BACKGROUND Biliary cystadenoma is a rare benign neoplasm, which is often misdiagnosed for a hepatic abscess or a hydatid cyst that tends to recur and is at risk for progression to malignant neoplasm. CASE PRESENTATION This case describes a 30-year-old woman admitted to our institution in an emergency setting. The patient was originally misdiagnosed as affected by a hepatic hydatid cyst at ano...

The keratocystic odontogenic tumor (KCOT), earlier considered as the odontogenic keratocyst (OKC), is now classified as a benign neoplasm owing to its aggressive nature which includes a high recurrence rate. This case report describes a symptomatic large intraosseous odontogenic cystic neoplasm in the left mandible presenting radiographically as a large multilocular radiolucency and associated ...

there are unfortunately a relatively large number of cases of esophageal cancer in iran as well as other countries, and one of the most difficult problems facing surgeons is the reconstruction of the esophagus and restoration of its function after excision of the tumor. from 1978 to 1987,20 patients (16 male, 4 female) ranging in age from 22 to 68 years were surgically treated for squamous cell...

central cementifying fibroma is a bony tumor, which is believed to be derived from the cells of the periodontal ligament. central cemento‑ossifying fibroma behaves like, a benign bone neoplasm. this bone tumor consists of highly cellular, fibrous tissue that contains varying amounts of calcified tissue resembling bone, cementum, or both. central cemento‑ossifying fibromas of the mandible are co...

primary oral melanoma is a rare neoplasm of melanocytic origin, accounting for 0.5% of all oral malignancies. the “chameleonic” presentation of a mainly asymptomatic condition, rarity of this lesion, poor prognosis, and the necessity of a highly specialized treatment are factors that should be seriously considered by the involved health provider. here is a case report presenting a malignant mel...

Desmoplastic fibroma (DF) is a benign, rare fibroblastic intraosseous neoplasm histologically resembling a desmoid soft tissue tumor. Although classified as benign, DF frequently exhibits an aggressive behavior, has a moderate-to-high recurrence rate, and often causes pathological fractures and extensive bone destruction. This case report presents an incidentally detected DF of the tibia, which...

We show that any finite-term recurrence relation for planar orthogonal polynomials in a domain imply that the domain must be an ellipse. Our proof relies on Schwarz function techniques and on elementary properties of functions in Sobolev spaces.