Anal Gland Research Articles

Efficacy and tolerance of short cycles of palliative radiotherapy in advanced anal sac adenocarcinomas in dogs

Successful management of advanced anal sac gland adenocarcinomas (AGASACA) often requires a multimodal approach. In recent years the role of palliative radiotherapy (pRT) has become increasingly more important, mainly in dogs with severe local clinical signs. This study describes efficacy and tolerance of short cycles of pRT. Retrospective single-institution study including dogs with AGASACA treated with at least one short cycle of pRT (IMRT, 4Gy BID for two consecutive days). All dogs were staged with CT and followed to death. Outcome measures were PFS and OST from the first pRT. Potential prognostic factors were evaluated. Twelve dogs were included (one stage II, four stage III, seven stage IV). Three dogs had one cycle, seven had two cycles, and two had three cycles of pRT. All dogs experienced a clinical benefit after pRT. One dog also had surgery, four systemic treatment, and five both. Eleven dogs died during the follow-up (four for local progression, six for systemic progression, one unknown). The median PFS was 198 days (95% CI 98—298) and the OST was 250 days (95% CI 124—376). Mild, acute, short-term GI toxicity occurred in seven dogs (five G1; two G2). None of the dogs experienced clinically relevant late toxicity. Short cycles of radiotherapy can be effectively used as a palliative treatment for advanced AGASACA with minimal toxicity. The small number of patients did not allow to assess the benefits of combining RT with other treatment modalities or the identification of meaningful prognostic factors.

Comparison of computed tomography findings between perianal tumors originating from the anal sacs and perianal glands in dogs.

Tumors originating from the anal sacs and perianal glands are common tumors of the perianal region. However, differentiation of perianal tumors based on CT findings remains challenging because perianal tumors can show overlapping CT characteristics. Therefore, this retrospective, multi-institutional study aimed to identify the CT findings that can differentiate between tumors originating from the anal sacs and perianal glands in canines. Twenty dogs were included, with nine apocrine gland anal sac adenocarcinomas (AGASACAs), six perianal gland adenomas, three perianal gland carcinomas, and two perianal gland epitheliomas. The tumor CT features included the tumor growth pattern, tumor shape, cystic changes within the tumor, contrast enhancement pattern, displacement of the anus, and identification of the anal sacs. The prevalences of suspected metastatic lymphadenopathy of the iliosacral lymph centers and lung metastases were evaluated. The tumor volumes and values normalized to body weight were also assessed. The tumor growth patterns differed significantly between AGASACAs and perianal gland tumors. AGASACAs mostly showed unilateral growth, whereas perianal gland tumors mostly exhibited bilateral growth. CT features, except for the tumor growth pattern, failed to show significant differences between tumors arising from the anal sacs and those arising from the perianal glands. Although histopathological diagnosis remains the gold standard, this study's findings suggest that CT analysis of tumor growth patterns may help differentiate AGASACAs from perianal gland tumors.

Efficacy of an oral chew containing fibre and Bacillus velezensis C-3012 in the management of anal sac impaction in dogs.

Anal sac impaction is common in dogs. Manual expression may be effective, yet recurrence can be problematic. To facilitate physiological emptying of the sacs, it is important to maintain bulky stool consistency. The study evaluated if supplementation with a complementary feed product formulated as a chew containing Bacillus velezensis C-3102 and fibre sources, reduced anal sac impaction recurrence. Thirty-five client-owned dogs with anal sac impaction were enrolled. Prospective, randomised, negative controlled field clinical trial with 22 dogs receiving the chew orally for 90 consecutive days and 13 dogs with no treatment. Dogs were evaluated on Day (D) 30, 60, 90 and 120 for the presence of clinical signs of anal sac impaction and the need to empty the sacs. Any animal that required manual expression of the sacs was classified as a failure and was withdrawn from the study. The cumulative percentage of failures in the untreated group increased steadily from the first follow-up visit on D30 (15%) to the last visit on D120 (61.5%). However, in the group receiving the chew the cumulative percentage of failures increased at a much slower rate and stabilised at 19% from the D90 visit (last administration day) until the end of the study on D120, with statistically significant differences (p = 0.025). Animals receiving the chew also showed reduction in clinical signs. The probiotic and fibre chew was a safe and effective management option for recurrent anal sac impaction in dogs.

