Primary signet ring cell carcinoma of the colon and rectum.

Colorectal primary signet ring cell carcinoma (SRCC) is a rare entity accounting for nearly 1% of all colorectal carcinomas. It is an independent prognostic factor associated with less favorable outcome. This aggressiveness is mainly due to the intrinsic biology of these tumors.

Complete histologic response to chemotherapy in a patient with a mediastinal yolk sac tumor: a case report.

Background: Malignant mediastinal germ cell tumors are a rare disease and represent only 1% to 4% of all mediastinal tumors. Gonadal germ cell tumors are generally the most common type and constitute 90% of germ cell tumors. The mediastinum is the second most frequently affected area ahead of other extragonadal areas, which include the retroperitoneum, the sacrococcygeal area, and the central nervous system.

[Tripe palms and a hypertrophic osteoarthropathy syndrome revealing a neuroendocrine carcinoma of the lung].

Background: Tripe palms is a rare cutaneous paraneoplastic syndrome, primarily evocative of lung and gastric neoplasia. Association of many paraneoplastic diseases has also been reported.

Patients And Methods: A 49-year-old man with a history of alcoholism and smoking addiction reported haemoptysis and thoracic pains present for one year.