A man's wife is upset because when she hugs him with her hands on his left shoulder blade, "it feels creepy." This came on gradually after a recent severe left-sided rotator cuff tear. How long does it usually take to develop muscular atrophy with increased prominence of the scapular spine following a rotator cuff tear?

Following a severe rotator cuff tear, it typically takes around 2-3 months for muscular atrophy to develop with increased prominence of the scapular spine. This is due to disuse of the affected shoulder muscles leading to muscle wasting and changes in the bony structures around the shoulder blade. Over time, the lack of muscle activity causes the shoulder blade to become more prominent and noticeable, which can result in altered sensations during activities like hugging. The gradual onset of these changes aligns with the timeline provided in the question, where the wife started to feel discomfort in her husband's left shoulder blade after the recent severe rotator cuff tear.