Table 1 Summary of the clinicopathological characteristics

All cases

21

Age (years)

 Median (range)

71 (36–91)

Female/male

14/7

Histologic characteristics

 Squamous cell carcinoma

8

 Poorly differentiated carcinoma

6

 Adenocarcinoma

5

 Neuroendocrine carcinoma

2

Anatomical location

 Bladder

1

 Bone

2

 Brain

1

 Liver

1

 Lymph node^a

8

 Maxillary sinus

1

 Omentum

1

 Parotid

2

 Pleura

1

 Skin

1

 Submandibular gland

1

 Thyroid

1