From: Bell’s palsy misdiagnosis: characteristics of occult tumors causing facial paralysis
Patient | Imaging study | Time to 1st image | 1st image at other hospital | No of imaging before diagnosis | Initial imaging finding | Time interval to follow up image | Interval progression | Reason for diagnostic delay |
---|---|---|---|---|---|---|---|---|
1 Skin SCC | MR Head | 13 | no | 2 | FN enhancement | 9 | More prominent FN enhancement | Nonspecific FN enhancement |
2 Parotid ACC | MR Head | 5 | yes | 1 | Normal (report only, other hospital) | N/A* | N/A | Normal in initial MR |
3 Skin SCC | MR Head | 14 | yes | 2 | Normal | 6 | Multiple cranial nerve enhancement | Normal in initial MR |
4 Parotid ACC | MR Head | 5 | yes | 2 | FN enhancement | 11 | More prominent FN enhancement | Nonspecific FN enhancement |
5 Skin SCC | MR Head | 3 | yes | 2 | Normal (report only, other hospital) | 24 | Multiple cranial nerve enhancement | Unknown |
6 Skin SCC | MR Head | 6 | yes | 2 | Normal (report only, other hospital) | 7 | abnormal enhancement in FN and parotid gland | Unknown |
7 Facial nerve schwannoma | MR Head | 4 | yes | 2 | Normal (report only, other hospital) | 2 | Facial nerve focal tumor | Unknown |
8 Facial nerve schwannoma | MR Head | 6 | yes | 2 | Normal (report only, other hospital) | 174 | Facial nerve focal tumor | Unknown |
9 Parotid malignancy | MR Head | 5 | yes | 3 | Normal (report only, other hospital) | 12 | Parotid tumor with multiple neck metastasis | Misdiagnosis† |