clavicular bone tumors occur in less than 0.5 percent of bone tumors. primary chondrosarcoma is very rare even among clavicle tumors. the main symptom is a touchable mass in 69 % of patients. dedicated centers using fna and cytology can reach a correct diagnosis in 94% of cases. treatment planning is done using simple x-ray, ct-scan, shoulder mri, chest ct-scan, and whole body technetium scan. ...

Spontaneous perforation of the sigmoid colon or rectom is defined as a sudden perforation of the colon in the absence of diseases such as tumors, diverticulosis or external injury. It is a very rare finding, and if neglected, results in severe peritonitis and high mortality. The causes of this rare condition are numerous, and in this case it might be due to the chronic constipation induced by a...

lipomas are rare gastric tumors that comprise less than 1% of gastric tumors. these tumors are usually without clinical manifestations, but sometimes they may present with severe symptoms like bleeding,intussusception, or abdominal pain. in endoscopic assessment, they manifest with subm ucosal masses with intact epithelium. endosonography and ct scan can help in diagnosis. surgical resection of...

Introduction: Metastatic lesions of the oral cavity are extremely rare, accounting for approximately 1% of all malignant oral tumors. The most common primary sources of metastatic tumors in the oral region are, from the most to the least common, the breast, lung, kidney, bone, and colon. Renal cell carcinoma accounts for nearly 3% of all adult malignancies. It usually metastasizes to the lungs,...