HighlightsParathyroid carcinoma is a rare endocrine malignancy.Parathyroid carcinoma is a differential diagnosis of hypercalcaemic disorders.Delayed diagnosis decreases the possibility of cure.Recurrence is very common in parathyroid carcinoma.

Incidental appendiceal neuroendocrine tumors (ANETs) occur in 0.2–0.7% of surgical resections for suspected appendicitis (Moris, Tsilimigras, Vagios, Ntanasis-stathopoulos, Karachaliou, Papalampros, et al. Neuroendocrine neoplasms of the appendix: a review of the literature. Anticancer Res [Internet]. 2018; 38 :601–11.). It’s a rare entity, clinically challenging and has controversy surrounding its management. A 69-year-old male presented to our clinic with acute right lower quadrant abdominal pain with less than 24 hours of evolution. The presumed clinical diagnosis was acute appendicitis. It was performed a laparoscopic appendectomy and the histopathologic result of the specimen showed neuroendocrine tumor of the appendix. ANETs are rare and typically diagnosed as incidental histopathologic finds in appendices specimens. However, they are the most common tumors arising from de appendix, between 30% and 80% of the cases (Pape, Niederle, Costa, Gross, Kelestimur, Kianmanesh, et al. ENETS consensus guidelines for neuroendocrine neoplasms of the appendix (excluding goblet cell carcinomas). Neuroendocrinology . 2016; 103 :144–52). Appendectomy may be sufficing for tumors <2 cm and they are associated with good long-term outcomes.

The most common form of presentation of malignant melanoma is cutaneous. However, it is important to notice that it can occur in any part of the body, mostly from metastatic route. Gastrointestinal forms of symptomatic metastasis are rare, making it sometimes difficult to diagnose. We present a rare case of an 84-year-old female with a small bowel obstruction due to melanoma metastasis. She was treated with an enterectomy, with no surgical or post-operative complications. Although surgery should be reserved from symptomatic patients, some authors refer to it as a palliative treatment with improvement in long-term survival.

HighlightsInflammatory myofibroblastic tumor (IMFT) is an uncommon mesenchymal solid tumor that usually affects children and young adults.We present a case of gastrointestinal involvement by IMFT that presented as an ileocecal intussusception in an adult.The treatment is surgical and prognosis is good if total surgical excision is accomplished.