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Table 1 The clinical findings, pathologic features and treatment outcomes of the occult neoplasm of facial nerve

From: Bell’s palsy misdiagnosis: characteristics of occult tumors causing facial paralysis

Patient

Sex/age

Final diagnosis

Time to referral (mo)

Initial HB grade

Suspected occult neoplasm

Diagnostic Procedure

Recurrence

Follow-up (mo)

Final outcome

Diagnostic delay (mo)*

HB grade at referral

Reason for suspicion

Definitive treatment

1

F/69

Skin SCC

13

2

Yes

Facial nerve biopsy (parotidectomy approach)

No

46

NED

24

6

Progressive, irreversible

Chemoradiation treatment

2

M/33

Parotid ACC

8

5

No

Facial nerve biopsy (Incidental finding at facial reanimation surgery)

Regional recurrence, POD 40 mo- > Palliative treatment

68

AWD until last follow-up

15

5

Irreversible

Radical parotidectomy with neck dissection, temporal bone resection Postoperative radiation

3

M/58

Skin SCC

20

4

Yes

Transoral biopsy of inferior alveolar nerve (multiple cranial nerve invasion)

Stable disease

22

AWD

21

5

Progressive, irreversible

RT

4

M/50

Parotid ACC

15

2

Yes

Facial nerve biopsy

Lung metastasis, POD 32 mo-> salvage surgery

72

NED

19

6

Progressive, irreversible

Radical parotidectomy with neck dissection, temporal bone resection postoperative radiation

5

M/54

Skin SCC

12

2

Yes

Infraorbital nerve biopsy

Stable disease

30

AWD

21

6

Progressive, irreversible

CCRT

6

M/81

Skin SCC

28

5

Yes

Transmastoid biopsy

Progressive disease

36

AWD until last follow-up

34

6

irreversible

Clinical trial†

7

M/79

Facial nerve schwannoma

17

2

Yes

No biopsy‡

Stable disease

28

AWD

28

6

Progressive, irreversible

Regular follow-up

8

F/56

Facial nerve schwannoma

180

3

Yes

No biopsy‡

Stable Disease

24

AWD

180

6

Progressive, irreversible

Regular follow-up

9

F/59

Parotid malignant tumor

23

3

Yes

Contralateral neck node biopsy

 

4

AWD until last follow-up

34

6

Progressive, irreversible

Recommend surgery and postoperative radiation therapy

  1. HB House-Brackmann; SCC squamous cell carcinoma; ACC adenoid cystic carcinoma; NED no evidence of disease; AWD alive with disease
  2. *Diagnosis delay was defined as the time between initial symptoms of facial weakness and identification of malignancy
  3. Extensive tumor with widespread perineural and dural invasion at the time of pathologic diagnosis
  4. No surgery for tumor resection of infratemporal facial nerve schwannoma