Modified closed sacculectomy in 50 dogs with non‐neoplastic anal sac disease

Modified closed sacculectomy in 50 dogs with non‐neoplastic anal sac disease

Cross-sectional survey of 43,517 dogs in the Dog Aging Project identifies owner-reported lifetime prevalence and characteristics of gastrointestinal disease.

To evaluate the prevalence of and characteristics associated with owner-reported gastrointestinal (GI) disease in companion dogs within the US. Cross-sectional owner-reported survey study of 43,517 dogs enrolled in the DAP between December 26, 2019, and December 31, 2022. Dogs were grouped on the basis of having an owner-reported GI disorder (ORGID) versus not having that ORGID at any point in their history (control group). Multivariable logistic regression analysis was used to estimate the association between dog characteristics and ORGIDs with prevalence ORs (PORs). Of the 43,517 dogs in the DAP Pack, 30,677 (70%) had no history of ORGIDs and 12,840 (30%) had at least 1 ORGID. The most common ORGIDs included infectious diseases (7,580 of 43,517 [17%]), chronic diarrhea (1,316 [3%]), foreign bodies (1,086 [2%]), anal sac impactions (1,031 [2%]), pancreatitis (857 [2%]), inflammatory GI disease (615 [1%]), chronic vomiting (519 [1%]), and acute hemorrhagic diarrhea syndrome (388 [1%]). Compared to controls, dogs with noninfectious ORGIDs had greater odds of having a history of being castrated (POR, 2.55; 95% CI, 2.29 to 2.85), underweight (POR, 1.58; 95% CI, 1.47 to 1.70), or fed primarily canned food (POR, 2.51; 95% CI, 2.21 to 2.85) or receiving probiotics (POR, 1.69; 95% CI, 1.58 to 1.81) or nonprescription GI medications (POR, 4.06; 95% CI, 3.80 to 4.33). Dog owners in the US recruited from the general public reported a high prevalence of GI disorders in their dogs. Infectious and noninfectious ORGIDs were reported with approximately equal frequency. Dogs with ORGIDs were more likely to have a history of receiving probiotics or nonprescription GI medications, which may indicate that owners are changing lifestyle practices to accommodate these GI disorders, although future longitudinal research is needed.

Incorporation of pre- and intra-operative sentinel lymph node mapping techniques in dogs with apocrine gland anal sac adenocarcinoma

The high incidence of nodal metastasis, variable lymphatic drainage patterns, and prognostic significance of nodal metastasis in dogs with apocrine gland anal sac adenocarcinoma (AGASACA) highlight the need for development of standardized techniques for lymph node staging in canine AGASACA. The aim of this study was to develop and describe the utility of pre- and intra-operative sentinel lymph node (SLN) mapping techniques for subsequent nodal extirpation and histologic assessment in dogs with AGASACA. A prospective clinical trial was performed as a pilot study. Eight client-owned dogs with unilateral AGASACA were enrolled. Preoperative contrast-enhanced ultrasound (CEUS) via transrectal ultrasound (TRUS) and CT-lymphography (CTL) was followed by intraoperative SLN mapping within 7 days utilizing a visible dye (methylene blue [MB]) and a near-infrared (NIR) fluorescent dye (indocyanine green [ICG]) with subsequent nodal extirpation and routine anal sacculectomy. In all dogs, preoperative CTL and intraoperative SLN mapping identified at least one SLN. Pre- and intra-operative findings differed in 4/8 dogs. Preoperative CEUS identified a SLN in 7/8 dogs, but the exact location of the SLN was indeterminate. Extirpated lymph nodes were metastatic in 2/8 dogs. Preoperative CTL and intraoperative MB and ICG were an effective combination of SLN mapping techniques in dogs with AGASACA. These techniques each provided unique advantages. Combined, they identified and guided extirpation of early metastatic lymph nodes. Large-scale, prospective studies utilizing the techniques described are needed to accurately determine the incidence and significance of early/occult nodal metastasis in canine AGASACA.

