RESUMEN
Malignant melanoma is a neoplasm of melanin-producing cells predominantly of cutaneous origin, which uncommonly develops within gut mucosa. We present the case of a 58-year-old woman with complaints of abdominal pain, loss of appetite and weight.Esophagogastroduodenoscopy revealed a gastric mass and systemic imaging demonstrated widespread nodal and bilateral adrenal gland involvement. Histopathology of the gastric mass confirmed primary malignant mucosal melanoma of the stomach. The patient received three cycles of Nivolumab but did not respond, and thus, was then offered best supportive care. Although infrequent, mucosal melanoma can arise from the gastrointestinal tract, and in contrast to the cutaneous form, advanced disease usually has a dismal prognosis and responds poorly to immune checkpoint inhibitors. Primary gastric melanoma is an aggressive disease that is diagnosed by exclusion after the differential diagnosis of metastasis from a cutaneous or unknown primary site has been conducted. If available, patients with treatment-naïve mucosal melanoma should be considered for enrollment in clinical trials.
RESUMEN
The importance and frequency of invasive fungal infections in different organs, including the gastrointestinal tract, has increased due to excessive use of aggressive immunosuppressive and immunomodulatory drugs in malignant diseases and organ transplantations as well as increased infections with the human immunodeficiency virus [HIV]. Fungal infections in the small intestine or colon are usually part of a disseminated disease process and reach these organs through the bloodstream. Two of the patients were infants 10 and 15 days of age, while one was 23 years old. Patients presented with abdominal pain, intestinal obstruction, and rectal bleeding. Hirchsprung disease was suspected in the two infants. In the adult patient, the diagnosis was unclear. Mucormycosis was diagnosed in two out of three cases. It is imperative for clinicians to consider invasive mycosis in the differential diagnosis in patients of all ages with treatment-resistant severe abdominal pain, diarrhea and fever