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Table 1 Characteristics of canine OS tissues (n = 40) used for this study

From: Reference gene validation for gene expression normalization in canine osteosarcoma: a geNorm algorithm approach

Parameter n %
Histological subtypea   
 OB + FB 12 30
 OB + TL 5 12.5
 OB + CB + FB 7 17.5
 OB + FB + TL 2 5
 OB 14 35
Histological grade   
 High 28 70
 Medium-low 12 30
Necrosis   
  < 50% (low) 12 30
  > 50% (high) 28 70
Sex   
 Female 14 35
 Male 26 65
Neuter status   
 Intact 22 55
 Neutered 18 45
Location of primary tumor   
 Extraskeletal 1 2.5
 Femur 1 2.5
 Humerus 8 20
 Mandible/maxilla 3 7.5
 Radius/ulna 14 35
 Rib 2 5
 Scapula 3 7.5
 Tibia/fibula/metatarsus 8 20
  1. a CB chondroblastic, FB fibroblastic, OB osteoblastic, TL telangiectic