Publications by authors named "Hun Young Yoon"

Importance: Patients with arthritis and ruptured cruciate ligaments typically require surgery. Following surgery, it is necessary to improve joint function in early stage.

Objective: This study aimed to investigate the impact of intraoperative intra-articular injection of the ELHLD peptide (L-glutamyl-L-leucyl-L-histidyl-L-leucyl-L-aspartic acid) on postoperative stifle function in patients with medial patella luxation grade 3 and osteoarthritis grade 2 undergoing tibial plateau leveling osteotomy due to anterior cruciate ligament (ACL) rupture.

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  • The study investigates how different medications (heparin, aspirin, SNP) affect the risk of pulmonary thromboembolism (PTE) after injecting adipose tissue-derived mesenchymal stem cells (AdMSCs) in dogs.
  • This research involved administering fluorescently labeled AdMSCs to mice and comparing outcomes like survival rates and other health indicators across groups receiving the drugs and a control group.
  • Results showed that heparin significantly reduced PTE-related deaths compared to aspirin and SNP, suggesting its effectiveness in improving the safety of stem cell therapies in veterinary practice.
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  • The study aimed to create a rat model of Chiari-like malformation, a condition seen in dogs and humans characterized by a small caudal cranial fossa that leads to cerebellar herniation.
  • The researchers analyzed MRI data from normal and affected dogs, measuring caudal cranial fossa volume and volume index, which revealed significant reductions in affected dogs.
  • The established rat model mirrored these findings, showing similar reductions and confirming cerebellar herniation, making it a useful tool for further research in understanding and treating Chiari-like malformation.
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  • This review explores Chiari-like malformation (CLM), a condition characterized by displacement of the hindbrain due to inadequate skull size, affecting both humans and animals.
  • CLM causes obstruction at the craniocervical junction, disrupting cerebrospinal fluid flow and potentially leading to syringomyelia, with symptoms like head tremors, ataxia, and pain.
  • While magnetic resonance imaging is essential for diagnosis, current treatments such as foramen magnum decompression provide only temporary relief, highlighting the need for further research on effective long-term treatment options.
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This report describes the successful intrahepatic duct incision and closure for the treatment of multiple cholelithiasis in a dog with untreated hypothyroidism. A 12-year-old spayed female Spitz dog weighing 11.3 kg was diagnosed with multiple cholelithiasis, and a quadrate liver lobectomy and cholecystectomy were performed.

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Background: Hepatocellular carcinoma (HCC) is the most common malignant liver tumor in dogs. Although surgical resection is a major treatment option for canine HCC, there are no distinct strategies for unresectable tumor subtypes or adjuvant chemotherapy for tumors with positive margins. We aimed to establish and characterize novel HCC cell lines from canine patients.

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Importance: The intravenous administration of adipose tissue-derived mesenchymal stem cells (AdMSCs) in veterinary medicine is an attractive treatment option. On the other hand, it can result in severe complications, including pulmonary thromboembolism (PTE).

Objective: The present study assessed the occurrence of PTE after the intravenous infusion of canine AdMSCs (cAdMSCs) into experimental animals.

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Gastrointestinal stromal tumors arising from gastric cardia are uncommon in dogs. A few studies have shown the effectiveness of tyrosine kinase inhibitors in the treatment of canine gastrointestinal stromal tumors, but no standardized protocols are currently available. An 11-year-old spayed female Maltese dog was diagnosed with a gastrointestinal stromal tumor using histopathological and immunohistochemical analyses.

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A 2-year-old spayed female British Shorthair cat presented with an increased frequency and duration of cough since infant period. Based on radiographic, ultrasonographic, and computed tomography findings, peritoneopericardial diaphragmatic hernia was considered so that repair surgery was planned. During celiotomy, lax diaphragm was identified instead of defect.

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This retrospective case series describes the signalments, clinical signs, diagnostic test results, and postoperative complications obtained from the medical records of 10 client-owned dogs that underwent treatment for grade IV tracheal collapse using double-wire woven nitinol stents between October 2017 and September 2021. Respiratory signs resolved in all dogs immediately after tracheal stent placement. Mild to moderate stent fractures were identified in five dogs, of which two showed concurrent respiratory distress necessitating re-stenting after several months.

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This study aimed to evaluate fatigue of three stent designs when various forces are applied and perform a comparative analyses. A computer simulation using the finite element method was performed. In particular, we constructed a three-dimensional finite element model of nitinol stents with three designs (S6: single-woven wire, wire diameter: 0.