Plant-Based Therapies for Atopic Dermatitis Management: A Review

Dermatological issues pose a frequent challenge for small clinical practitioners, presenting a spectrum of conditions encompassing otitis, pyoderma, anal sac problems, flea allergy, and atopic dermatitis (AD). Atopic Dermatitis (AD) is a chronic and recurring skin condition characterized by distributed skin lesions. In recent decades, researchers have shown a keen interest in AD due to its increased prevalence in developed countries. While various treatment strategies, including biological and immune modulators, are available for AD, each has certain limitations. Researchers have exhibited a significant interest in managing AD with herbal medicines. The use of herbal drugs for AD could potentially eliminate local and systemic adverse effects associated with long-term corticosteroid use, as well as reduce the high cost of therapy with biological drugs. This review discusses traditional East Asian herbal medicines as well as scientific data related to newer herbal extracts or compositions for the treatment of AD. The paper also delves into in vivo animal models and in vitro cell cultures that have been investigated with herbal medicines to establish a potential role in the treatment of AD. In conclusion, herbal medicines could serve as a better and safer complementary and alternative treatment option for AD.

Immunohistochemical Expression of Human Epidermal Growth Factor Receptor 2 and Ki67 in Apocrine Gland Anal Sac Adenocarcinoma.

Apocrine gland anal sac adenocarcinoma is an aggressive neoplasm, and surgery remains the treatment of choice, although it is controversial in advanced cases. The prognostic factors are not well established. Human Epidermal Growth Factor Receptor 2 (HER2) is a membrane protein related to tumorigenesis, whereas Ki67 is a nuclear protein related to cell proliferation. Both are potential prognostic markers and therapeutic targets. This study aimed to evaluate the expression of HER2 and Ki67 markers in canine apocrine gland anal sac adenocarcinoma. The tumor samples were divided into four groups: largest tumor diameter less than 2.5 cm, largest tumor diameter greater than 2.5 cm, metastatic lymph nodes, and control group of non-neoplastic anal sacs. Each contained 10 samples. Immunohistochemistry was performed to verify the expression of HER2 and Ki67 markers. Positive HER2 staining was observed in 45% of the neoplastic cases and negative HER2 staining in 100% of the control group. The Ki67 expression had a median of 25% in all groups, except for the control group, which had a median of 8%. The HER2 and Ki67 expression was present in apocrine gland anal sac adenocarcinoma, making them potential therapeutic targets. However, it was not possible to determine the clinical value of either marker.

Photobiomodulation therapy using a class 3b laser does not cause premature rupture of multivesicular liposomal bupivacaine suspensions in a cadaver model.

To determine if photobiomodulation causes a premature release of liposomal bupivacaine (LB) suspensions. A 25-kg mixed breed dog cadaver euthanized for reasons unrelated to this study. In September 2022, a proximomedial tibial incision was made in a dog cadaver, and a tibial plateau leveling osteotomy plate was implanted. A stab incision was made one-half inch distal to the incision, and a tunnel to the plate was created prior to closure of the primary wound. A 3-cc anal sac catheter was advanced through the distal incision until the bulb rested against the face of the plate. Seven treatment groups of treatment power (watts) and total energy (joules/cm2) were defined as: A, 0.5 W, 2.0 J/cm2; B, 0.5 W, 4.0 J/cm2; C, 0.5 W, 6.0 J/cm2; D, 1.0 W, 2.0 J/cm2; E, 1.0 W, 4.0 J/cm2; F, 1.0 W, 6.0 J/cm2; and sham, 0.0 W, 0.0 J/cm2. Ten samples per group of 2 mL of LB were infused into a new catheter and treated percutaneously with a class 3b laser. All samples remained in the catheter for 12 seconds to reflect the longest treatment time. Post-treatment free bupivacaine concentrations were identified with high-performance liquid chromatography. The median free bupivacaine concentration was reported as: sham, 1.89 mg/mL; A, 1.93 mg/mL; B, 2.01 mg/mL; C, 2.05 mg/mL; D, 1.92 mg/mL; E, 2.03 mg/mL; and F, 2.00 mg/mL. There were no differences in median free bupivacaine concentrations between groups (P = .988). Concurrent LB and photobiomodulation are recommended during the postoperative period. The results of this proof-of-concept study suggest that concurrent use of LB and photobiomodulation may be safe, but in vivo studies at similar and stronger photobiomodulation settings are warranted.

Ultrasound Morphology of Presumed Normal Anal Sacs in Dogs and Cats.

