In this article five cases of intraspongious vertebral herniation of the nucleus pulposus (Schmorl's node) in harbour porpoises Phocoena phocoena and one in a white-beaked dolphin Lagenorhynchus albiro - stris are described. This condition has not previously been described for any cetacean species. Its etiology is most probably post-traumatic.

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Natuurhistorisch Museum Rotterdam

E.J.O. Kompanje, & M. García Hartmann. (2001). Intraspongious disc hernation (Schmorl’s node) in Phocoena phocoena and Lagenorhynchus albirostris (Mammalia: Cetacea, Odontoceti). Deinsea, 8(1), 135–142.