Hemangiosarcoma of the nasal planum in cats: five cases (2010-2021).

CASE SERIES SUMMARY: Nasal planum tumors are rare in cats, with squamous cell carcinoma over-represented. Other skin tumors have been reported in this location and though hemangiosarcoma frequently occurs on the skin of the head, these tumors localized to the nasal planum have not been specifically reported. The objectives of this study were to report the clinical findings and outcomes in cats diagnosed with hemangiosarcoma of the nasal planum. Medical records from four different institutions were reviewed to identify cats with a definitive diagnosis of hemangiosarcoma of the nasal planum. Five cats met the inclusion criteria. One cat was treated with palliative radiation therapy (RT) alone, two cats had lesions removed via an excisional biopsy by the primary care veterinarian and two cats had excisional biopsies performed at a referral institution. All four cats that received surgical treatment were treated with adjuvant strontium-90 therapy. The cat receiving palliative RT alone was lost to follow-up 311 days after treatment. At the time of writing, the survival time for 2/3 cats receiving surgery and strontium-90 was 365 days and 1381 days, respectively. One cat receiving this combination of therapy was lost to follow-up immediately after treatment. One cat developed tumor recurrence and a revision surgery via nasal planectomy and upper lip resection was performed 376 days following the initial surgery. Following revision, palliative RT was pursued. The cat was still alive at the time of writing 618 days after the initial procedure, with no evidence of recurrence. RELEVANCE AND NOVEL INFORMATION: In this case series, surgery was the primary treatment used, but due to the location, only narrow or incomplete surgical margins were possible. RT (strontium-90 and/or palliative) was utilized to decrease the risk of recurrence.

The outcome for feline non-hypersecretory thyroid carcinoma after thyroidectomy.

A 14-year-old neutered male cat was presented because of a left ventral cervical mass. Based on imaging, the mass was suspected to have a thyroid origin. There was no evidence of gross metastatic disease or hyperthyroidism. Left thyroidectomy alone was the treatment for this patient and a thyroid carcinoma was diagnosed on histopathology. At last follow-up, 831 days after surgery, there was suspicion of metastasis to the lungs and the cat had developed a right thyroid mass and hyperthyroidism. Key clinical message: This case report identifies a non-hypersecretory thyroid carcinoma. This is a rare diagnosis. The outcome with surgery alone was comparable to that reported for treatment with iodine131.

Issue à la suite d'une thyroïdectomie pour un carcinome thyroïdien non-hypersecréteur félin. Un chat mâle castré âgé de 14 ans fut présenté concernant une masse ventro-cervicale gauche. Basé sur l'imagerie, la masse était suspectée être d'origine thyroïdienne. Il n'y avait pas d'évidence macroscopique de métastases ou d'hyperthyroïdisme. Une thyroïdectomie gauche fut l'unique traitement pour ce patient et un carcinome thyroïdien fut diagnostiqué lors de l'examen histopathologique. Lors de la dernière visite de suivi, 831 jours après la chirurgie, il y avait un doute de métastases aux poumons et le chat avait développé une masse thyroïdienne droite et de l'hyperthyroïdisme.Message clinique clé :Ce rapport de cas identifie un carcinome thyroïdien non-hypersecrétoire. Il s'agit d'une condition rarement diagnostiquée. L'issue à la suite de seulement une chirurgie était comparable à ce qui est rapporté pour un traitement avec de l'iode131.(Traduit par Dr Serge Messier).

Iliectomy with limb preservation for a dog with ilial osteosarcoma: Surgical description and case report.

OBJECTIVE: To report the surgical technique for iliectomy and outcome in a single clinical case. STUDY DESIGN: Case report. ANIMAL: A 10-year-old female spayed Rottweiler. METHODS: A dog presented with left pelvic limb lameness due to a mass involving the left ilium. Fine needle aspirates were indicative of a sarcoma and suspicious for osteosarcoma. Computed tomography of thorax, abdomen, and pelvis was performed as well as skeletal scintigraphy, with no evidence of metastasis seen. The dog underwent iliectomy with preservation of the ipsilateral limb and was ambulatory 24 hours after surgery. Results of histopathology confirmed the diagnosis of an osteosarcoma. RESULTS: A right ischial fracture was noted 8 days postoperatively and was conservatively managed. Local recurrence was reported 385 days postoperatively, with no overt metastatic disease revealed by computed tomography of the thorax and abdomen. The dog was euthanized because of local recurrence 430 days after surgery. CONCLUSION: Iliectomy was well tolerated in this dog and afforded good function of the pelvic limbs. Local recurrence developed with no evidence of metastasis at the last follow-up. Iliectomy can be considered for a mass confined to the ilium when preservation of the limb is desired. Additional studies are required to determine the local recurrence and complication rates associated with this procedure in dogs with axial skeletal osteosarcoma. CLINICAL SIGNIFICANCE: To the authors' knowledge, this case report represents the fist surgical description and clinical outcome for an iliectomy in dogs.

Laparoscopic access to the liver and application of laparoscopic microwave ablation in 2 dogs with liver neoplasia.

OBJECTIVE: To determine laparoscopic accessibility of liver lobes and access to the hilus and describe laparoscopic microwave ablation (LMWA) in 2 dogs with hepatic neoplasia. STUDY DESIGN: Experimental/descriptive case series. SAMPLE POPULATION: Six canine cadavers and 2 clinical dogs. METHODS: Cadavers in dorsal recumbency underwent laparoscopic assessment of the liver. A 17 gauge MWA probe was inserted to create an ablation zone at the most proximal aspect of the hilus. The distance from the center of each ablation zone to the most proximal aspect of the corresponding hilus was determined. Two dogs with hepatic neoplasia underwent LMWA. RESULTS: All lobes of the canine liver were accessible via laparoscopy. The median (interquartile range) distances from the ablation zones to the hilus for the caudate process, left lateral, left middle, quadrate, right lateral, and right middle lobes were 2.2 (1.2-2.6), 2.1 (1-4.4), 1.5 (1.4-3.7), 2, 1, 2.5 (1-4.1) cm, respectively. Histopathologic diagnoses treated by LMWA included metastatic hemangiosarcoma and primary hepatocellular carcinoma. Laparoscopic microwave ablation was technically feasible, and no complications from the procedure resulted. CONCLUSION: Laparoscopic access to the hilus of each liver lobe is possible via a ventrodorsal approach provided reverse Trendelenburg and lateral rotation is used, especially for the right lateral lobe. Laparoscopic microwave ablation is feasible in some dogs with hepatic neoplasia. The indications for and efficacy of LMWA for hepatic neoplasia in dogs requires additional investigation. CLINICAL SIGNIFICANCE: Laparoscopic access to all liver lobes and MWA of some neoplastic lesions is feasible in a canine pilot study.