Purpose To determine the prevalence of insulin-like growth factor-1 (IGF-1) normalization with long-term multimodality therapy in a pituitary center and to assess changes over time. Methods Patients with acromegaly (N = 409), with ≥1 year of data after surgery and at least 2 subsequent clinic visits were included in long-term analysis (N = 266). Biochemical data, clinical characteristics, and therapeutic interventions were reviewed retrospectively. Results At diagnosis, mean [standard deviation] age was 43.4 [14.3] years, body mass index was 28.5 (24.9–32.1) kg/m2 (median, interquartile range), serum IGF-1 index (IGF-1 level/upper limit of normal) was 2.3 [1.7–3.1], and 80.5% had macroadenomas. Patients with transsphenoidal surgery after 2006 were older [46.6 ± 14.3 vs 40.0 ± 13.4 years; P < 0.001]. Age and tumor size correlated inversely. Overall (N = 266), 93.2% achieved a normal IGF-1 level during 9.9 [5.0–15.0] years with multimodality therapy. The interval to first normal IGF-1 level following failed surgical remission was shorter after 2006: 14.0 (95% confidence interval, 10.0–20.0) versus 27.5 (22.0–36.0) months (P = 0.002). Radiation therapy and second surgery were rarer after 2006: 28 (22%) versus 62 (47.0%); P < 0.001 and 12 (9.4%) versus 28 (21.2%); P = 0.010, respectively. Age at diagnosis increased over time periods, possibly reflecting increased detection of acromegaly in older patients with milder disease. Male gender, older age, smaller tumor and lower IGF-1 index at diagnosis predicted long-term sustained IGF-1 control after surgery without adjuvant therapies. Conclusion The vast majority of patients with acromegaly can be biochemically controlled with multimodality therapy in the current era. Radiotherapy and repeat pituitary surgery became less frequently utilized over time. Long-term postoperative IGF-1 control without use of adjuvant therapies has improved.

127 Background: Disruption of the immune system with immune checkpoint inhibitors can result in a multitude of immune-related adverse effects (irAE). While irAEs have been well-reported in clinical trials, the impact and magnitude of irAE’s in the real-world, particularly inpatient is unclear. Methods: Data was collected on patients with advanced malignancy who experienced a suspected irAE needing admission to an academic hospital (Feb 2011 to June 2017). Each case was reviewed comprehensively by minimum of two reviewers, including one sub-specialist. In addition, oncologists at our institution were surveyed regarding their confidence about managing patients with irAEs. Results: Over a span of 6 years, there were 343 hospitalizations for suspected irAEs and the majority (65%; N = 223) were confirmed irAEs that required treatment with immunosuppression or therapy stopped as result. The mean length of stay was 6.3 days (range 1 to 31 days), readmission rate for another irAE event 25%, total readmission rate 61.7%, and inpatient mortality 8%. The most common irAEs were enterocolitis (43.9%), pulmonary (16%), hepatic (15%), neurological (8.9%), endocrinopathies (7.1%), rheumatological (4%), dermatological (3%), cardiovascular (3%), renal (1.8%), and allergy (1.3%). Over the past 5 years, there was a significant increase in admissions due to irAEs (admissions in 2016 vs 2011, odds ratio = 3.07; p < 0.01). The Cancer Center survey (N = 26) revealed majority of oncologists do not feel very comfortable managing irAEs, and 48% felt that irAE complications should be managed on a different service. Conclusions: irAEs from immune checkpoint inhibitors can result in prolonged hospitalizations, high rate of readmissions, and mortality. The number of patients admitted due to irAEs has significantly increased by more than three-fold in the recent years, but majority of oncologists do not feel very comfortable managing irAEs. Consequently, there is a critical need for coordinated multidisciplinary approach, comprehensive provider education, and translational research program for early detection and intervention.

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BackgroundIn 2017, Massachusetts General Hospital implemented the Severe Immunotherapy Complications (SIC) Service, a multidisciplinary care team for patients hospitalized with immune-related adverse events (irAEs), a unique spectrum of toxicities associated with immune checkpoint inhibitors (ICIs). This study’s objectives were to evaluate the intervention’s (1) effect on patient outcomes and healthcare utilization, and (2) ability to collect biological samples via a central infrastructure, in order to study the mechanisms responsible for irAEs.MethodsA hospital database was used to identify patients who received ICIs for a malignancy and were hospitalized with severe irAEs, before (April 2, 2016–October 3, 2017) and after (October 3, 2017–October 24, 2018) SIC Service initiation. The primary outcome was readmission rate after index hospitalization. Secondary outcomes included length of stay (LOS) for admissions, corticosteroid and non-steroidal second-line immunosuppression use, ICI discontinuation, and inpatient mortality.ResultsIn the pre-SIC period, 127 of 1169 patients treated with ICIs were hospitalized for irAEs; in the post-SIC period, 122 of 1159. After SIC service initiation, reductions were observed in irAE readmission rate (14.8% post-SIC vs 25.9% pre-SIC; OR 0.46; 95% CI 0.22 to 0.95; p=0.036) and readmission LOS (median 6 days post-SIC vs 7 days pre-SIC; 95% CI −16.03 to –0.14; p=0.046). No significant pre-initiation and post-initiation differences were detected in corticosteroid use, second-line immunosuppression, ICI discontinuation, or inpatient mortality rates. The SIC Service collected 789 blood and tissue samples from 234 patients with suspected irAEs.ConclusionsThis is the first study to report that establishing a highly subspecialized care team focused on irAEs is associated with improved patient outcomes and reduced healthcare utilization. Furthermore, the SIC Service successfully integrated blood and tissue collection safety into routine care.

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