I did manage to find this test: the Coracoid Pain Test.
It is a very simple test of The coracoid pain test is considered positive when the digital pressure on the coracoid area. The test is positive when the pressure evocates a more intensive pain with respect to other shoulder area
This new test purports excellent diagnostic accuracy (sensitivity = .99, specificity=.98). Sounds pretty good eh. Probably too good.
Unfortunately there is only one study and it appears quite flawed in that:
1. the study consisted of a series of people with a variety known diagnoses (case control) rather than a cohort of diagnostic uncertainty; and
2. the same clinician performed the reference standard testing and the diagnostic test so there was no blinding.
The reference standard consisted of a combination of:
Codmans 12 critieria foradhesive capsulitis
Shoulder stiffness
MRI
radiographs
So interesting test but I would interpret the accuracy with a bit of caution
Reference
Carbone, S., Gumina, S., Vestri, A. R., & Postacchini, R. (2010). Coracoid pain test: a new clinical sign of shoulder adhesive capsulitis. International Orthopaedics, 34(3), 385-388.SpringerLink - Journal Article