Reactions Weekly

, Volume 1747, Issue 1, pp 249–249 | Cite as

Risedronic acid

Atypical incomplete femoral neck fracture: 2 case reports
Case report
Author Information

An event is serious (based on the ICH definition) when the patient outcome is:

  • * death

  • * life-threatening

  • * hospitalisation

  • * disability

  • * congenital anomaly

  • * other medically important event

In a case report, two women were described [exact ages at the time of reactions onsets not stated], who developed atypical incomplete femoral neck fracture during treatment with risedronic acid for osteoporosis [routes, dosages and duration of treatments to reactions onset not stated].

Case 1: A woman, aged 68 years, was hospitalised with a 3-day history of right hip pain. She had no history of trauma. Four years prior, she had underwent bipolar hemiarthroplasty due to a left femoral neck fracture. During current admission, X-ray showed a linear fracture of the lateral side of the right femoral neckwith a Pauwel angle of approximately 63.6°. No history of repeated stress was noted and her pre-injury Harris hip score (HHS) was 94 points. Four years prior, the bone mineral density...


  1. Suh YS, et al. Atypical incomplete femoral neck fracture in patients taking long-term bisphosphonate: Case report, a report of 2 cases. Medicine 98: e14701, No. 9, Mar 2019. Available from: URL: - South Korea

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© Springer International Publishing AG 2019

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