Background: Lameness is one of the main causes of economic losses in sheep breeding, especially in the distal region of the limbs. Poor sanitation management, especially in terms of hygiene conditions and the introduction of animals without previous preventive care, is an important predisposing factor in sheep flocks. Interdigital phlegmon (foot rot) is a bacterial disease that causes pain, heat, edema, hyperemia in the region, and can lead to secondary processes such as osteomyelitis. This case report describes the use of gamithromycin for the treatment of osteomyelitis secondary to foot rot in a sheep.Case: An Ile-de-France ewe exhibiting signs of lameness, pain, heat, hyperemia and edema in the four digits was treated at the Veterinary Hospital of UNIPAMPA. The lesions were characterized by interdigital phlegmon, commonly known as foot rot, and the right thoracic limb was more affected, exuding a foul odor and purulent secretion. The affected limbs were treated topically with an antiseptic solution. The lesions healed completely except for the right thoracic limb, whose clinical condition worsened. Osteitis was suspected, and was confirmed by radiographic evaluation of the region. Treatment with ceftiofur was introduced, but proved to be ineffective. Nevertheless, the lesion was found to have worsened, and a new X-ray evaluation was made, which revealed dislocation of the distal phalanx as well as involvement of the middle and proximal phalanges. Thus, we decided to perform chemical arthrodesis of the distal interphalangeal joint. Before beginning this procedure, contrast X-rays were taken that revealed the development of a fistulous pathway connecting the distal interphalangeal joint to the proximal interphalangeal joint, which precluded this procedure. In view of the worsening of the condition, amputation of the distal and middle phalanges was performed, as well as scraping of the distal edge of the proximal phalanx. In the postoperative period, ceftiofur was used as antibiotic therapy and flunixin meglumine as analgesic, in addition to daily dressings with topical iodine. After this procedure, there was no improvement in lameness and the radiographic images showed worsening of the clinical condition. At this time, the antimicrobial therapy was replaced with tylosin. After beginning treatment with this antimicrobial, there was a slight decrease in lameness, but a fistulous pathway with purulent secretion was formed in the region corresponding to the distal portion of the first phalanx, as well as an increase in the bone lesion, which was observed radiographically. Due to the ineffectiveness of the drug therapy, it was replaced by gamithromycin, which was applied three times. After beginning this treatment, lameness receded and the wound stopped producing purulent secretion, and at the end of the applications of this active ingredient, there was complete resolution of lameness and improvement of the radiographic signs of the animal of this case report.Discussion: Antimicrobial therapy is an important factor in the treatment of interdigital phlegmon and of osteomyelitis, and should be performed properly using broad-spectrum antibiotics. In the case reported here, although antibiotics with those characteristics were used, the active ingredient had to be changed more than once. In this particular case, there was an improvement in the lameness and the wound, and in the radiographic signs of the proximal phalanx, only after the application of gamithromycin. Therefore, this drug can be considered as an alternative for the treatment of osteomyelitis in ruminants, especially in cases unresponsive to treatment with other antibiotics.

RESUMO.O condrossarcoma é uma neoplasia óssea com características malignas, que se desenvolve a partir dos tecidos cartilaginosos, classificado na categoria dos sarcomas, está entre os três tumores que mais acometem a região pélvica dos cães. O objetivo deste relato é descrever o caso de um condrossarcoma localizado na articulação sacro-ilíaca direita num paciente canino, fêmea, de 8 anos de idade, da raça Pastor Alemão. Salientando a importância do exame radiográfico na conclusão diagnóstica, ressaltando que o exame histopatológico é o exame de predileção para o diagnóstico definitivo desta afecção. Palavras chave: Neoplasia, pelve, tecidos cartilaginososChondrosarcoma evolution of sacral joint -iliac in a dog: Case report ABSTRACT. Chondrosarcoma is a malignant neoplasm of bone that develops from the cartilaginous tissues, classified in the category of sarcomas, among the three tumors that most affect the pelvic region of dogs. The objective of this report was to describe the case of a chondrosarcoma located in the right sacroiliac joint in an 8-year-old female canine patient of the German shepherd breed. In this way, we emphasize the importance of the radiographic examination in the diagnostic conclusion, emphasizing that the histopathological examination is the examination of predilection for the definitive diagnosis of this affection. Keywords: Neoplasia, pelvis, cartilaginous tissuesEvolución de condrosarcoma en articulación sacroilíaca en canino: Reporte de un caso RESUMEN. El condrosarcoma es una neoplasia ósea con características malignas, que se desarrolla a partir de los tejidos cartilaginosos, clasificado en la categoría de los sarcomas, está entre los tres tumores que más afectan la región pélvica de los perros. El objetivo de este relato es describir el caso de un condrosarcoma localizado en la articulación sacroilíaca derecha en un paciente canino, hembra, de 8 años de edad, de la raza Pastor Alemán. Destacando la importancia del examen radiográfico en la conclusión diagnóstica, resaltando que el examen histopatológico es el examen predilecto para el diagnóstico definitivo de esta afección.

Tracheal avulsion is a condition seen in small animals and occurs as a result of a traumatic incident to the cervical and/or thoracic regions. The aim of this study is to report a case of tracheal avulsion in a cat using imaging examinations for diagnostic investigation. In this report, we examined an eight-month-old male, cat of undefined breed, diagnosed with tracheal avulsion using complementary imaging tests. This diagnosis was confirmed with post-mortem examination. Radiographic examination of the patient’s thorax and a tracheoscopy were performed. These examinations revealed complete discontinuity of the tracheal circumference, the presence of focal and circumscribed dilation of the tracheal lumen and stenosis. The patient quickly died without clinical and surgical intervention. Macroscopic analysis revealed a tracheal diverticulum confirming the findings of the imaging tests. The use of radiographic examinations in conjunction with tracheoscopy was effective at diagnosing this condition.

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