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Table 1 Lymph node metastasis pattern of cancer of unknown primary and compatibility with sentinel node theory(N = 64)

From: Sentinel node theory helps tracking of primary lesions of cancers of unknown primary

Lymph node distribution

Primary tumor site

N

Compatibility

Cervical

Head and neck

23

 

Nasopharynx

5

Yes

Oropharynx

5

Yes

Parotid

4

Yes

Sinus piriformis

3

Yes

Root of tongue

3

Yes

submandibular

2

Yes

gland

1

Yes

larynx

1

Yes

Esophagus

(cervical segment)

1

Yes

Cervical+supraclavicular

Cervical cancer of the uterus

1

No

Axillary

Breast

19

Yes

Axillary+supraclavicular

Breast

1

Yes

Axillary+internal mammary

Breast

1

Yes

Axillary+deep surface of pectoralis minor muscle

Breast

1

Yes

Lung hilar±mediastinal

Lung

4

Yes

Lung hilar±mediastinal +supraclavicular

Lung

2

Yes

Lung hilar±mediastinal+cervical

Lung/Prostate

2/1

Yes/No

Lung hilar±mediastinal+inguinal

Lung

1

Yes

Mediastinal+supraclavicular+lateral thoracic

Kidney

1

No

Retroperitoneal+celiac

Pancreas

2

Yes

Renal hilar+retroperitoneal

Kidney

1

Yes

Peri-intestinal

Colon

1

Yes

Peri-iliac vessels+inguinal

Anal canal

1

Yes

Peri-iliac vessels+inguinal +retroperitoneal

Bladder

1

Yes