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Table 1 Previoous reported cases of primary ESOS in gasatrointestinal tract

From: Anal extraskeletal osteosarcoma in a man: a case report and review of the literature

Author (Year) Reference number

Anatomic site

Age (year)

Gender

McIntyre et al. (1982) [10]

Esophagus

70

M

Erra et al. (2010) [9]

Esophagus

74

M

Nojima et al. (1986) [13]

Jejunum

23

M

Shimazu et al. (2001) [11]

Transverse colon

53

F

Iannaci et al. (2013) [12]

Rectum

81

F

Current case

Anal canal

70

M

  1. F female, M male