7.20.20
Publication Date: 2020-07-20
History
8 year old great Dane. Mass on the pes.
3 images
Findings
Dorsoplantar, lateral and splayed toe radiographs of the left pes is are acquired.
Left Pes: Lateral to the fifth digit proximal phalanx, there is a round, 3.6 cm diameter mass. This mass contains numerous, round, well-defined mineral opaque structures and stippled mineralization, with a thick soft tissue opaque periphery. There is mild soft tissue swelling that tapers proximally from the level of the mass. The adjacent proximal phalanx is normal with no evidence of lysis.
Diagnosis
Discussion
Here is a good retrospective article:
https://onlinelibrary.wiley.com/doi/full/10.1111/j.1439-0442.2004.00675.x
Calcinosis circumscripta is an uncommon syndrome of ectopic idiopathic, dystrophic, metastatic or iatrogenic mineralization characterized by deposition of calcium salts in soft tissues. This paper is a retrospective study of 77 canine cases. The age of dogs in the study varied from 4 months to 15 years and 55% were <1 year old, 74% <2 years old and 88% <4 years old. Several pure and mixed, typically large breed dogs were affected so that 28.6, 13 and 9% were German Shepherd, Rottweiler and Labrador Retriever respectively. The size of lesions varied from 2 mm to 13 cm in diameter but most lesions were between 0.5 cm and 3 cm in diameter. Lesions were solitary in 82% of the affected dogs, and occurred most commonly on the hind feet (50%) and tongue (23%). With multiple lesions there was no apparent body symmetry. Microscopically, most lesions were well‐defined single or multiple variably sized aggregates of amorphous to granular, lightly to darkly basophilic material with or without peripheral granulomatous reaction and surrounded by varying amounts of fibrous connective tissue. Additionally, three small nodular masses in the wall of the jejunum of a dog were diagnosed as calcinosis circumscripta. This is the first reported case of idiopathic intestinal calcinosis circumscripta in the dog.
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