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Pancreatic neuroendocrine tumors (p-NETs) are a rare group of neoplasms but with increasing incidence. The atypical complications that arise in the setting of functional endocrine tumors are underreported and therefore have not received sufficient attention and the necessary mention in the oncology literature. The clinical implications of these complications pose management challenges starting with the difficulty in establishing diagnosis, accurate staging and optimal treatment of the primary process. We present the case of a middle-aged woman diagnosed with adrenocorticotropic hormone-producing carcinoma arising from the pancreas whose case was complicated by excessive uncontrolled hypercortisolism and reactivation of pulmonary opportunistic infections that confounded her management. We believe that this case illustration will be of value to practicing oncologists and other groups of physicians who are called upon to participate in the multidisciplinary treatment of these relatively rare but highly challenging cases.