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A 15-year-old Cocker Spaniel was referred to for the evaluation of left forelimb lameness. Radiographic and computed tomography examinations revealed osteolysis of the proximal left third, fourth and fifth metacarpal bones and pathological fractures of the proximal left fourth metacarpal bone. Histopathological examination via bone biopsy did not provide a definitive diagnosis, and the owner elected limb-sparing surgery.

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A 10-year-old spayed female Pomeranian dog was referred for hepatic mass evaluation. Blood tests revealed mildly elevated alkaline phosphatase activities. Computed tomography revealed a mass with multiple nodules on the right hepatic medial lobe adjacent to the caudal ; histopathology confirmed mixed hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC).

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Primary renal neoplasia is rare in humans and dogs, with renal cell carcinoma (RCC) being the most common form of this cancer. As RCC is often diagnosed at an advanced stage, pulmonary metastasis is frequently observed. Tyrosine kinase inhibitors (TKIs) are the standard adjuvant treatments for metastatic RCC in humans.

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Osteosarcoma (OSA) is the most common malignant bone tumour in dogs; however, OSA of the maxilla is uncommon compared to appendicular OSA. Oral melanoma also commonly occurs in dogs with frequent distant metastasis. The role of adjuvant chemotherapy has been questioned in maxillary OSA and melanoma.

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Background: The need for a storage method capable of preserving the intrinsic properties of bones without using toxic substances has always been raised. Supercooling is a relatively recently introduced preservation method that meets this need. Supercooling refers to the phenomenon of liquid in which the temperature drops below its freezing point without solidifying or crystallizing.

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Osteomyelitis caused by staphylococcal infection is a serious complication of orthopedic surgery. is the main causative agent of osteomyelitis in veterinary medicine. Methicillin-resistant (MRSP) has been reported in companion animals, especially dogs.

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A 4-year-old mixed breed dog and a 19-year-old English cocker spaniel dog were evaluated for fecal incontinence. The second dog's fecal incontinence was associated with the anal mass. In both dogs, reconstruction of the external anal sphincter was required to gain fecal continence.

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Investigating the characteristics of tracheas can help the understanding of diseases related to the trachea, particularly tracheal collapse (TC) in dogs. This study aimed to compare the mechanical properties of tracheas from New Zealand White (NZW) rabbits and dogs and to introduce a method for inducing a model of TC in the normal trachea. Tracheal samples were obtained from NZW rabbit cadavers (n=5) weighing 3.

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An 11-year-old intact female mixed breed dog was presented with abdominal distention and elevated hepatic enzyme levels. Computed tomography revealed a multicystic hepatic mass at the left medial lobe adjacent to the diaphragm and caudal vena cava. The mass was surgically removed with partial hepatectomy, but it could not be removed completely because of adhesion to the diaphragm.

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  • A 14-year-old female Shih-Tzu was referred to a veterinary hospital due to an abdominal mass, which was later identified as two large cystic masses in the liver.
  • Surgical removal of the affected liver lobes was performed, and histopathological analysis confirmed the diagnosis of biliary cystadenocarcinoma (BCAC).
  • Despite surgery, the cancer recurred within 36 days, and the dog ultimately passed away 271 days after the operation; this report aims to contribute more comprehensive clinical information about BCAC in dogs.
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A 5-year-old neutered male Shiba Inu dog presented with a history of oral bleeding, dysphagia, and depression for 3 weeks. The physical examination revealed a firm mass in the right caudal palatal region along the level of PM4-M2. On the computed tomography, the mass was round-to-oval in shape and 22 mm × 30 mm × 15 mm in size.

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Purpose: To identify an optimal self-expandable metallic stent (SEMS) and verify whether a mechanically superior SEMS would result in better clinical outcomes in the treatment of tracheal collapse.

Methods: We selected three SEMS (n = 8 each), including an S-type stent with a wire diameter of 0.006 inches (S6) and two D-type stents with wire diameters of 0.

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  • A ureterocele is a rare condition where the last part of the ureter swells inside the bladder, either in a normal position or an abnormal one, and its cause is not fully understood.
  • Urothelial carcinoma is common in dogs' urinary tracts, with most cases being invasive, but a non-invasive type exists that stays within the ureteral mucosa without spreading.
  • A 7-year-old Maltese dog with symptoms like lethargy and frequent urination was found to have an orthotopic ureterocele and hydronephrosis, leading to surgery where a non-invasive cancer was discovered, but the dog recovered well with no complications afterward.
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