Unclassified MR arthrography pattern evaluation in patients with episodes of recurrent antero-inferior shoulder dislocation.
OBJECTIVE
To evaluate prospectively the incidence of unclassifiable MR arthrography patterns of glenoid anterior-inferior labrum lesions, in patients with at least two episodes of recurrent antero-inferior shoulder dislocation.


METHODS
The MR shoulder Arthrography images of 36 patients, with at least two episodes of recurrent antero-inferior dislocation, were prospectively evaluated, during a period between November 2015 and Mai 2016. All patients were contacted after 6 months of the MR arthrography to evaluate their course of treatment. The MR arthrography images were analyzed by two radiologists, respectively with 5 and 15 years of experience in musculoskeletal radiology.


RESULTS
36 cases of unclassifiable MR arthrography pattern of the anterior-inferior glenoid labrum were evaluated: in 13 out 36 cases (36.1%), the glenoid labrum has been described as "oedematous and swollen"; in 19 out 36 cases (52.8%), it has been described as "smooth" (not hypoplastic); in 4 out 36 cases (11.1%), it has been described as degenerated.


CONCLUSIONS
The unclassifiable MR arthrography patterns of fibrocartilage glenoid lesions after episodes of recurrent antero-inferior dislocation are commons. The unclassifiable MR arthrography patterns require a careful consideration, in order to improve the diagnostic and therapeutic multidisciplinary approach.
Department of Radiology and Nuclear Medicine, Centre Henri Becquerel, Rue D'Amiens, 76000, Rouen, France. lukas_red@hotmail.it.
Luca
L
Saba
Department of Radiology, Parma Hospital, Via Gramsci 14, 43126, Parma, Italy.
Massimo
M
De Filippo
D000293:Adolescent; D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D006801:Humans; D015994:Incidence; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011446:Prospective Studies; D012008:Recurrence; D012783:Shoulder Dislocation / Q000145:classification / Q000000981:diagnostic imaging* / Q000453:epidemiology
D003287:Contrast Media
Glenoid labrum lesion; MR arthrography; Unclassified pattern