Tumoral Calcinosis Form of Hydroxyapatite Deposition Disease in Related Red-Bellied Short-Necked Turtles, Emydura subglobosa

R. E. Burns, E. J. Bicknese, Joellen L Westropp, R. Shiraki, I. H. Stalis

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Ten of 12 red-bellied short-necked turtles from a single clutch presented at 9 months of age with multiple white to tan nodules on their feet. Histologically, the nodules were composed of large periarticular deposits of mineralized crystalline material that extended into the joint spaces of interphalangeal joints and was surrounded by granulomatous inflammation and fibrosis. Crystallographic analysis determined the material to be apatite (calcium phosphate hydroxide) consistent with the tumoral calcinosis form of hydroxyapatite deposition disease (HADD). HADD has previously been described in aquatic turtles and rarely lizards and must be differentiated from gout in reptiles. A cause for the tumoral calcinosis lesions in these turtles could not be determined; however, based on previous reports in this species, a species-specific predilection, in conjunction with unknown environmental factors, is suspected. The use of the terms HADD, pseudogout (calcium pyrophosphate crystal deposition disease), and calcinosiscircumscripta has been inconsistent, creating confusion in the literature.

Original languageEnglish (US)
Pages (from-to)443-450
Number of pages8
JournalVeterinary Pathology
Volume50
Issue number3
DOIs
StatePublished - May 2013

Keywords

  • apatite
  • calcinosis circumscripta
  • calcium phosphate
  • crystallography
  • hydroxyapatite deposition disease
  • pseudogout
  • tumoral calcinosis
  • turtle

ASJC Scopus subject areas

  • veterinary(all)

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