Abstract Library

#4667 Clinical outcomes in patients with typical (TC) and atypical bronchial carcinoids (AC): A 15-year retrospective study from an ENETS Center of Excellence

Introduction: Bronchial neuroendocrine neoplasms (NENs) can be subdivided into TCs, ACs and neuroendocrine carcinomas (NECs). Although a few studies have explored treatment approaches and oncological outcomes, most focus on surgical cohorts, small sample sizes, or mixed groups including TC, AC, and NECs. Real-life cohort data are lacking.

Conference:

Presenting Author: Clement D

Authors: Correia J, Sarker D, Dolly S, Frydman A, Srirajaskanthan R,

Keywords: bronchial carcinoid, treatment pattern, recurrence-free survival, overall survival,

#4666 Merkel cell neuroendocrine carcinoma of the skin: High response rates to short course palliative radiotherapy – Typical clinical scenarios

Introduction: Merkel cell carcinomas (MCC) are a rare, aggressive skin neuroendocrine carcinomas, with peak incidence in the elderly. MCC often presents as a firm, red/purple painless nodule with a short history of increasing size. Surgery is considered the 1st line treatment but elderly patients, in particular, have comorbidities which may preclude radical surgery requiring reconstruction. In advanced MCC, immunotherapy (IO) is 1st line systemic treatment. Chemotherapy is used 2nd line or if contraindications for IO but can be challenging in an elderly population. There may be an emerging role for PRRT due to the presence of somatostatin receptors on MCC. Radiotherapy (RT) can be used for non-surgical candidates, or those with unresectable or metastatic disease. Adjuvant post-operative irradiation (PORT) may provide additional benefit in risk reduction and improves local control.

Conference:

Presenting Author:

Authors: Saunders E, Sizer B, Collins J, Skelly R, Srinivasan G,

Keywords: Merkel cell, skin, radiotherapy,

#4563 Clinical case of a young woman with acromegaly, hyperprolactinemia and pituitary tumour with mixed morphology of adenoma and gangliocytoma

Introduction: Acromegaly is a rare disorder that develops due to persistent hypersecretion of somatotropic hormone in adults after closure of the growth plates. In the majority of cases, the cause is a pituitary adenoma.

Conference:

Presenting Author:

Authors: Markova M, Kirova I, Elenkova A, Robeva R, Zacharieva S,

Keywords: acromegaly, hyperprolactinemia, pituitary adenoma, gangliocytoma,

#4542 Results of active observation of pancreatic non-functioning neuroendocrine tumours – Medical registry data

Introduction: Algorithm for stage T1 pancreatic neuroendocrine tumours (PNETs) treatment requires clarification.

Conference:

Presenting Author:

Authors: Salimgereeva D, Feidorov I, Konyakhina A, Petrova A,

Keywords: Neuroendocrine tumour, PNET, pancreatic NET, management, active observation, follow-up, registry, CHEK2, oestrogen,

#4518 Efficacy and safety of cabozantinib (CABO) for advanced Grade 3 (G3) neuroendocrine tumours (NETs) after progression on prior therapy: Subgroup analysis of the phase III CABINET trial (Alliance A021602)

Introduction: Well-differentiated G3 NETs have been described as a distinct category recently, and randomised data regarding efficacy of therapy are scarce. In the phase 3 CABINET trial (NCT03375320), CABO significantly prolonged progression-free survival (PFS) compared with placebo (PB) in patients (pts) with advanced, previously treated, progressive well-differentiated extra-pancreatic NETs (epNETs) and pancreatic NETs (pNETs) of all grades (Chan et al., NEJM, 2024).

Conference:

Presenting Author: Strosberg J

Authors: Strosberg J, Zemla T, Geyer S, Pulsipher S, Behr S,

Keywords: cabozantinib, grade 3 neuroendocrine tumour, pancreatic neuroendocrine tumour, extra-pancreatic neuroendocrine tumour,