Salvage surgery for patients with residual/persistent diseases after improper or insufficient treatment of oral squamous cell carcinoma: can we rectify these mistakes?

Table 4 Correlations between clinicopathological characteristics between initial and residual/persistent OSCCs

Initial treatment	Residual retreatment	p values
Primary T stage	Residual subgroup	< 0.001
	Size of residual OSCC	< 0.001
	rOSCC involving vital structures	0.017
	Salvage treatment combinations	< 0.001
	Salvage resection and reconstruction	0.001
Neoadjuvant therapy for primary OSCC	Size of residual OSCC	0.024
	Salvage treatment combinations	0.002
	Salvage resection and reconstruction	0.011

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