🔬 Discovery

Discovery of the pancreatic islets

Descubrimiento de los islotes pancreáticos

Date
1869 · confidence high
Place
Berlin, Germany
Credited to
Paul Langerhans
Field
Life & health

What was discovered

In his thesis on microscopic anatomy, medical student Paul Langerhans describes clusters of cells in the pancreas distinct from the surrounding digestive tissue, not yet knowing their endocrine function.

The endocrine function of these 'islets of Langerhans' (name coined later by Gustave-Édouard Laguesse) was not understood until the discovery of insulin decades later.

What it led to

  • Later identification of insulin in these cells (Banting and Best, 1921)
  • Modern understanding of diabetes mellitus
  • Birth of pancreatic endocrinology
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Made possible

Links

Sources✓ verified 2026-09-25