20 December 2025
: Case report 
Diagnostic Challenges of Abdominal Tumors Without Typical Imaging Features: From Misdiagnosis of Pancreatic Cystadenoma to Adrenal Pheochromocytoma and the Intraoperative Response
Unusual clinical course, Challenging differential diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents
Haoyang Huang
BCDEF 1, Dingwei Xu BCD 1, Zhangbin Chen CD 1, Jie Huang AG 1*
DOI: 10.12659/AJCR.950574
Am J Case Rep 2025; 26:e950574
Figure 3 Pathology results showing adrenal pheochromocytoma. (A, B) Staining with hematoxylin-eosin (HE); Observation perspective: Two-dimensional planar observation; Internal scale: 1 unit=100–200 μm (low-power). (C) Staining with hematoxylin-eosin (HE); Observation perspective: Two-dimensional planar observation; Internal scale: 1 unit=25–50 μm (high-power). (D) Immunohistochemical staining; Observation perspective: Two-dimensional planar observation; Internal scale: 1 unit=25–50 μm (high-power); Immunohistochemical Results: S100(+), PMS-2 (machine-stained) (+), MLH1 (machine-stained) (focal +), MSH2 (machine-stained) (focal +), MSH6 (machine-stained) (+), β-catenin (membranous +), inhibin-α(−), Ki-67(1%), ATRX(+), SF-1 (+), P27(+), CD56(+), CgA(+), Syn(+), CKL(−), SDHB(+).