Non‐ossifying fibroma in phalanx of a Thoroughbred yearling

Abstract

Summary A fibrous lesion in the first phalanx of the foreleg of an 8‐month‐old castrated male Thoroughbred is identified as similar in every way to the condition recognised in humans and described as non‐ossifying fibroma. Surgical correction of this condition is outlined, the recovery indicated and histopathology discussed. Resúmé Une lésion fibreuse de la première phalange d'un antérieur chez un poulain hongre âgé de 8 mois a été identifiée dans tous ses aspects à une affection reconnue chez l'Homme et décrite comme étant un fibrome non ossifiant. On esquisse la correction chirurgicale de cette affection. Le processus de guérison est décrit et l'histopathologie est commentée. Zusammenfassung Eine fibröse Veränderung an einem vorderen Fesselbein eines 8 Monate alten Vollblutwallachs ist als identisch mit dem menschlichen nicht verknöchernden Fibrom erkannt worden. Die chirurgische Behandlung, die Heilung und die histopathologischen Befunde der Krankheit werden beschrieben.

Fibro‐osseous tumour of the fourth metacarpal bone in a horse: Clinical, radiographic and long‐term post operative findings

“…The 4 case reports of fibro‐osseous tumours of the appendicular skeleton in horses describe 3 different types of tumours. Attenburrow and Heyse‐Moore (1982) found a nonossifying fibroma of the first phalanx of an 8‐month‐old foal. Although diagnosed as a fibrous tumour, some spicules of osteoid bordered by osteoblasts were found within the mass.…”

Fibro‐osseous tumour of the second metacarpal bone in a Thoroughbred filly

“…Fibro‐osseous tumours of the equine appendicular skeleton are exceedingly rare and all reported cases have involved different tumour locations (Attenburrow and Heyse‐Moore 1982; Goedegebuure et al . 1983; Collins 1998; Rabuffo et al .…”

Nonossifying Fibroma in the Mandible of a Goat

“…4 In domestic animals, NOF is histologically characterized by sheets, whorls, and interlacing bundles of fibroblast-like spindle cells with numerous thin-walled blood vessels and varying numbers of multinucleated giant cells. 2,4,5 Osteoblastic differentiation or bone production by the spindle cells has not been observed. 5 An 8-year-old male Nubian goat in good nutritional condition was presented to the University of California Veterinary Teaching Hospital with a peracute history of straining to urinate.…”

“…13,16 Spontaneous regression in domestic animals has not been reported; however, no clinical or radiographic evidence of residual neoplasia was detected in 1 horse after surgical excision of a NOF. 2 A cytogenetic abnormality (reciprocal chromosomal translocation) was associated with a NOF in the tibia of an 18-year-old skeletally mature woman. 9 Although NOF is most often identified in the long bones, the tumor has been identified in the mandible of 11 human patients 3 and 1 horse.…”

“…7 Three cases of NOF have been reported in young Thoroughbred horses: in the proximal tibiae of a lame yearling filly, 5 in the first phalanx of a lame 8-month-old gelding, 2 and in the mandible of an 8-monthold-filly. 12 Cases of NOF have also been reported in the femur of a 6-year-old-cat and the rib of a sheep.…”