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

Table 1 Previoous reported cases of primary ESOS in gasatrointestinal tract

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

ISSN: 1752-1947