JOURNAL OF HOSPITAL GENERAL MEDICINE

JOURNAL OF HOSPITAL GENERAL MEDICINE
MAY 2019 Volume 1

Case report
Insulinoma diagnosed in a patient presenting
with transient amnesia・・・・・・・・・・Shin Watanabe  1

Brief report
Retention cysts due to latent pancreatic
cancer・・・・・・・・・・Kosuke Oka  6

JHGM 2019:1:1-5

― Case report ―

Insulinoma diagnosed in a patient presenting

with transient amnesia

Shin Watanabe MD, PhD.1)※  Osamu Nomura MD.1)
Yuichiro Haba MD, PhD.2)  Koichiro Aihara MD, PhD.1)
1)Department of Emergency and Disaster Medicine,
Juntendo University Faculty of Medicine
2)Department of General Medicine, Juntendo University Faculty of Medicine

Abstract
An insulinoma is a pancreatic tumor that secretes excessive quantities of insulin that cause hypoglycemia. However, insulinoma is difficult to definitively diagnose in primary care practice. A previous study reported a median period of 2 years before an insulinoma was definitively diagnosed. A large number of patients with insulinomas present with neurological symptoms; thus, patients may be misdiagnosed and receive treatment for mental illness or epilepsy. Patients with prolonged hypoglycemia may progress without typical symptoms of hypoglycemia. Early diagnosis of the disease is possible by detailed inquiry and review of past medical examination data with which no symptom of the disease was detected. We report the case of a 43-year-old man who presented with recurrent transient amnesia and received an appropriate early differential diagnosis and prompt surgical treatment for insulinoma.

Key Words:insulinoma, transient amnesia, hypoglycemia

JHGM 2019:1:6

― Brief report ―

Retention cysts due to latent pancreatic cancer

Kosuke Oka, M.D., Ph.D.※ Shigeru Horiguchi, M.D., Ph.D.
Mikako Obika, M.D., Ph.D. Fumio Otsuka, M.D., Ph.D.
Department of General Medicine, Okayama University Graduate School of Medicine,
Dentistry and Pharmaceutical Sciences