Middle Ear Osteoma Causing Mixed Hearing Loss: A Case Report.

Osteomas of the middle ear are rare benign tumors. Their consequences and symptoms are due to their specific location, such as the promontory or the epitympanum and their contact with the facial nerve, the semicircular canal, the ossicles, and the oval or round windows. We report a very unusual case of middle ear osteoma (MEO) in a 23-year-old male patient causing a right mixed hearing loss by contacting and overwhelming the incus and stapes. The lesion was also closely attached to the tympanic portion of the fallopian canal. Since the stapes was not clearly visible behind the lesion, careful observation was preferred to surgery owing to the high risk of inner ear damage and facial palsy with removal of the lesion. MEOs are rarely situated at this critical site. Regular clinical and computerized tomography monitoring is warranted to check their growth. This case also supports the etiological theory of chronic middle ear inflammation causing osteomas.

Congenital plate-like osteoma cutis in an infant.

Plate-like osteoma cutis is widely thought to be present at birth, but it has never been illustrated in early infancy until now. We report on an infant that presented with congenital plate-like osteoma cutis, showing the earliest clinical aspect of the lesion and its initial morphologic changes.

Congenital osteoma cutis of the lateral canthus.

Osteoma cutis is a rare condition involving the formation of bone in skin or subcutaneous tissue. This may be a primary event or, more often, secondary to an inflammatory, traumatic, or neoplastic process. There is little evidence in the literature of this condition involving the eye or ocular adnexal structures. The authors report two remarkably similar cases involving children with congenital isolated osteoma cutis involving the left lateral canthus.

Gardner's syndrome: genetic testing and colonoscopy are indicated in adolescents and young adults with cranial osteomas: a case report.

We present a case of a 25-year-old female with diagnosed familial adenomatous polyposis and elevated carcinoembryonic antigen with negative family history. The suspicion of Gardner's syndrome was raised because extirpation of an osteoma of the left temporo-occipital region was made 10 years ago. Restorative procto-colectomy and ileal pouch anal anastomosis was made but histology delineated adenocarcinoma of the rectum (Dukes C stage). We conclude that cranial osteomas often precede gastrointestinal manifestations of familial adenomatous polyposis or Gardner's syndrome and such patients should be evaluated with genetic testing followed by colonoscopy if results are positive to prevent the development of colorectal carcinoma. If the diagnosis is positive all family members should be evaluated for familial adenomatous polyposis.

Congenital platelike osteoma cutis: case report and review of the literature.

An 18-year-old girl had a progressive enlarging plate of subcutaneous bone in the scalp since birth. Histologic examination of the lesion showed typical osteoma cutis. There was no history of any skin disease prior to development of the osteoma. Frequently congenital and usually located on the scalp, platelike osteoma is a rare variant of osteoma cutis.

Congenital ossifying fibroma (osteofibrous dysplasia) of the tibia--a case report.

Ossifying fibromas of the long bones of the leg are benign lesions occurring in the pediatric age group identical in histological appearance to the similarly named tumor of the jaw in adults. Most frequently presentation occurs after minor trauma with symptoms of a swelling of the tibia or fibula which may be painful. Pathological fracture or limp are also occasional presentations. Congenital cases are extremely rare. We describe an otherwise normal male neonate who presented at birth with a bowed right lower leg. The limb was 1 cm shorter than the other side, with tibia vara and a firm mass situated anteriorly. X-ray showed a mixed lytic and sclerotic lesion in the proximal metaphysis of the tibia. Biopsy showed collagenous stroma containing spindle cells and irregular trabeculae of woven bone rimmed by plump osteoblasts. As the appearances were typical of an ossifying fibroma (osteofibrous dysplasia) no surgical treatment was given. The patient was well with no growth of the tumor and with radiological evidence of healing at 1 year follow up. This case is presented to draw attention to the clinicopathological features of this unusual lesion which must be considered in the differential diagnosis of congenital lesions of the tibia.

[Congenital, plaque-like osteoma of the skin in an infant]. / Angeborenes plattenartiges Osteoma cutis bei einem Säugling.

A plaque-like cutaneous osteoma in a male infant is described and compared with 12 remarkably similar cases from the literature. An important differential diagnosis is that of pseudohypoparathyroidism and it has to be excluded by the examination of the calcium and phosphorus metabolism. There are two possible explanations for the etiologie of osteoma cutis, an osseous hamartom, or a metaplasia of mesenchym cells. Because of some important reasons we prefer the hamartom concept.