P. J. B. Hallam’s research while affiliated with West Middlesex University Hospital and other places

We have investigated nine patients with cemented Furlong (JRI, London, UK) titanium hip replacements who presented with early pain despite a well-fixed, aseptic prosthesis. All were followed up clinically and radiologically at regular intervals. Pain was located in the thigh and was worse at night. Radiographs showed cortical hypertrophy of the femur around the tip of the stem. Eight of the nine patients subsequently required single-stage revision using an uncemented prosthesis, which relieved the pain. At revision, the pH of the tip of the stem was found to be highly acidic with macroscopic evidence of corrosion consisting of multiple layers of titanium oxides when studied by X-ray dispersive analysis. Cemented titanium implants have a potential for crevice corrosion leading to cortical hypertrophy and intractable pain.

We have investigated nine patients with cemented Furlong (JRI, London, UK) titanium hip replacements who presented with early pain despite a well-fixed, aseptic prosthesis. All were followed up clinically and radiologically at regular intervals. Pain was located in the thigh and was worse at night. Radiographs showed cortical hypertrophy of the femur around the tip of the stem. Eight of the nine patients subsequently required single-stage revision using an uncemented prosthesis, which relieved the pain. At revision, the pH of the tip of the stem was found to be highly acidic with macroscopic evidence of corrosion consisting of multiple layers of titanium oxides when studied by X-ray dispersive analysis. Cemented titanium implants have a potential for crevice corrosion leading to cortical hypertrophy and intractable pain.

To investigate the sources of delay in diagnosis and determine if there was a similar diagnostic error rate as found by the Musculoskeletal Tumour Society, which subsequently altered patients' management and affected outcome. A prospective review of 100 consecutive patients referred to our institution analysed causes for delay in referral and whether prior investigations or procedures had complicated further management. Patients were symptomatic for 14.8 months (range, 0-26 months) prior to consultation with their GP. A further 13.5 months (range, 0.5-120 months) elapsed before referral by the local hospital (94) or GP (6) to the bone and soft tissue service. A significant delay in referral of more than a month occurred in 72 patients. Those patients with malignant disease were symptomatic for 7.6 months (range, 0.5-11 months) prior to seeking medical advice with a further 7.5 months (range, 0-13 months) elapsing prior to onward referral at their local hospital. From the study group, 63 patients were subjected to complex imaging studies (bone scan, CT, MRI) prior to referral; 34 biopsies or surgery were performed in 34 cases by referring teams, 16 of which complicated subsequent management. If a high suspicion of a soft tissue or bone tumour is suspected from the history, examination and plain radiograph, then early referral to a specialist centre is recommended where relevant, high-quality investigations can be arranged in a short time leading to a planned biopsy, confirmation of diagnosis and definitive treatment at an earlier stage.

Fractures of the anterior intercondylar eminence in children are relatively uncommon. There is considerable debate as to the best treatment of displaced fractures, but most methods described in the literature involve an open procedure combined with some form of fixation. Using human anatomical dissections, we have shown that the transverse meniscal ligament can become incarcerated within the fracture and act as a block to reduction. We describe an arthroscopic technique which requires no fixation device and report the results of its use in eight displaced fractures. This method gives reliable results and offers the advantage of less potential morbidity.

Fractures of the anterior intercondylar eminence in children are relatively uncommon. There is considerable debate as to the best treatment of displaced fractures, but most methods described in the literature involve an open procedure combined with some form of fixation. Using human anatomical dissections, we have shown that the transverse meniscal ligament can become incarcerated within the fracture and act as a block to reduction. We describe an arthroscopic technique which requires no fixation device and report the results of its use in eight displaced fractures. This method gives reliable results and offers the advantage of less potential morbidity.