Epidemiology
A benign lesion of older adults, characteristically found in the posterior chest wall beneath the shoulder blade. Its typical location beneath the shoulder blade allows it to be recognized on imaging and avoids unnecessary biopsies when the picture is classic.
Basic features
It can be bilateral and may cause a sense of the shoulder blade catching, discomfort with movement, or a poorly defined deep mass.
Usual treatment
Observation is enough if it is typical and mild; surgical removal (resection) is reserved for significant pain or functional limitation.
Outcomes and prognosis
The outlook is excellent; many typical lesions never need surgery, and after resection the usual problem is a transient seroma at the operated site rather than recurrence.