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Case Reports in Orthopedics
Volume 2015, Article ID 591509, 4 pages
http://dx.doi.org/10.1155/2015/591509
Case Report

Fracture of the Modular Neck in Total Hip Arthroplasty

Orthopaedic Surgery Department, Vall d’Hebron Hospital, 08035 Barcelona, Spain

Received 31 January 2015; Revised 11 June 2015; Accepted 16 June 2015

Academic Editor: Ali F. Ozer

Copyright © 2015 A. Hernandez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Modularity of the components in total hip arthroplasty has had an increase in popularity in the last decades. We present the case of a 53-year-old man with a history of avascular necrosis of the femoral head due to a hypophyseal adenoma. A total hip modular arthroplasty was implanted. Three and a half years after the surgery the patient attended the emergency room due to acute left hip pain with no prior traumatism. Radiological examination confirmed a fracture of the modular neck. A revision surgery was performed finding an important pseudotumoral well-organized periprosthetic tissue reaction. Through an extended trochanteric osteotomy the femoral component was removed, and a straight-stem revision prosthesis implanted. There are several potential advantages when using modularity in total hip arthroplasty that surgeons may benefit from, but complications have arisen and must be addressed. Various circumstances such as large femoral head with a long varus neck, corrosion, patient’s BMI, and activity level may participate in creating the necessary environment for fatigue failure of the implant.