nice one, skadif. After looking at the x-rays I am wondering why the diagnose Wikipedia reference-linkfrozen shoulder was made in the first place.
I feel as with the diagnose of low back pain, sciatica and so on these diagnoses should be taken with a bucket of salt. What is evident on the X-rays is a long standing Osteo Arthritis. One could reason that a increase in tension around the shoulder could result in more friction, change in movement patterns and therefor increase of wear. But frozen shoulder is a self limiting syndrome lasting 2 years or so? And then the question should be will a period of 2 years of "abuse" result in such a wear? well I wonder with all builders and alike able to work for 10s of years. Maybe the diagnose had to be taken with a bucket of ....
Cheers