Abstract Library

#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,

#4658 The nutritional status worsens over 5 years in patients with gastroenteropancreatic neuroendocrine tumours on treatment with somatostatin analogues

Introduction: Malnutrition is common in patients with gastroenteropancreatic neuroendocrine tumours (GEP-NETs) treated with monthly somatostatin analogues (SSAs). Ideally all malnourished patients are offered nutritional support. However, clinical guidelines and data on the development and progression of malnutrition is lacking.

Conference:

Presenting Author: Clement D

Authors: Soran V, Srirajaskanthan R, Cananea E, Martin W, Minott S,

Keywords: gastroenteropancreatic neuroendocrine tumour, malnutrition, somatostatin analogue,

#4656 Development of a 3D patient-derived extracellular matrix hydrogel model of small intestinal neuroendocrine tumour and mesenteric fibrosis

Introduction: The pathogenesis of mesenteric fibrosis in small intestinal neuroendocrine tumours (SI-NETs) is poorly understood, limiting development of effective treatments and biomarkers. A major barrier to research is the lack of disease models.

Conference:

Presenting Author:

Authors: Hodgetts H, Martins M, Luong T, Hall A, Webster A,

Keywords: small intestine, neuroendocrine, 3D model, hydrogel, fibrosis,

#4655 A novel nonpeptide drug conjugate (NDC) for the treatment of somatostatin receptor 2-expressing tumours

Introduction: Somatostatin receptor 2 (SST2) is an established target for the treatment of NETs and potentially other solid tumours.

Conference:

Presenting Author:

Authors: Zhao J, Sturchler E, Yang B, Chen M, Tang Y,

Keywords: somatostatin, solid tumour, drug conjugate, internalisation, cytotoxicity,

#4654 Usefulness of soluble tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) and its receptors R2 and R3 in progression assessment of gastroenteropancreatic neuroendocrine neoplasms – A preliminary study

Introduction: TRAIL is a member of TNF family and appears in membrane and soluble (s) forms. It acts either triggering (R1 and R2) or blocking (R3 and R4) apoptosis. TRAIL targeted therapy is widely studied and known as potentially effective in number of neoplasms.

Conference:

Presenting Author: Kaczmarska-Turek D

Authors: Kaczmarska-Turek D, Radziszewski M, Matałowski M, Liszcz A, Bartoszewicz Z,

Keywords: gastroenteropancreatic neuroendocrine neoplasm, tumour necrosis factor-related apoptosis-inducing ligand, tumour progression, PRRT, TRAIL, GEP-NEN,