Multiple primary malignant tumors of upper gastrointestinal tract: A novel role of 18F-FDG PET/CT

Table 1 Characteristics of synchronous tumor in 12 patients

Sex/age (yr)	PET/CT findings				Endoscopic results
	T	T	N	M
F/61	EPC (lower)	Cardiac	Gastrohepatic		EPC (lower), cardiac
M/60	Hypopharynx	EPC (mid, lower)	Mediastinal		Hypopharynx
M/62	EPC (upper)	EPC (lower)	Supraclavicular		EPC (upper)
M/59	EPC (lower)	Cardiac	Mediastinal, gastrohepatic		EPC (lower), cardiac
M/61	Hypopharynx	EPC (mid)	Right cervical		Hypopharynx
M/62	EPC (mid)	Cardiac	Gastrohepatic		EPC (mid), cardiac
M/78	EPC (lower)	Pylorus	Mediastinal, gastrohepatic	Lung	EPC (lower), pylorus
M/57	EPC (mid, lower)	Cardiac	Mediastinal, gastrohepatic	Lung	EPC (mid, lower)
M/52	EPC (upper)	EPC (mid, lower)	Mediastinal, supraclavicular		EPC (upper, mid)
M/62	EPC (mid, lower)	Cardiac	Mediastinal, gastrohepatic	Liver	EPC (mid, lower)
M/53	Hypopharynx	EPC (mid, lower)	Cervical, mediastinal, retroperitoneal		Hypopharynx
M/60	EPC (upper)	EPC (mid)	Supraclavicular, mediastinal		EPC (upper, mid)

PET/CT: Positron emission tomography/computed tomography; EPC: Esophageal cancer.

Table 2 Characteristics of metachronous tumor in 3 patients

Sex/age (yr)	PET/CT findings				Endoscopic results
	Primary	Secondary	N	M
M/68	EPC resection 10 yr ago	Hypopharynx	Cervical		Hypopharynx
M/49	GC resection 25 yr ago	EPC (lower), Cardiac	Supraclavicular	Lung	EPC (lower), cardiac
F/63	EPC resection 5 yr ago	Gastric tube cancer	Retroperitoneal		Gastric tube cancer

PET/CT: Positron emission tomography/computed tomography; EPC: Esophageal cancer; GC: Gastric cancer.