Background. This review is intended to summarize the risk factors, classification, diagnosis, and treatment of heterotopic ossification (HO) of previously published studies. Results. Heterotopic ossification is a common complication of total hip arthroplasty. Its prevalence is not the same in all of the patient groups. Frequency of HO varies from 15 to 90%. Hip ankylosis, male gender, and previous history of HO are said to be risk factors with a significant level. Diagnosis is based on a single AP radiograph: the Brooker classification that divides HO into four grades is the most commonly used. The confirmation test that can be used is a bone scan. A great amount of bone metabolic turnover markers have been tested, but none of them seems to be relevant in case of prevention or diagnosis of HO. The most effective prophylactic treatment is radiotherapy or administration of nonsteroidal anti-inflammatory drugs. Over the years a lot of different RT protocols have been tested. Nowadays the most often used regimen is 7 Gy given postoperatively in a single dose. The most commonly prescribed drug in prophylaxis of HO is indomethacin. Also, the efficacy of ibuprofen and diclofenac was proven. Recently researchers focused on selective COX-2 inhibitors. They appear to be as effective as nonselective NSAIDs having less side effects. The one and only treatment of HO is a revision arthroplasty.

Patient: Male, 52-year-old Final Diagnosis: Osteogenesis imperfecta • pelvic ring fracture • peritrochanteric fracture Symptoms: Limited mobility • pain Medication: — Clinical Procedure: — Specialty: Surgery Objective: Congenital defects/diseases Background: Osteogensis imperfecta (OI) is a rare disorder associated with brittle bones, skeletal deformities, short stature, and conductive hearing loss. It is caused by mutations in genes encoding collagen type I production and is associated with multiple fractures occurring during a patient’s lifetime. Atypical fractures can occur without a history of previous injury or diagnosis. Case Report: A 52-year old man sustained a fall from his own height. He experienced pelvic pain but could bear weight. He was referred to the hospital by his primary care physician and was admitted to the Orthopedic Department with a pelvic ring fracture. We performed open reduction and internal fixation with a reconstruction plate via an intrapelvic approach. At 12 weeks after discharge, he sustained a peritrochanteric fracture. It was surgically treated with a dynamic hip screw. The patient commenced weight-bearing 20 weeks after the initial procedure. Bone union was achieved clinically and radiographically. He did not have any revision procedures. At the time of this report, 5 years after the described period, he felt no discomfort around the hips, sacroiliac joints, and pubic symphysis. Conclusions: OI poses a difficult treatment challenge, but, achieving a good clinical and functional result is possible with a precise surgical technique and meticulous preoperative planning. Clinicians should always consider the possibility of a simultaneous fracture occurrence in different parts of the body. Some patients present without a previous diagnosis, and we should always have some suspicion of OI in cases of young patients presenting with low-energy fractures.

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Remitting seronegative symmetrical synovitis with pitting edema (RS3PE) is a rare form of inflammatory arthritis, most often affecting elderly individuals and characterized by polyarthritis most commonly affecting the hands and feet in a symmetric fashion, associated with pitting edema on the dorsum of the hands (and occasionally the feet). Symptoms often spontaneously remit and are usually very responsive to low dose glucocorticoids. RS3PE has been considered as forme fruste of polymyalgia rheumatica. It can also occur as a paraneoplastic syndrome and can sometimes be a harbinger of malignancy. This article describes a case of RS3PE, followed by a review of literature about this very intriguing rheumatologic disease.