Kidney or renal biopsy is the excision of a tissue sample from the kidney for microscopic analysis to determine cell morphology and the presence of tissue abnormalities. This test assists in confirming a diagnosis of cancer found on x-ray or ultrasound or to diagnose certain inflammatory or immunological conditions.
The Three Sisters are a subgroup of the Cascade volcanoes west of Bend in central Oregon, consisting officially of North, Middle, and South Sisters (all approximately 10,000 ft high), though Mt. Bachelor (aka Bachelor Butte) & Broken Top are also in the immediate vicinity.
Between San Diego and that pie town Julian in the mountains lies Three Sisters Waterfall Hike. From the trail-head, it is only a ~4 mile out and back trek, but it is quite challenging along the way. There is a steep rock wall you need to descend (and then ascend on the way back) that's easiest to crab walk, so...