22 February 2025
: Case report 
Rare Presentation of Middle Ear Neuroendocrine Tumor: A Case Report
Unknown etiology, Challenging differential diagnosis, Unusual or unexpected effect of treatment, Patient complains / malpractice, Unexpected drug reaction, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)
Nan Zeng ABCD 1, Qiong Yang ABCD 1, Jing Hu ABG 1, Shang Yan EF 2*DOI: 10.12659/AJCR.945602
Am J Case Rep 2025; 26:e945602
Figure 4. (A) HE Staining: Fibrous connective tissue contains irregularly arranged cell nests, forming glandular or solid structures. The cell nuclei are hyperchromatic with fine chromatin. Mitotic figures are rare. No necrosis is observed. (B) Immunohistochemical examination: synaptophysin shows diffuse positive staining. (C) Immunohistochemical txamination: Ki67 shows approximately 2% positivity.