We present a very rare case of malignant transformation of a benign mature cystic teratoma. The pathology report revealed malignant transformation of both the epithelial and sarcomatous elements of a benign dermoid cyst. To the best of our knowledge, this appears to be the third case of a malignant fibrous histiocytoma and a squamous cell carcinoma developing from a mature cystic teratoma. Mali...

The term collision tumor refers to the coexistence of two adjacent but histological distinct tumors with no histological admixture at the interface. Collision tumors involving ovaries are extremely rare. A collision tumor composed of a dermoid cyst and fibrothecoma is extremely rare in menopausal women. The mechanism of the development of collision tumor is uncertain. During clinical evaluation...

Objective To describe a case of dermoid cyst arising from the pterygopalatine fossa and review the literature. Methods We report a case of a 23-year-old man who suffered a car accident 2 years before otolaryngologic attendance. He had one episode of generalized tonic-clonic seizure and developed a reduction of visual acuity of the left side after the accident. Neurologic investigation was perfo...

Epidermoid and dermoid cysts are rare in oral cavity. We are presenting here three such cases of sublingual dermoid cyst with submental extension (plunging dermoid) who presented in outpatient department with complaints of a slow growing painless swelling in the oral cavity and difficulty in chewing and swallowing solid foods. On clinical examination cystic swelling was seen in floor of mouth d...

Background Intracranial dermoid cysts are rare tumors of congenital origin. We report a case of a large dermoid tumor arising in the infratemporal fossa (ITF) with erosion into the middle cranial fossa. After reviewing the literature, we believe this represents the first reported dermoid tumor of the ITF with extension into the middle cranial fossa. Results A 21-year-old women presented with a ...

Dermoid cysts are congenital anomalies derived from ectoderm. They are rare in head and neck region and especially in pinna. We presented an 8-year-old girl with a dermoid cyst in the conchal region of auricle which was treated with complete surgical resection.

Nasal dermoid sinus cysts are the most common congenital midline nasal lesions. We describe a novel technique for the excision of a nasal dermoid cyst in a 2-year-old boy using a four hand endoscopic approach via a small scalp incision behind the hairline. The technique, although somewhat challenging, avoids a facial scar.

background: benign ovarian cysts are common among both pre- and postmenstrual women. surgical intervention for excision of an ovarian cyst is mandated when symptomatic, or chance for malignancy is high. the damaging effect of surgical ovarian cystectomy on ovarian reserve is debated in recent studies. objective: in the present study we investigated serum level of anti-mullerian hormone (amh) as...

Background and Importance: Conus medullaris dermoid cysts are benign lesions, usually observed in the lumbosacral region of ​​ the spinal canal. Such lesions are often associated with congenital dermal sinus tracts and spinal dysraphism. Case Presentation: We reported a 37-year-old man with progressive paralysis in left lower limb distal presented to our clinic. The MRI of the lumbar spine, as...

Dermoid cysts are rare congenital intracranial tumors. Among these tumors, extradural localization is extremely rare. We report a patient with an extradural dermoid cyst of the right parasellar region, causing right visual disturbance. Computed tomography revealed a hypodense mass lesion with rimlike calcification at the right parasellar region, accompanying marked erosion of the adjacent skull...