Predictive value of multi-detector computed tomography for accurate diagnosis of serous cystadenoma: Radiologic-pathologic correlation

Table 1 MDCT findings observed in the various pancreatic cystic lesions

	SCA (n = 28)	IPMN (n = 42)	MCN (n = 37)	Unclassified Cysts (n = 45)	Endocrine tumors (n = 6)	Adenocarcinoma (n = 4)	Lymphan-gioma (n = 1)	SPE (n = 1)
Size (cm) mean (range)	3.9 (0.8-9.2)	2.7 (0.9-5.2)	4.3 (2.2-11)	2.4 (0.5-7.4)	4.6 (1.6-8.9)	3 (1.4-5.2)	2.3	2.3
Location
Head	11	26	12	20	2	2	1
Body	11	7	7	8	0	1		1
Tail	3	7	17	12	4	1
Body/Tail	3	3	1	5	0	0
Lobulations (n = 35/164)	25	3	1	5	1	0	0	0
Microcystic (n = 25/164)	22	1	2	0	0	0	0	0
Central Scar (n = 9/164)	92	0	0	0	0	0	0	0
L + M1 (n = 19/164)	19	0	0	0	0	0	0	0
Septa	27	32	25	28	2	2	0	0
Wall
Thin	28	40	30	31	0	2	1	1
Thick	0	2	7	14	6	2	0	0
Calcifications
Wall	0	4	1	5	0	0	0	0
Septal	0	2	0	0	0	0	0	0
Parenchymal	1	0	0	0	0	0	0	0
Mural nodules	0	3	6	1	3	4	0	1
Dilatation of PD	3	14	11	2	0	3	0	0
Vascular involvement	0	0	1	2	0	2	0	0
Lymphadenopathy	0	3	6	3	0	2	0	0

MDCT: Multi-detector computed tomography; SCA: Serous cystadenoma; IPMN: Intraductal papillary mucinous neoplasm; MCN: Mucinous cystic neoplasm.

¹Combined presence of Lobulations and microcystic appearance;

²3/9 showed calcifications within the central scar.

Table 2 Comparison of MDCT findings with pathological findings for SCA (n = 28)

	MDCT features	Pathology findings
Morphology
Microcystic	22	21
Macrocystic/Oligocystic	6	6
Unilocular	-	1
Shape
Lobulated	25	25
Smooth	3	3
Central scar	9	10
Wall
Thin	28	28
Thick	0	0
Mural nodules	0	0
Septa	27	27

Table 3 Sensitivity, specificity, predictive values and accuracy of morphological features in the diagnosis of SCA in comparison to other cystic lesions

	Lobulations (n = 35/164, %)	Microcystic (n = 25/164, %)	Central scar (n = 9/164, %)	L + M1 (n = 19/164, %)
Sensitivity	89.30	78.50	32.40	67.85
Specificity	92.64	97.79	100.00	100.00
Positive predictive value	71.42	88.00	100.00	100.00
Negative Predictive value	97.67	95.70	87.74	93.80
Accuracy	92.00	94.50	88.40	94.50

¹L + M: Lobulations and microcystic pattern.