Based on CT results it's literally indeterminate. You need further imaging which will likely happen rather quickly.
Potential Renal neoplastyWent to er for massive dehydration and what I thought was a intestinal blockage. That issue resolved itself but during CT scan for blockages, etc, noticed something on my kidney."Indeterminate lesion in the lower pole of the left kidney measuring 1.7 x 1.5 cm. This is suspicious for a possible renal neoplasm. A follow-up non emergent dedicated pre and post-contrast renal CT would be recommended to further evaluate."Not asking for medical advice, going to get it further checked asap, but anyone with experience here - how concerned should I be? It's the weekend and I can't call pcp and I'm trying to keep my wife from panicking, honestly. The er doc seemed fairly concerned.