Humeral Lateral Epicondylitis Complicated by Hydroxyapatite Dihydrite Deposition Disease: A Case Report

ObjectiveThe aim of this case report is to differentiate the recovery timeline expected for patients with simple lateral epicondylitis from an abnormal recovery period, in which case an underlying condition should be suspected.Clinical featuresA 49-year-old woman presented to a chiropractic clinic with posterolateral right elbow pain. The history included chronic recurrent lateral elbow pain, followed by a traumatic event leading to sustained pain and disability.Intervention and outcomesFollowing a trial of conservative therapy including activity restrictions, soft tissue therapy, joint mobilizations, and therapeutic ultrasonography that led to no significant improvement, the patient was referred for diagnostic imaging that revealed hydroxyapatite dihydrite deposition disease.ConclusionThis report describes a case for which lateral epicondylitis symptoms failed to resolve because of an underlying condition (hydroxyapatite dihydrite deposition disease). This case emphasizes that primary care practitioners treating lateral epicondylitis should consider referral for further investigations when positive results are not achieved.