Ultrasonographic evaluation of canine and feline anal sacs is a practical promising modality to identify anal sac disease. However, limited data are available about normal ultrasound morphology of the anal sacs. This study describes the ultrasound morphology of presumed normal anal sacs in a larger sample of client-owned dogs and cats. A single-institutional prospective cross-sectional descriptive study was performed, and 137 dogs and 131 cats were included. The most common ultrasound features of the evaluated anal sacs in the dorsal plane were oval shape (99.3% of dogs and 98.5% of cats) and bilaterally similar content (94.2% of dogs and 95.4% of cats), mostly hypoechoic with diffusely hyperechoic points or unformed echogenic material (42.6% of dogs and 44% of cats). Gas in the lumen of the anal sac was detected in two dogs and mineralization in one dog. There was a statistically significant positive correlation between body weight and the size of anal sacs in dogs ≤15 kg and cats and a correlation between age and the size of anal sacs in cats. This simple method provides additional clinically significant information in detecting abnormal findings in asymptomatic patients and could contribute to the early detection of anal sac disease.

Radiotherapy for Canine Apocrine Gland Anal Sac Adenocarcinoma: Survival Outcomes and Side Effects of a Palliative Treatment Protocol of 20 Gy in Five Consecutive Fractions.

This research aims to evaluate the outcomes of a radiotherapy protocol, consisting of five fractions of 4 Gy each, resulting in a total dose of 20 Gy for apocrine gland anal sac tumors and local lymph nodes in canines. This protocol was assessed as a palliative treatment for macroscopic tumors alone, or in combination with additional therapies under different scenarios. Medical records from fifty canine patients met the inclusion criteria and were divided into different treatment groups: radiotherapy alone (n = 22, 44%), radiotherapy with chemotherapy or targeted therapy with toceranib (n = 18, 36%), surgery with radiotherapy (n = 5, 10%), and surgery with radiotherapy and chemotherapy or targeted therapy with toceranib (n = 5, 10%). Patients who received radiotherapy alone had a median survival time of 384 days (95% CI 198-569) and 628 days (95% CI 579-676) for RT + additional therapies. The median time to progression for patients with radiotherapy alone was 337 days (95% CI 282-391 days), and 402 days (95% CI 286-517 days) for radiotherapy plus additional treatments. Acute side effects were mild, with the majority having diarrhea (61%), and only one patient developed grade III late effects VRTOG v2 classification; however, this happened 22 months after the first radiotherapy protocol after re-irradiation. The results demonstrate that radiotherapy alone under this protocol provided a comparable median time to progression vs. radiotherapy plus additional treatments while maintaining acceptable side effects. The combination of this protocol with other treatment modalities offers attractive results for local disease control and survival while maintaining acceptable toxicities. Overall, these findings contribute to the growing evidence supporting the role of radiotherapy in managing apocrine gland anal sac adenocarcinoma in dogs.

Clinical manifestations of chronic pancreatitis in English cocker spaniels.

Chronic pancreatitis (CP) is common in English cocker spaniels (ECS). It is histologically similar to IgG4-related disease (IgG4-RD) in humans and is characterized by duct destruction, interlobular fibrosis, and dense periductular and perivenous lymphocytic aggregates. However, the clinical manifestations of CP in ECS have not been previously described. Characterize the clinical manifestations of CP in a group of ECS, including similarities and differences to IgG4-RD in humans. One-hundred four ECS with CP and 44 client owned control ECS without CP (both healthy and diseased controls). Affected dogs were divided into 2 groups according to the methods used to diagnose CP. Case records were searched for signalment, clinical, and clinicopathological findings, and evidence of keratoconjunctivitis sicca (KCS), proteinuria, other immune-mediated diseases, and anal sacculitis. Involvement of other organs was common. Affected ECS presented with a high frequency of KCS (n = 49), proteinuria (n = 47), anal gland disease (n = 36), atopy (n = 21), and other immune-mediated diseases (n = 16). Those with parti-color hair coats, particularly blue roan, had a strong association with CP, suggesting a link between coat color and autoimmune conditions in this breed. English cocker spaniels with CP show clinical similarities to humans with IgG4-RD and common involvement of other organs. Clinicians should evaluate affected Cocker Spaniels for proteinuria, keratoconjunctivitis sicca, and other potential immune-mediated diseases.

Sprayed Urine Emits a Pungent Odor due to its Increased Adhesion to Vertical Objects via Urinary Proteins Rather Than to Changes in its Volatile Chemical Profile in Domestic Cats.

