Fig. 1.

Fig. 2.

Fig. 3.

Table showing the differential diagnosis according to BCC types
| Cleft cyst | Differential diagnosis |
|---|---|
| 1st | Abscesses |
| 2nd | Lymphatic malformations |
| 3rd | Lymphatic malformations |
| 4th | Necrotic lymph nodes |
1st cleft cyst: in the inferior pole of the parotid gland one can observe a cystic-like lesion of multilobular borders, septa that are of low vascularity on color Doppler, and thick content, attached to the lateral borders
| Type | Total number | Male to female ratio | Density | Doppler ultrasound (internal or peripheral vasculature increase/no flow) |
|---|---|---|---|---|
| 1st cleft | 9 | 5/4 | All hypoechoic | 2/7 |
| 2nd cleft | 16 | 7/9 | Hypoechoic/hyperechoic (1 case)/mixed (1 case) | 1 (1 inconclusive)/14 |
| 3rd cleft | 3 | 2/1 | All hypoechoic | 0/3 |
| 4th cleft | 2 | 1/1 | All hypoechoic | 0/2 |
| Inconclusive | 3 | 1/2 | All hypoechoic | 0/3 |