[Skin metastasis from invasive bladder tumour].

Metastatic spread of advanced transitional cell bladder carcinoma rarely involves the skin. However, the presence of a skin metastasis indicates at least microscopic dissemination of cancer cells to the liver or lung, corresponding to a poor prognosis. The authors report a new case of single skin metastasis during the course of a poorly differentiated stage pT3a N0 M0 transitional cell bladder carcinoma.

[Benign schwannoma, a rare retroperitoneal tumour].

Primary retroperitoneal tumours are rare in adults. Among retroperitoneal tumours derived from nervous tissue, schwannoma is defined as a tumour arising from neurilemma or Schwann nerve sheath cells. It is a very rare tumour, especially in the retroperitoneal site (0.

[Retrovesical hydatid cyst: diagnosis and treatment in 8 cases].

Introduction: Hydatid cyst represents a real public health problem in Tunisia. Retrovesical hydatid cyst is rare (6% to 7%). It is considered to be an "aberrant" or "ectopic" site defined by the development of the parasite in the subvesical and retrovesical fat.

[Urachal cyst in the adult. A case report and review of the literature].

Simple urachal cyst is a rare pathology in the adults. The diagnosis is rarely established clinically, it is based on ultra sonography and confirmed by anatomo-pathology. The authors report one case of urachal cyst in a 42-year-old patient who present bladder irritation symptom.