Spraying urine on vertical objects by raising the tail is a commonly observed functional behavior for chemical communication in Felidae species, including domestic cats (Felis silvestris catus). The sprayed urine is recognized as a chemical signal for territorial ownership of their habitats. Previous studies reported that sprayed urine emits a more pungent odor than urine excreted from a squatting position. However, little is known about how sprayed urine acts as a strong scent mark in the environment. Here, we showed that sprayed urine originates only from bladder urine without any secretions, such as anal sac secretions, but it can effectively emit volatile organic compounds (VOCs) when smeared on vertical objects due to its strong adhesion. Chemical profiles of VOCs and odor qualities were similar between fresh sprayed urine and bladder urine sampled immediately after spraying from the same individuals. Meanwhile, feline-specific proteinuria arising from excretion of a carboxylesterase that produces a precursor of cat-specific odorants resulted in reduced surface tension of the urine and increased adhesion to vertical surfaces, which kept sprayed urine on the surfaces and led to the emission of large amounts of VOCs. In conclusion, proteinuria contributes to the emission of a strong odor through its enhanced adhesion to vertical objects without other secretions containing malodorous substances. These findings improve our understanding of the mechanism of scent marking via the spraying of urine for chemical communication in cats.

Histopathological diagnosis and surgical complications following bilateral anal sacculectomy for the treatment of unilateral canine apocrine gland anal sac adenocarcinoma: 35 cases (2019-2023).

To report the histopathological diagnosis of both anal sacs in dogs undergoing bilateral anal sacculectomy for the treatment of unilateral apocrine gland anal sac adenocarcinoma and to compare the surgical complication rate associated with this procedure in this population with previously published literature. Records were retrospectively reviewed for dogs that underwent bilateral anal sacculectomy for the treatment of apparently unilateral apocrine gland anal sac adenocarcinoma, at a single institute between 2019 and 2023. Clinical staging, surgical treatment, histological findings, intra- and postoperative complications were evaluated. Thirty-five dogs were included. Only five of 35 (14%) dogs were found to have histologically normal contralateral anal sacs. Non-neoplastic anal sac disease was found in 23 of 35 (66%) dogs and bilateral apocrine gland anal sac adenocarcinoma was seen in seven of 35 (20%) dogs. None of the dogs diagnosed with bilateral neoplasia had evidence of bilateral neoplasia before surgery despite a thorough work-up. Complications attributable to the primary tumour removal were seen in 9% of dogs intraoperatively and 14% of dogs postoperatively, commonly tumour capsule disruption and surgical site infection, respectively. Bilateral anal sac disease was diagnosed histologically in the majority of presumed normal anal sacs, with 20% of cases being found to have bilateral apocrine gland anal sac adenocarcinoma. The surgical complication rates of this cohort were comparable to those reported for unilateral anal sacculectomy alone. These findings promote and encourage the use of bilateral anal sacculectomy in cases of suspected unilateral anal sac neoplasia.

The Use of Sentinel Lymph Node Mapping for Canine Mast Cell Tumors.

Cancer is the leading cause of death in companion animals. The evaluation of locoregional lymph nodes, known as lymph node mapping, is a critical process in assessing the stage of various solid tumors, such as mast cell tumors (MCTs), anal gland anal sac adenocarcinoma, melanoma, and mammary gland adenocarcinoma. MCTs are among the most prevalent skin malignancies in dogs. Staging is used to describe the extent of neoplastic disease, provide a framework for rational treatment planning, and evaluate treatment results. The aim of this review is to present the current knowledge on sentinel lymph node (SLN) mapping in canine MCTs, its influence on treatment decisions and prognosis, as well as the advantages and limitations of different SLN techniques currently available in veterinary oncology. A search methodology was adopted using the PubMed, Scopus, and Google Scholar databases. Critical analyses of up-to-date research have shown that lymphoscintigraphy can achieve a lymph node detection rate of between 91 and 100%. This method is becoming increasingly recognized as the gold standard in both human and veterinary medicine. In addition, initial studies on a limited number of animals have shown that computed tomographic lymphography (CTL) is highly effective in the SLN mapping of MCTs, with detection rates between 90 and 100%. The first study on contrast-enhanced ultrasound (CEUS) also revealed that this advanced technique has up to a 95% detection rate in canine MCTs. These methods provide non-ionizing alternatives with high detection capabilities. Furthermore, combining computed tomography and near-infrared fluorescence (NIR/NIR-LND) lymphography is promising as each technique identifies different SLNs. Indirect lymphography with Lipiodol or Iohexol is technically feasible and may be also used to effectively detect SLNs. The integration of these mapping techniques into routine MCT staging is essential for enhancing the precision of MCT staging and potentially improving therapeutic outcomes. However, further clinical trials involving a larger number of animals are necessary to refine these procedures and fully evaluate the clinical benefits of each technique.

