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Osteomalacia With Hyperostosis in Captive Lesser Hedgehog Tenrecs (Echinops telfairi). 2020

Elise E B LaDouceur, and Brian G Murphy, and Michael M Garner, and Andrew N Cartoceti
241876Joint Pathology Center, Silver Spring, MD, USA.

Four captive, lesser hedgehog tenrecs (Echinops telfairi) were euthanized for soft bones that prevented normal mastication and/or ambulation. Antemortem radiographs (available in 2 cases) revealed osteopenia. Antemortem bloodwork (available in 2 cases) revealed hypophosphatemia. Dietary history (available in 2 cases) indicated the animals were eating only insects. Histologically, all examined bones had wide osteoid seams that caused expansion of the cortices. Osteoid deposition was exuberant and it partially filled marrow cavities (hyperostosis). Nondecalcified sections of bone (available in 2 cases) revealed that osteoid was poorly mineralized, consistent with osteomalacia. Insects are poor dietary sources of vitamin D, and dietary vitamin D deficiency is considered the most likely cause for metabolic bone disease in these animals.

UI MeSH Term Description Entries
D007312 Eulipotyphla An order of insect eating MAMMALS including MOLES; SHREWS; HEDGEHOGS. Insectivora,Soricomorpha
D010018 Osteomalacia Disorder caused by an interruption of the mineralization of organic bone matrix leading to bone softening, bone pain, and weakness. It is the adult form of rickets resulting from disruption of VITAMIN D; PHOSPHORUS; or CALCIUM homeostasis. Adult Rickets,Rickets, Adult
D001842 Bone and Bones A specialized CONNECTIVE TISSUE that is the main constituent of the SKELETON. The principal cellular component of bone is comprised of OSTEOBLASTS; OSTEOCYTES; and OSTEOCLASTS, while FIBRILLAR COLLAGENS and hydroxyapatite crystals form the BONE MATRIX. Bone Tissue,Bone and Bone,Bone,Bones,Bones and Bone,Bones and Bone Tissue,Bony Apophyses,Bony Apophysis,Condyle,Apophyses, Bony,Apophysis, Bony,Bone Tissues,Condyles,Tissue, Bone,Tissues, Bone
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014807 Vitamin D A vitamin that includes both CHOLECALCIFEROLS and ERGOCALCIFEROLS, which have the common effect of preventing or curing RICKETS in animals. It can also be viewed as a hormone since it can be formed in SKIN by action of ULTRAVIOLET RAYS upon the precursors, 7-dehydrocholesterol and ERGOSTEROL, and acts on VITAMIN D RECEPTORS to regulate CALCIUM in opposition to PARATHYROID HORMONE.
D015576 Hyperostosis Increase in the mass of bone per unit volume. Bone Hypertrophy,Bone Hypertrophies,Hyperostoses,Hypertrophies, Bone,Hypertrophy, Bone

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