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Objective: Rare disease Background: Schwannomas are tumors that arise from Schwann cells that surround and support nerve cells. Most common sites for presentations are head, neck, and extremities. Schwannomas of gastrointestinal tract are rare, slowgrowing tumors, usually benign, arising from gastrointestinal tract's neural plexus. They are histologically distinguishable from conventional schwannomas that arise in soft tissue or the central nervous system. Preoperative diagnosis of gastrointestinal schwannoma is challenging, requiring immunohistological confirmation of the nature of the tumor. Here, we report a case of 57-year-old woman with an incidental finding of an asymptomatic submucosal jejunal schwannoma. Case Report: A 57-year-old woman with a medical history of hematological disorder underwent a contrast abdominal computed tomography as part of medical follow-up. The imaging revealed the presence of a jejunal mass. The patient underwent laparoscopic surgical resection of the lesion, followed by side-to-side jejuno-jejunal anastomosis with 4-cm clear surgical margins. The final pathologic study revealed the presence of jejunal schwannoma, as tested positive for S-100 protein. The patient was discharged home on the fourth postoperative day, having an uneventful recovery. Conclusions: Jejunal schwannoma are usually benign and asymptomatic, and they are often discovered incidentally during diagnostic tests for other conditions; therefore, it should be included in the differential diagnosis of gastrointestinal tumors. Surgical treatment appears to be necessary to achieve a definitive diagnosis through a biopsy of the tumor tissue. Benign jejunal schwannomas have a good prognosis. [ABSTRACT FROM AUTHOR]

Breast sarcoidosis is extremely rare, substantially less frequent than other extrapulmonary manifestations of sarcoidosis. It can mimic a benign or malignant tumor of the breast. We describe the case of a patient with a history of pulmonary sarcoidosis referred to our hospital for a screening mammography. Mammographic findings raised the suspicion for a breast mass. An additional breast ultrasound and fine -needle aspiration biopsy were performed. Finally, patient underwent a excisional biopsy of the left breast and the histopathological report revealed sarcoidosis. [ABSTRACT FROM AUTHOR]

BACKGROUND Internal hernias, a rare type of herniation, occur through deficits of peritoneum or mesentery/mesocolon. Herniation of the small intestine into the mesosigmoid fossa is an extraordinary situation. A possible diagnostic delay may lead to intestinal ischemia, perforation, or even necrosis. CASE REPORT A 47-year-old woman was admitted in our Emergency Department with a 24-hour colic pain that started at the epigastrium and then moved to the left pelvic region. Small-bowel obstruction due to internal herniation was diagnosed based on clinical, radiological, and laboratory examination results. We encountered a loop of jejunum that was herniated into the mesosigmoid fossa, making this a unique case, as in most such cases the internal herniated loops are loops of ileum. CONCLUSIONS The key role of computed tomography (CT) is highlighted and the characteristic sign of "C-shaped cluster" is mentioned in the literature for intersigmoid hernia. Although internal mesosigmoid hernia is rare, it should be always kept in mind when the patient's digestive tract is affected. Our main purpose here is to highlight this rare entity for our fellow surgeons.