Table 1.

– Reported cases of extraosseous osteosarcoma in head and neck

	Luna- Ortiz et al. [2]	Manning JT et al. [3]	Hatano et al. [4]	Saito et al. [5]	Stimson et al. [6]	Kosec et al. [7]	Adeyemo et al. [8]	Huang EC et al. [9]	Hamamoto et al. [10]	Xin Ge et al. [11]	Zhang et al. [12]	Aslan et al. [13]	Our case
Age (years)	74	73	25	17	63	48	46	62	47	51	81	69	20
Gender	Female	Male	Male	Male	3 male and 1 female	Female	Male	Male	Male	Male	Male	Male	Male
Localization	Right submandibular region	Parotid gland	Right mandibular angle	Left submandibular region	Parotid	Right neck	Parotid	Parotid	Parotid gland	Parotid gland	Right neck subcutaneous tissue	Parapharyngeal space	Parotid
Tumour diameter (cm)	12	3	1.5	6.5	3–6	6	16	6	6	4	4	5	12
Follow up	Died within 1 year	Lost to follow up	Disease free – 2 years	Died within 1 year	3 died of metastatic disease within 2 years, 1 was lost to follow up	Died of metastatic disease after 1 year	Disease free – 4 months	Died due to metastatic disease in 6 months	Died due to metastatic disease in 17 months	Died due to local recurrence and distant metastasis in 13 months	Disease free – 2 years	Disease free – 6 months	Disease free after 6 months
Treatment	Surgery and palliative radiotherapy	Surgery	Surgery and chemoradiotherapy	Surgery and chemoradiotherapy	Surgery	Surgery	Surgery and chemoradiotherapy	Surgery and chemoradiotherapy	Surgery and raditherapy	Surgery and chemotherapy	Multiple surgeries with radiotherapy	Surgery and chemotherapy	Surgery and radiotherapy