Severe soft tissue ossification in a southern right whale Eubalaena australis
2012
The carcass of a stranded southern right whale Eubalaena australis, discovered on the coast of Golfo Nuevo in Peninsula Valdes, Argentina, exhibited extensive orthotopic and het- erotopic ossification, osteochondroma-like lesions, and early degenerative joint disease. Extensive soft tissue ossification led to ankylosis of the axial skeleton in a pattern that, in many respects, appeared more similar to a disabling human genetic disorder, fibrodysplasia ossificans progres- siva (FOP), than to more common skeletal system diseases in cetaceans and other species. This is the first reported case of a FOP-like condition in a marine mammal and raises important questions about conserved mechanisms of orthotopic and heterotopic ossification in this clade.
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