Calcitonin-producing Duodenal Neuroendocrine Tumor: A Case Report and Literature Review.

Introduction: Neuroendocrine tumors [NETs] exhibit a wide range of clinical presentations, including the production of various hormones. Calcitonin, a sensitive marker for medullary thyroid cancer [MTC], is nonspecific and may be elevated in extra-thyroidal NETs.

Case Report: We present the case of a 64-year-old female patient who underwent total thyroidectomy due to a nodule in the isthmus, with a fine-needle aspiration biopsy indicating follicular neoplasia.

[Bilateral adrenal incidentaloma in a patient with acute appendicitis].

Background: Adrenal incidentalomas are tumors that are usually detected in imaging studies indicated without suspicion of adrenal disease. Pheochromocytoma is a neuroendocrine tumor that can occur sporadically or associated with genetic syndromes, having been described in 0.1-5% of patients with type 1 neurofibromatosis, which is a progressive multisystemic disease of autosomal dominant inheritance that affects 1 / 2600-3000 individuals .

[Adipsic diabetes insipidus patient in postoperative pituitary macroadenoma].

Background: Adipsic diabetes insipidus is a rare condition secondary to injury to osmoreceptors in the anterior hypothalamic area. Only two cases have been published secondary to pituitary tumor surgery.

Case Report: A 43-year-old man, postoperative of a non-functioning pituitary macroadenoma invading the third ventricle and compressing the hypothalamus.