System describing surgical field extension associated with flap reconstruction after resection of a superficial malignant soft tissue tumor

Table 1 C-value for flap location beyond the nearby large joint

	C-value	Description
Within the compartment	0	C0
Extra compartment	1: any	C1
	p: proximal	Cp
	d: distal	Cd

Table 2 D-value for surgical field extension for the pedicle dissection

Pedicle	D-value	Description
Already exposed	0	D0
Dissection of the pedicle	1: Any	D1
	p: Proximal	Dp
	d: Distal	Dd
	b: Within tumor bed	Db

Table 3 Possible classification of flap reconstruction

CD-grade	Transpositional flap	Pedicled flap	Free flap
C0D0	C0D0	Not applied	C0D0
C0D1	NA	C0Dp, C0Dd	C0Dp, C0Dd, C0Db
C1D0	CpD0, CdD0	NA	NA
C1D1	NA	CpDp, CdDd	NA

NA: Not available.

Table 4 Transpositional fasciocutaneous flap/propeller flap

Flap location	C-value	D-value	CD-grade
Within the compartment	0	0	C0D0
Extra compartment: from any	1	0	C1D0
From proximal	p	0	CpD0
From distal	d	0	CdD0

Table 5 Pedicled flap

Flap location	C-value	D-value (pedicle location)	CD-grade
Within the compartment	0	1 (any)	C0D1
From proximal	0	p (proximal)	C0Dp
From distal	0	d (distal)	C0Dd
Extra compartment	1	1 (any)	C1D1
From proximal	p	p (proximal)	CpDp
From distal	d	d (distal)	CdDd

Table 6 Free flap

Pedicle location	C-value	D-value (pedicle location)	CD-grade
Already exposed	0	0	C0D0
Necessary for dissection	0	1 (any)	C0D1
From proximal	0	p (proximal)	C0Dp
From distal	0	d (distal)	C0Dd
Within tumor bed	0	b (within tumor bed)	C0Db