Article Text

  1. K Sijstermans1,
  2. W W Hack1,
  3. L M van der Voort-Doedens1,
  4. R W Meijer2,
  5. H A Heij3,
  6. H A Delemarre-van de Waal4,
  7. F H Pierik5
  1. 1Department of Paediatrics, Medical Center Alkmaar, Alkmaar, The Netherlands
  2. 2Department of Surgery, Medical Center Alkmaar, Alkmaar, The Netherlands
  3. 3Department of Paediatric Surgery, Paediatric Surgical Center of Amsterdam, Emma, Amsterdam, The Netherlands
  4. 4Department of Paediatrics, VU University Medical Center, Amsterdam, The Netherlands
  5. 5Department of Reproduction and Perinatology, TNO Quality of Life, Leiden, The Netherlands


In this article, state of the art on undescended testis (UDT), a common urogenital abnormality in boys, is presented.

An UDT is defined as a testis, which can not be brought into a stable scrotal position. At present, congenital and acquired forms are recognised. A congenital-UDT is defined as an UDT which has never since birth been descended. An acquired-UDT is defined as an UDT which has been fully descended previously.

Congenital-UDT should be treated surgically between 6 to 12 months of age. The treatment of acquired-UDT is still heavily under debate. Awaiting spontaneous descent at (early) puberty seems to be the most proper treatment.

In the Netherlands, a large number of (late) orchidopexies is due to surgery on acquired-UDT. In order to reduce this large number, the conclusions of the Dutch Development Conference on ‘non-scrotal testis’ should be revised. Likewise, recognition of congenital-, and acquired-UDT as separate entities should lead to a reduced orchidopexy (ORP)-rate in other countries.

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