Neuroendocrine Neoplasms of the Gallbladder: A Clinicopathological Analysis of 13 Patients and a Review of the Literature

Table 2

Pathology of 13 patients with GB-NENs.

Patient	Site	Morphology	Tumor size	Mitotic index (/10 HPFs)	Neuroendocrine tumor grade	Neuroendocrine neoplasm histologic subtype	Adenocarcinoma component
1	Body	Infiltrative	2	30	MiNENs-NEC	Large cell type	Moderately differentiated
2	Fundus	Infiltrative	3.5	20	MiNENs-NEC	Large cell type	Moderately differentiated
3	Neck	Infiltrative	2.5	20	MiNENs-NEC	Small cell type	Well differentiated
4	Neck	Protruding	4	50	MiNENs-NEC	Large cell type	Well differentiated
5	Body	Infiltrative	5.5	40	MiNENs-NEC	Small cell type	Well differentiated
6	Fundus	Protruding	5	20	MiNENs-NEC	Large cell type	Moderately differentiated
7	Body	Infiltrative	2	30	MiNENs-NEC	Small cell type	Well differentiated
8	Fundus	Infiltrative	7	10	MiNENs-NET G2	Neuroendocrine tumor	Well differentiated
9	Neck	Protruding	3	40	Amphicrine carcinoma	Amphicrine carcinoma
10	Fundus	Protruding	2	30	NEC	Small cell type	Absent
11	Fundus	Protruding	4	40	NEC	Large cell type	Absent
12	Fundus	Protruding	0.6	1	NET-G1	Neuroendocrine tumor	Absent
13	Fundus	Protruding	0.6	1	NET-G1	Neuroendocrine tumor	Absent