Table 1.

Summary of previously reported cases of composite pheochromocytoma with immature neuroblastoma component including the two cases reported in this study

Case number	Reference	Age (years)/sex	Associated syndromes	Location	Metastasis	Treatment	N-MYC amplification	Follow-up
1	Wahl 1943 [2]	4/M	None	Mediastinum	Yes	Radiation	N/A	Died (8-month follow-up)
2	Franquemont 1994 [3]	49/M	None	Adrenal-left	No	Surgery	N/A	No evidence of disease after 1 year
3	Franquemont 1994 [3]	38/M	None	Adrenal-right	Yes	Surgery and chemoradiation	N/A	Died 3 months after diagnosis
4	Candanedo-Gonzalez 2001 [4]	56/F	None	Adrenal-right	No	Surgery	N/A	Asymptomatic at 24 months post-op
5	Tatekawa 2006 [5]	5/M	None	Adrenal-left	No	Surgery	N/A	Unknown
6	Comstock 2009 [6]	17/M	NF1	Adrenal-laterality unspecified	No	Unknown	Non-amplified	Alive (follow-up date unknown)
7	Steen 2014 [7]	46/M	None	Adrenal-left	No	Surgery	N/A	Asymptomatic and normotensive at 6 months post-op
8	Current study	57/M	NF1	Adrenal-left	No	Surgery	Non-amplified	Asymptomatic and normotensive (6 months post-op)
9	Current study	5/M	None	Adrenal-left	Yes	Surgery, chemoradiation, SCT	Amplified	Died 2 years after diagnosis

NF 1 neurofibromatosis type 1, SCT stem cell transplant