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Intraoperative ultrasound with palpation is still superior to intra-arterial calcium stimulation test in localising insulinoma

Wong M, Isa SH, Zahiah M, Azmi KN

World J Surg, 2007 Mar;31(3):586-92.
PMID: 17322973

This study assessed the sensitivities of preoperative localisation modalities such as computed tomography (CT), magnetic resonance imaging (MRI), arteriography and arterial stimulation venous sampling (ASVS) using serum insulin and C-peptide gradients to intraoperative techniques in localising insulin-secreting tumours in our institution.

Matched MeSH terms: Insulinoma/blood; Insulinoma/surgery; Insulinoma/ultrasonography*
Fulltext Insulinoma aggravating or masquerading as late-onset schizophrenia?

Chien, K.Y.

Malaysian Journal of Psychiatry, 2013;22(2):72-75.
MyJurnal

A 76 year-old lady with late-onset schizophrenia was admitted with hypoglycaemia. She was later found to have a pancreatic tail insulinoma, confirmed biochemically and radiologically. She is treated medically with Diazoxide while awating laparascopic enucleation of the pancreatic tumour. The question remains if neuroglycopenia aggravates co-existing schizophrenia or if insulinoma-induced neuroglycopenia had been misdiagnosed as schizophrenia.

Matched MeSH terms: Insulinoma
Fulltext Benign insulinoma--a diagnostic challenge: a case report

Fock KM, Nambiar R

Med J Malaysia, 1984 Jun;39(2):170-2.
PMID: 6096683

A 22-year-old Malay man with recurrent hypoglycaemic fainting spells was found to have hyperinsulinism. Although the CT scan of the abdomen and arteriogram failed to demonstrate any tumour in the pancreas, three tumours were found in the body of the pancreas at laporatomy, An appraisal of the techinques currently available for diagnosis and localisation of insulinoma is presented.

Matched MeSH terms: Insulinoma/diagnosis*
Fulltext A case report on a protracted course of a hidden insulinoma

Mohamed Shah FZ, Mohamad AF, Zainordin NA, Eddy Warman NA, Wan Muhamad Hatta SF, Abdul Ghani R

Ann Med Surg (Lond), 2021 Apr;64:102240.
PMID: 33868680 DOI: 10.1016/j.amsu.2021.102240

Introduction: Insulinoma is a functioning pancreatic neuroendocrine tumor primarily leading due to hypoglycemia due to hypersecretion of insulin. This case illustrates the real challenges faced in the detection of an occult insulinoma, which resulted in a protracted course of the disease.
Case presentation: A 33-year-old female presented with recurrent hypoglycemia. Endogenous hyperinsulinemia was confirmed by a prolonged fast, however serial imaging was negative. Incidental finding of an ovarian mass gave rise to the suspicion of an insulin-producing ovarian tumor. Subsequent multimodality pancreatic imaging remained negative, requiring more invasive investigations. The tumor was localized by specialized arteriography using calcium stimulation to support the diagnosis of an insulinoma. However, repeated negative imaging led to further delays in definitive management, with worsening hypoglycemia. The surgery was finally performed three years after the initial presentation with successful removal of the tumor using intra-operative ultrasound.
Clinical discussion: It is important to emphasize that preoperative radiological imaging is useful to localize pancreatic lesions. However, most insulinomas could only be detected intraoperatively. The absence of suggestive radiological evidence should not deter surgeons from proceeding with definitive surgical intervention.
Conclusion: The case highlights the importance of a multidisciplinary approach in the management of a complicated case.

Matched MeSH terms: Insulinoma
Fulltext A ten-year retrospective analysis of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in Malaysia

Gunavathy M, Rohana AG, Norlela S, Nor Azmi K

Med J Malaysia, 2014 Jun;69(3):133-7.
PMID: 25326355 MyJurnal

Gastroenteropancreatic neuroendocrine tumours (GEP- nETs) are rare neoplasms with a complex spectrum of presentation. The study cohort (n=64) included the diagnoses of carcinoid, (n=26, 41%), insulinoma, (n=25, 39%), undetermined (n=10, 16%), VIPoma, glucagonoma and multiple endocrine neoplasia (MEn-1) (n= 3). Almost half of the patients (n=31) had distant metastasis at diagnosis, the commonest being carcinoid tumours. Presenting symptoms were due to either hormonal expressions or mass effects. diagnoses in all patients were made based on positive immunohistochemical staining for chromogranin and synaptophysin. Less than half (n=30) had either serum chromogranin A, urinary 5-hydroxyindole acetic acid (5-hIAA), serum insulin or C-peptide levels performed. Commonest diagnostic imaging modalities were computed tomography (CT) scan (94%) and abdominal ultrasound (15%). Curative or palliative surgery was performed in 58 patients. Systemic therapy included long acting somatostatin analogues (n=14), chemotherapy (n=7) and interferon-α2b (n=1). nine patients died, all of who had metastatic disease at diagnosis. All patients with insulinoma (n=25) were assessed by endocrinologists whilst carcinoid tumours were mainly managed by surgeons (n=16/26). Involvements of oncologists and gastroenterologists were minimal. This study showed that patients with GEP-nETs in Malaysia commonly presented late in the disease with presence of distant metastases. Less than half had adequate hormonal and biochemical examinations performed for diagnostic as well as prognostic purposes, and only a third received systemic therapy. Lack of institutionalbased database, clinical expertise and multi-disciplinary involvement contributed to the inadequate surveillance and management of the disease.

Matched MeSH terms: Insulinoma