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1498 Feasibility of Interim PET-Adapted Therapy in HIV-Positive Patients with Advanced Hodgkin Lymphoma (HL): Sub-Analysis of SWOG S0816 Phase 2 Trial

Lymphoma: Chemotherapy, excluding Pre-Clinical Models
Program: Oral and Poster Abstracts
Session: 623. Lymphoma: Chemotherapy, excluding Pre-Clinical Models: Poster I
Saturday, December 5, 2015, 5:30 PM-7:30 PM
Hall A, Level 2 (Orange County Convention Center)

Alexey V Danilov, M.D. Ph.D.1, Hongli Li, PhD2*, Oliver W. Press3, Ilan Shapira, MD4, Lode J. Swinnen, MBChB5, Ariela Noy, MD6, Erin Reid, MD7, Sonali M. Smith, MD8 and Jonathan W. Friedberg, MD, MMSc9

1OHSU Knight Cancer Institute, Portland, OR
2SWOG Statistical Center, Seattle, WA
3Fred Hutchinson Cancer Rsch. Ctr., Seattle
4Hematology-Oncology, Mount Sinai Beth Israel, New York, NY
5Medical Oncology, Johns Hopkins, Baltimore, MD
6Department of Medicine, Lymphoma Service, Memorial Sloan Kettering Cancer Center, New York, NY
7University of California at San Diego, San Diego, CA
8University of Chicago, Chicago, IL
9University of Rochester, Rochester, NY

Background: The risk of HL is 10-fold higher in HIV-infected individuals than in the background population. Patients with HIV-HL typically present with advanced stage disease and frequent extranodal sites of involvement, accounting for higher risk scores than HIV-negative counterparts. Despite that, the prognosis of HIV-HL in the HAART era has been favorable. Standard ABVD (adriamycin, bleomycin, vinblastine, dacarbazine) results in complete response rates (74%) and five-year overall survival (80%) similar to those in non-HIV-HL. Thus, as in HIV-negative HL, exploration of response-adapted therapy in HIV-HL is well-justified. PET imaging after 2 cycles of chemotherapy was found to be a strong predictor of treatment outcome in patients with non-HIV-HL. Here, for the first time, we report on the outcomes of HIV-positive patients enrolled on S0816, a multicenter Phase 2 trial of response-adapted therapy of stage III-IV HL using interim FDG-PET imaging.

Methods: HIV-positive patients aged 18-60 with previously untreated stage III-IV classical HL were eligible. Patients with multi-drug resistant HIV or concurrent AIDS-defining conditions were excluded. All patients received 2 cycles of ABVD followed by an interim PET, reviewed centrally. Patients with negative PET (Deauville≤3) subsequently received 4 additional cycles of ABVD, while PET-positive patients received 6 cycles of BEACOPP standard regimen (bleomycin, etoposide, adriamycin, cyclophosphamide, vincristine, procarbazine and prednisone).

Results: 12 patients with HIV-HL received study treatment. Median age was 44.6 years (range, 25 to 50 years), 83.3% were male. 11/12 (91.6%) patients presented with bulky lymphadenopathy (≥10 cm) and 50% had poor risk international prognostic score (IPS≥4). 6/12 (50%) patients manifested B-symptoms and 33.3% had bone marrow involvement by HL. Where information was available, most patients (7/9, 77.8%) received concurrent HAART during chemotherapy. Median CD4 count prior to registration was 165/µL (range, 22-400/µL), and <100/µL in 5/12 pts (41.7%).

All HIV-HL patients successfully completed 2 initial cycles of ABVD. Gr 4 neutropenia and gr 3 febrile neutropenia were common during this treatment (66% and 25%, respectively). 10/12 (83.3%) patients achieved PET-negative status and 2 remained PET-positive with Deauville scores of 4 and 5. All PET-negative patients continued therapy with ABVD. Of those, nine completed the 4 cycles of treatment and one discontinued early for progressive disease 4 months after registration on study. Of the PET-positive patients, one elected to receive ABVD therapy off the study protocol, while the other completed 6 cycles of BEACOPP; both achieved a partial response. Thus, following ABVD therapy, 82% of patients achieved complete response and 18% - partial response. With median follow-up of 31 months (range, 5.4-38.1 months) all study patients are alive. Two patients developed progressive disease, with the estimated progression-free survival of 83% at 2 years (95% CI, 46.1 to 95.3%). Most grade 3-4 adverse events with continued therapy were neutropenia (72.7%) and febrile neutropenia (27.2%), while other toxicities were uncommon (see Table). All 12 patients experienced at least one grade 3-4 toxicity during study treatment. 3 patients (25%) required dose reductions due to febrile neutropenia (N=2) and neuropathy (N=1).

Conclusions. ABVD is highly effective in patients with advanced stage poor-risk HIV-HL and induces PET-negative responses at a similar rate without undue added toxicity as compared to non-HIV patients in a prospective trial setting. As response-adapted therapy evolves to be a standard approach for HIV-negative patients with advanced stage HL, the results of S0816 study presented here support a similar investigative approach in patients with HIV-HL, with the goal of reducing long-term toxicity. The role of intensified chemotherapy regimens in patients with HIV-HL who do not achieve PET-negative status needs further study. 

Toxicity

Grade 3, N (%)

Grade 4, N (%)

Anemia

2 (18.2)

2 (18.2)

Febrile neutropenia

3 (27.2)

 -

Lymphopenia

1 (9.1)

2 (18.2)

Neutropenia

2 (18.2)

6 (54.5)

Thrombocytopenia

1 (9.1)

 -

Infection

2 (18.2)

 -

Anorexia

1 (9.1)

 -

Dizziness

1 (9.1)

 -

Fatigue

1 (9.1)

 -

Hypophosphatemia

1 (9.1)

 -

Musculoskeletal pain

1 (9.1)

 -

Thrombosis

1 (9.1)

 -

Disclosures: Smith: Pharmacyclics: Consultancy ; Celgene: Consultancy .

*signifies non-member of ASH