1. Ectopic ACTH Production Caused by Metastatic Parotid Gland Acinic Cell Carcinoma
- Author
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Jacob Burch, Lawrenshey Charles, Osama Mosalem, and James Choi
- Subjects
medicine.medical_specialty ,AcCC, acinic cell carcinoma ,030209 endocrinology & metabolism ,Case Report ,Adrenocorticotropic hormone ,Gastroenterology ,Diseases of the endocrine glands. Clinical endocrinology ,PET, positron emission tomography ,Acinic cell carcinoma ,Surgical pathology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Parotid Gland Acinic Cell Carcinoma ,Internal medicine ,medicine ,acinic cell carcinoma ,CMP, comprehensive metabolic panel ,ectopic ACTH ,Aldosterone ,business.industry ,FNA, fine-needle aspiration ,General Medicine ,Cushing's disease ,RC648-665 ,medicine.disease ,Primary tumor ,Hypokalemia ,CT, computed tomography ,chemistry ,030220 oncology & carcinogenesis ,paraneoplastic ,ACTH, adrenocorticotropic hormone ,medicine.symptom ,business - Abstract
Objective: To present a case of adrenocorticotropic hormone (ACTH) hypersecretion caused by a metastatic acinic cell carcinoma (AcCC) of the parotid. Only 6 cases have been reported prior to October 2019. We believe that this condition is under-reported and hope that improved recognition will improve its reporting. Methods: Diagnosis in this case was done using surgical pathology of the primary tumor, involving lymph nodes, and a metastatic lesion. Following an initial misdiagnosis, a final diagnosis of AcCC was made using immunohistochemical staining. ACTH hypersecretion was diagnosed by testing for random ACTH, cortisol, and 24-hour urine aldosterone and cortisol levels. Results: A 57-year-old man presented with hypokalemia, lower-extremity edema, and left-side rib pain 7 months following excision of a 4-cm left-parotid tumor. Immunostaining positive for DOG-1, CK7, pan-cytokeratin (including CAM5.2), and SOX10 led to the diagnosis of AcCC. ACTH hypersecretion was diagnosed based on a random ACTH level of 307 pg/mL (normal morning value, 7.2-63 pg/mL), a cortisol level of 33 μg/dL (normal morning value, 4.3-19.8 μg/dL; normal PM value, 3.1-15.0 μg/dL), a 24-hour urine aldosterone level of
- Published
- 2021