Clinical Study on the Treatment of Low Anal Fistula in Infants and Young Children by Anal Gland Excision and Virtual Hanging Procedure

Objective: To compare the efficacy of anal adenectomy with virtual hanging wire and anal fistulotomy in the treatment of low anal fistula in infants and children. Methods: 60 children with low anal fistula who were admitted to our hospital from October 2021 to March 2022 and met the inclusion criteria were randomly divided into two groups of 30 cases each; the treatment group was treated with anal adenectomy and virtual hanging wire surgery, and the control group was treated with anal fistula resection. The clinical efficacy after treatment was compared. Results: The total effective rate of both groups was 96.67% and the difference between the two groups was not statistically significant (P > 0.05). The postoperative pain score of the treatment group was lower than that of the control group (P < 0.05). The length of hospitalization and healing time of the treatment group was lower than that of the control group (P < 0.05). The anal function of the patients in both groups was normal, and there was no adverse reaction. Conclusion: Anal gland excision and virtual hanging surgery for the treatment of low anal fistula in infants and children have the advantages of mild pain, reduced length of hospitalization, short healing time, and better patient experience as compared to anal fistula excision.

Outcomes of dogs with apocrine gland anal sac adenocarcinoma treated via modified closed anal sacculectomy (2015-2022).

To evaluate the postoperative complication rate and local recurrence rate of apocrine gland anal sac adenocarcinoma (AGASACA) in dogs surgically treated with a modified closed anal sacculectomy technique between 2015 and 2022. Observational clinical retrospective study. Forty-seven client-owned dogs histologically diagnosed with AGASACA. Medical records were evaluated for patient demographics and history, physical examination findings, diagnostic imaging, incidence of concurrent neoplasia, postoperative complications, and incidence and time to local recurrence. Dogs with at least 150 days of follow-up were included in evaluation of local recurrence. Two dogs were euthanized at 4 and 11 days after surgery. Forty-five dogs were included for long-term local recurrence evaluation, with a median of 364 days of follow-up (range 156-2156 days). Only one dog (2.2%) developed local recurrence with a time to recurrence of 90 days. Postoperative complications were reported in 15 dogs (31.9%) and were considered minor in 14 dogs (93.3%) and major in one dog (6.7%). Mean survival time for the 20 dogs that were deceased as of November 1, 2022 was 521 days (range 156-1409 days) and the median survival time was 388 days. The modified closed anal sacculectomy technique resulted in a lower AGASACA local recurrence rate than previously reported in the veterinary literature with a comparable postoperative complication rate. Given the low recurrence rate found in this study, the modified closed anal sacculectomy technique may reduce the need for adjuvant radiation therapy and potentially chemotherapy in AGASACA patients.

Integrative management of high transsphincteric fistula-in-ano with a rectal opening: A case report

Abstract Transsphincteric fistula is a type of complex anal fistula, often considered a refractory surgical condition, which has the potential to produce complications, such as recurrent infections, abscess formation, and incontinence. A 48-year-old male farmer was diagnosed with a high transsphincteric fistula abscess with a secondary rectal opening based on clinical examination and magnetic resonance imaging findings. Under saddle block, incision and drainage of fistula abscess was performed, followed by threading of Apamarga Kshara Sutra (medicated seton) between the abscess cavity and the primary internal opening at 6 o’clock on the dentate line. Another internal opening was also identified in the lower rectum, left as it is. Panchavalkala Kwatha for sitz bath once a day, Varunadi Kwatha 20 mL twice a day orally, Kachanar Guggulu (500 mg) two tablets three times a day, and Apamarga Kshara Tail (AKT) dressing was prescribed for 124 days to facilitate optimal healing and management. Prophylactic as well as therapeutic antibiotics and analgesics were administered for 7 days. The fistula took 103 days for complete healing with a unit healing time of 0.251 day/cm3. Medicated seton on the dentate line facilitated drainage of the infected gland and healed the secondary rectal opening. Ischiorectal abscess cavity healed by secondary intention. This case report demonstrates that a high transsphincteric fistula-in-ano with a rectal opening can be successfully managed without fistulotomy to treat the secondary rectal opening. Chemical debridement of the infected anal gland was achieved by a medicated seton, and a new seton was replaced every 7 days until the cutting and healing of the fistula track. It also facilitated the drainage of the exudate. Wound management by AKT and adjuvant medicament supported faster recovery.

