Lymphoma

2023 - 2 - 15

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Image courtesy of "AZ Animals"

The 4 Types of Lymphoma in Dogs Explained (AZ Animals)

If your dog has been diagnosed with lymphoma, you likely have many questions. Let's discuss everything you need to know!

While this form of lymphoma can happen, it is the most rare form of lymphoma in dogs. Alimentary lymphoma is the second most common form of lymphoma in dogs. We understand how worried you are about your dog with lymphoma, so understanding the details of their condition is always helpful. While chemotherapy is the most common treatment option for canine lymphoma, we realize that many pet parents have their guards up when it comes to chemotherapy. While your vet will discuss the best treatment options for your dog based on their form of lymphoma, let’s break down the most common treatments below. Now that you have a better understanding of what lymphoma in dogs is, it’s time to discuss the four types of canine lymphoma. Mediastinal lymphoma invades the lymph nodes within the dog’s chest, often leading to a large mass in the chest and severe breathing complications. Extranodal lymphoma is extremely rare in dogs, but it can happen from time to time. Lymphoma is a cancer in dogs that impacts the lymphatic system, and this involves many regions of the body. Lymphoma is one of the most common cancers found in our canine companions. While the cancer can invade any lymph node, it most commonly effects the lymph nodes in the neck, groin, chest, armpits, and behind the knees. The canine lymphatic system includes the spleen, the lymph nodes, the tonsils, and the lymphatic vessels.

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Image courtesy of "OncLive"

Brexu-cel Is Effective and Tolerable in Relapsed/Refractory Mantle ... (OncLive)

Treatment with brexucabtagene autoleucel in the standard-of-care relapsed/refractory mantle cell lymphoma setting provided an efficacy and safety profile ...

The median duration of ICANS was 6 days (range, 1-144+). The median time to ICANS onset was 6 days (range, 1-18). The median duration of CRS was 5 days (range, 1-33). The investigators observed inferior PFS in patients with high-risk simplified MIPI (HR, 3.82; 95% CI, 1.92-7.59; log-rank P < .001), Ki-67 proliferation of at least 50% (HR, 3.02; 95% CI, 1.43-6.38; log-rank P = .007), TP53aberration (HR, 1.98; 95% CI, 1.18-3.31; log-rank P = .008), complex karyotype (HR, 2.23; 95% CI, 1.25-3.98; log-rank P = .005), or blastoid/pleomorphic variant (HR, 1.61; 95% CI, 1.03-2.53; log-rank P = .036). Of the patients who had bendamustine exposure within 6 months prior to leukapheresis (n = 32), 41% did not receive infusion (P < .001). The median time to CRS onset was 4 days (range, 0-13). The median overall survival (OS) after infusion was not reached (NR; 95% CI, 18.7-NE). After infusion, the median progression-free survival (PFS) was 16.4 months (95% CI, 12.7-NE). Of the patients who responded, the median time to best response was 30 days (range, 16-193). The median duration of response was 17.2 months (95% CI, 14.4-not estimable [NE]). Patients had a median of 3 prior lines of therapy (range, 1-10), and 77% had progressed on a BTK inhibitor. A total of 68% of patients (n = 128) received bridging therapy, including BTK inhibitor–based (n = 31), venetoclax (Venclexta)–based (n = 10), BTK inhibitor and venetoclax combination–based (n = 17), chemotherapy-based (n = 44), radiation-based (n = 12), and lenalidomide (Revlimid)–based (n = 6) regimens, and CD20 inhibitors and/or corticosteroids (n = 8).

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Image courtesy of "Targeted Oncology"

Brexu-Cel Shows Comparable Outcomes With ZUMA-2 in Real ... (Targeted Oncology)

Brexucabtagene autoleucel (brexu-cel; Tecartus), the first FDA-approved chimeric antigen receptor (CAR) T-cell therapy for relapsed/refractory mantle cell ...

This was very similar to the ZUMA-2 trial, in which 91% of patients had CRS, 15% of which was grade 3/4, and 63% of whom had neurologic events, 31% of which was grade 3/4. Lastly, these data were the first to show efficacy with brexu-cel in patients who were naive to BTK inhibitors. Median overall survival (OS) was not reached (95% CI, 18.7-NE), with 6-month OS rate of 86% (95% CI, 79%-90%) and 12-month OS rate of 75% (95% CI, 67%-81%). Patients who received BTK inhibitors also did not have a statistically significant difference in PFS from those who were naive to BTK inhibitors. No difference was seen in PFS based on worse performance status or being treatment-naive to bendamustine/anthracycline, but patients who would have been excluded from ZUMA-2 due to disease status or comorbidities did have a worse OS. Investigators observed that a 41% of patients who had received bendamustine within 6 months of leukapheresis did not receive brexu-cel, including 13% who had manufacturing failure. Patients with CNS involvement, who would have been excluded from ZUMA-2, did not appear to have worse PFS than the overall population. At a median follow-up of 14.3 months (95% CI, 12.7-15.9), the median DOR was 17.2 months (95% CI, 14.4-not estimable [NE]). In 95 who were assessed for a response, there was an ORR to bridging therapies of 33%, including 6% with a CR. Those with disease progression within 24 months of primary therapy also had a shorter PFS than overall, but it was not a statistically significant difference. Multiple high-risk disease features were associated with poor progression-free survival (PFS), as was prior exposure to bendamustine (Bendeka). Some of these were due to the ZUMA-2 trial requiring patients not receive prior therapies including anthracycline, bendamustine, or a Bruton tyrosine kinase inhibitor.

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