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RESUMEN Este reporte de caso describe la resección quirúrgica exitosa de un condroma de gran tamaño localizado en las dos últimas costillas y pared abdominal craneal izquierda de un canino, usando una malla de polipropileno, omento y avance del diafragma. Se discute la técnica quirúrgica y los materiales utilizados en el procedimiento, así como la evolución posquirúrgica del paciente. ABSTRACT This case report describes the successful surgical resection of a large chondroma located in the last two ribs and left cranial abdominal wall of a dog, using a polypropylene mesh, omentum and diaphragm advance. The surgical technique and the materials used in the procedure, as well as the postoperative outcome, are discussed.

Background Aseptic loosening due to bone remodelling processes after total hip replacement is one common cause for revision surgery. In human medicine, dual-energy X-ray absorptiometry (DEXA) is the gold standard for quantitative evaluation of bone mineral density, whereas in veterinary medicine conventional radiography is used for follow-up studies. Recently, a method has been described using digital X-ray images for quantitative assessment of grey scale values of bone contrast. Therefore, the aim of the present study was to evaluate the correlation of bone mineral density (BMD) measured by DEXA with grey scale values (GV) measured in digital X-ray images (RX50, RX66) ex vivo. Results The measured GV in the chosen X-ray settings showed on average a good correlation (r = 0.61) to the measured BMD with DEXA. Correlation between the two X-ray settings was very good (r = 0.81). For comparisons among regions of interests (ROIs) a difference of 8.2% was found to be statistically significant, whereas in the case of RX50 and RX66 differences of 5.3% and 4.1% were found to be statistically significant. Conclusions Results indicate that measuring absolute changes in bone mineral density might be possible using digital radiography. Not all significant differences between ROIs detectable with DEXA can be displayed in the X-ray images because of the lower sensitivity of the radiographs. However, direct comparison of grey scale values of the periprosthetic femur in one individual patient during the follow-up period, in order to predict bone remodelling processes, should be possible, but with a lesser sensitivity than with DEXA. It is important that the same X-ray settings are chosen for each patient for follow-up studies. Electronic supplementary material The online version of this article (doi:10.1186/s12917-017-1047-y) contains supplementary material, which is available to authorized users.

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