Veterinary Pathology Diseases and Disorders in Domestic and Wild Animals

Veterinary pathology plays a crucial role in understanding and managing diseases and disorders in both domestic and wild animals. This field encompasses the study of various pathologies, from infectious diseases like the Spanish Goat Encephalitis Virus, which causes severe neurological symptoms and high mortality in goats, to toxicological conditions such as oleander poisoning in horses, characterized by renal and cardiac lesions. It also includes the investigation of neoplastic conditions, as seen in canine apocrine gland adenocarcinoma of the anal sac and various tumors in African pygmy hedgehogs. The integration of clinical and histopathological findings is essential for accurate diagnosis, treatment, and management of these diverse conditions, highlighting the importance of veterinary pathology in animal health and welfare. Veterinary pathology, a vital branch of veterinary medicine, is instrumental in diagnosing, understanding, and managing a wide array of diseases and disorders in both domestic and wild animals. It encompasses the study of various pathologies, including infectious diseases, toxicological conditions, and neoplastic diseases. For instance, research into the Spanish Goat Encephalitis Virus sheds light on its neurological impact and high mortality rates in goats, while studies on oleander poisoning in horses focus on its renal and cardiac implications. Additionally, the field addresses neoplastic conditions such as canine apocrine gland adenocarcinoma of the anal sac and various tumors in African pygmy hedgehogs. This discipline is not only pivotal in diagnosing and treating these conditions but also plays a significant role in advancing our understanding of animal health and welfare, emphasizing the need for continuous research and collaboration between veterinary clinicians and pathologists.

Demography, common disorders and mortality of Shih Tzu dogs under primary veterinary care in the UK

BackgroundShih Tzus are a popular dog breed in the UK although there is relatively little reported information on their health. This study aimed to characterise the demography, common disorders and mortality of Shih Tzus under primary veterinary care during 2016 in the UK using de-identified clinical records from the VetCompass™ Programme.ResultsThe study population of 336,865 dogs under veterinary care during 2016 included 11,082 Shih Tzus (3.3%). The median age was 4.1 years (IQR: 2.1–7.1, range: 0.3–20.4) and mean adult bodyweight was 7.9 kg (SD: 1.9 kg). Annual proportional births increased from 2.2% of all dog births in 2005 to 3.8% in 2013, dropping to 3.3% by 2016. From a random subset of 2,423 Shih Tzus that had information extracted on disorders diagnosed during 2016, the most prevalent fine-level precision disorders were periodontal disease (n = 229, prevalence 9.5%, 95% CI: 8.4–10.7), anal sac impaction (180, 7.4%, 95% CI: 6.5–8.5) and ear disorders (134, 5.5%, 95% CI: 4.7–6.5). The most prevalent grouped-level precision disorders were cutaneous (n = 402, prevalence: 16.6%, 95% CI: 15.2–18.1), dental (322, 13.3%, 95% CI: 12.0–14.7), and ophthalmological (289, 11.9%, 95% CI: 10.7–13.3). Males were more likely than females to be diagnosed with skin disorders (P = 0.007) and musculoskeletal disorders (P = 0.010) while females were more likely than males to be diagnosed with hernias (P = 0.005). The median age of death was 12.7 years (IQR 8.7–14.3, range 2.0–19.9) and did not differ statistically between males and females. The most common grouped causes of death were enteropathy (7.9%, 95% CI: 3.9–15.4), heart disease (7.9%, 95% CI: 3.9–15.4) and poor quality of life (7.9%, 95% CI: 3.9–15.4).ConclusionsPeriodontal disease, anal sac impaction and ear disorders were identified as common health issues. Shih Tzus had higher prevalence of anal sac impaction, umbilical hernias and eye problems than reported previously in dogs overall, suggesting potential predispositions. Shih Tzus appear to be relatively long-lived compared to previous reports of lifespan in dogs overall. The results can inform veterinarians and owners on priority disorders for monitoring to protect welfare. Oral hygiene was highlighted as a healthcare priority.