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Interactive case study: Recognition and management of pancreatogenic (type 3c) diabetes

David Morris
Specialist Doctor in Diabetes, Royal Shrewsbury Hospital; Undergraduate Clinical Tutor, Keele University; and retired GP
This interactive case study takes you through the basic considerations of identifying and managing pancreatogenic (type 3c) diabetes. The case illustrates the need to undertake a careful review of the patient’s history in determining an underlying cause of diabetes, and to be open to a change in diagnosis and management. Type 3c diabetes is frequently misclassified (often as type 2 diabetes) and so prevalence is underestimated in practice. By actively engaging with this case history, you should feel more confident and empowered to manage effectively such a problem in the future. Click here to access the case study.

Diabetes & Primary Care’s series of interactive case studies is aimed at all healthcare professionals in primary and community care who would like to broaden their understanding of diabetes.

Type 3c diabetes is frequently misclassified (often as type 2 diabetes) and so prevalence is underestimated in practice. The case study in this issue of the journal takes us through the basic considerations of identifying and managing pancreatogenic (type 3c) diabetes.

The format uses typical clinical scenarios as tools for learning. Information is provided in short sections, with most ending in a question to answer before moving on to the next section.

Working through the case studies will improve our knowledge and problem-solving skills in diabetes care by encouraging us to make evidence-based decisions in the context of individual cases.

Readers are invited to respond to the questions by typing in your answers. In this way, we are actively involved in the learning process, which is hopefully a much more effective way to learn.

By actively engaging with these case histories, we hope you will feel more confident and empowered to manage such presentations effectively in the future.

Sarah, 57 years old, was diagnosed with type 2 diabetes two years ago, with a BMI of 27.6 kg/m2. Hyperglycaemia was reasonably controlled on metformin M/R 1 g twice daily, such that her HbA1c four months previously was 61 mmol/mol and she had chosen to focus on lifestyle measures to improve glycaemic control.

Sarah had, however, become unwell of late. She saw her GP with symptoms of marked tiredness, thirst, polyuria (especially at night), genital thrush and weight loss of half a stone over the last month or so. Fingerprick testing showed a capillary blood glucose of 17.8 mmol/L, with ketones of 0.2 mmol/L. An HbA1c came back later at 108 mmol/mol.

What further information might be useful here? What are the implications of Sarah’s sudden deterioration in glycaemic control?

By working through this interactive case study, we will consider the following issues and more:

  • Diagnosing less common types of diabetes.
  • Signs and symptoms of pancreatogenic (type 3c) diabetes.
  • Managing hyperglycaemia in pancreatogenic diabetes.
  • Pancreatic exocrine deficiency (PEI) and pancreatic enzyme replacement therapy (PERT).
  • “Brittle diabetes” and other clinical concerns.

Click here to access the case study.

Related content
Poster abstract book: 20th National Conference of the Primary Care Diabetes Society
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Free for all UK & Ireland healthcare professionals

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