I had a largepilonidal cyst excised 2 yrs ago and fractured sternum prior. can either lead to spine-alignment/posture/gait/shoulder problems + pain?

Both certainly could: Both of these can cause posture, shoulder, back and/or gait problems. The pilonidal cyst likely had you sitting in funny ways to keep it from hurting. You might have even been walking funny as a result. Whatever impact fractured your sternum almost certainly affected you shoulder girdle and/or thoracic spin. You should seek out a do skilled in omm to help set you straight.

Maybe sternal fx: Excision of a pilonidal cyst would not be associated with the symptoms you describe. However, it takes great force to fracture the sternum. It may be that the episode that caused the sternal fracture also caused other musculoskeletal problems that have resulted in your current symptoms. I suggest consultation with an orthopedic surgeon or sports medicine specialist.

No for Pilo: Pilonidal disease cannot. The fracture sternum - the traums that caused that fracture may have had enough impact to cause something. But really, you should speak with your physician about this. Definitely pilonidal cannot.