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,

#4648 Analysis of presentation and outcomes of mixed adenoneuroendocrine carcinoma (MANEC) – A single centre experience

Introduction: Mixed adenoneuroendocrine carcinoma (MANEC) is a rare neoplasm characterised by the coexistence of both adenocarcinoma and neuroendocrine carcinoma components. Due to its rarity, limited data exist regarding its clinical presentation, treatment strategies, and outcomes. This study provides an analysis of MANEC cases from a single centre, providing insights into its clinical features, diagnostic challenges, treatment strategies, and prognosis.

Conference:

Presenting Author: Khosla D

Authors: Khosla D, Kapoor R, Mehta A, Gupta R, Singh H,

Keywords: MANEC, mixed adenoneuroendocrine carcinoma, treatment,

#4646 Dysregulated miRNA in patients with GEP-NEN and potential role as circulating biomarker

Introduction: Neuroendocrine neoplasms (NENs) are a class of rare and molecularly extremely heterogeneous tumours. NENs arise predominantly in the gastrointestinal (GEP) and pulmonary tracts but can also involve thyroid and breast. NENs often present with non-specific symptoms and lack early specific biomarkers, leading to frequent metastatic diagnoses and primary site challenges.

Conference:

Presenting Author:

Authors: Di Mauro A, Clemente O, Cannella L, Della Vittoria G, Neri G,

Keywords: neuroendocrine tumour, miRNome profiling, biomarker, gep-net, molecular biology,

#4637 Non-functional retroperitoneal paraganglioma in a young patient: A case report

Introduction: Paragangliomas are neuroendocrine tumours arising in the parasympathetic nervous system, outside the adrenal gland. Retroperitoneal location is extremely rare. Non-functional paragangliomas often represent a diagnostic challenge.

Conference:

Presenting Author:

Authors: Aris H, Saidi M, Lahfa I,

Keywords: retroperitoneal paraganglioma, surgery, monitoring,

#4633 Mini invasive pancreatectomy for pancreatic neuroendocrine tumours: Current state of management in France

Introduction: Pancreatic neuroendocrine tumours (NETs) accounts for 2% of pancreatic tumours and their management is challenging. Surgery is the most radical treatment, but for small lesions, parenchyma sparing techniques are also used.

Conference:

Presenting Author: Muzzolini M

Authors: Muzzolini M, de Ponthaud C, Gaujoux S,

Keywords: laparoscopic NETs surgical outcomes,