When my twin sister lived in my state, she went to the same rheumatologist I did at the time. Now she doesn't have one. She called yesterday, had been to the doctor about her back pain.
Sister: She did an x-ray. She says my spine pain is from lumbar scoliosis.
Me: But you've always had lumbar scoliosis.
Me: And isn't your pain in the SI joints and hip and not so much the lumbar spine?
Me: Does your pain feel muscular or like bone?
Sister: Very deep pain, in bone. [Me: recognizing severe sacroiliitis.]
Me: You told her you have a sister with spondyloarthropathy and other rheumatologic diagnoses?
Sister: Yes, but she doesn't think that matters since we're not identical. [Me to self: but we're still related and it's inheritable; we're the same age and grew up in the same environment.] And my alkaline phosphatase has been high for five years...