladder, bladder tumor, transurethral resection: High grade papillary urothelial carcinoma. No definite invasion identified. Muscularis propria (detrusor muscle) is identified and not involved by tumor.
1/7/17 A\S\Bladder: Noninvasive low grade papillary urothelial carcinoma. Granulomatous cystitis, consistent with BCG (Bacillus Calmette-Guerin) treatment. Lamina propria is not involved with tumor. Detrusor muscle is not identified.
4/4/17 Dome: Papillary urothelial carcinoma, low grade. No evidence of invasion. Muscularis propria is not present.
Patient is clearly followed for at least a year but no further information until 19 months later, 11/14/18, when biopsy of lung indicates metastatic disease.
11/14/18 Lung, right lower lobe, mass, biopsy: Metastatic urothelial carcinoma. Immunohistochemical analysis results (CK7 positive, CK20 focally positive, P63 positive, GATA3 positive, TTF1 negative and NAPSIN-A negative) support the diagnosis
Do not use the solid tumor rules to assess the 2018 diagnosis. See Note 1 on page 20 of the Urinary Sites Solid Tumor Rules, https://seer.cancer.gov/tools/solidtumor/Urinary_STM.pdf
The 2018 diagnosis proves that this patient had invasive bladder cancer. Change the behavior on the abstract to /3 and use text fields to record the details.