Table 2.

Selection of clinically asymptomatic cases of calcaneus secundarius as described in the literature

Author(s), year of publication and Reference number	Size (length/width/height)	Identification
	[mm]
Stieda, 1869 [9]	3 cases, maximum size 15/8/5	Anatomical
Gruber, 1871 [15]	12/9/7	Anatomical
Pfitzner and Schwalbe, 1892 [6]	5 cases, maximum size 15/8/5	Anatomical
Laidlaw, 1905 [18]	3 cases, maximum 16.5/6.5/6.0	Anatomical
Mercer, 1931 [20]	4 cases, two maximum side lengths of a pyramid 20/13	Anatomical