Ossifying Fibroma of the Orbit

Osificirajući fibrom glave i vrata rijedak je tumor koji najčešće zahvaća gornju i donju čeljust. Javlja se u trećem i četvrtom desetljeću života. Lezija je obično solitarna, dobro ograničena. Postupnim rastom stanjuje okolno zdravo koπtano tkivo. Radiološka slika ovisi o trajanju bolesti. U ranome stadiju prikazuje se kao oštro ograničeno prosvjetljenje s pojedinačnim nakupinama kalcifikata. U daljnjem tijeku, uz oštro ograničenu zonu prosvjetljenja na periferiji, središnje smještene nakupine kalcifikata postaju gušće. Histološku sliku karakterizira fibrozno tkivo isprepleteno koštanim trabekulama lamelarne kosti koje su obrubljene osteoblastima i mjestimice miksomatoznom stromom. Terapija je kirurška i sastoji se u potpunoj resekciji tumora, koja jedino može spriječiti pojavu lokalnoga recidiva. U radu smo prikazali rijedak slučaj osificirajućeg fibroma orbite koji je zahvatio zigomatičnu kost i proširio se preko velikoga krila sfenoida do optičkoga kanala. Specifičnost terapije u naše bolesnice jest u tome što je unatoč doticaja tumora s prednjom lubanjskom bazom nije upotrijebljen neurokirurški pristup.Ossifying fibroma of the head and neck is a rare tumour which most frequently involves the upper and lower jaw. It occurs during the third and fourth decade of life. The lesion is usually solitary and well circumscribed. It grows slowly, thinning the surrounding healthy bone tissue. Radiographic appearance depends on the duration of the disease. In the early stage it presents as a sharply circumscribed zone of translucency with single accumulations of calcification. During the further course, with the sharply circumscribed zone of translucency on the periphery, the centrally located accumulations of calcification become denser. The histological appearance is characterised by fibrous tissue, interwoven with bony trabeculae of lamellar bones, which are bordered with osteoblasts and scattered myxomatous stroma. Therapy is surgical and consists of total resection of the tumour, which is the only way to prevent the occurrence of a local recurrence. In this paper we present a rare case of ossifying fibroma of the orbit which involved the zygomatic bone and spread/extended via the large branch of the sphenoid up to the optic canal. The specificity of the therapy in our female patient was that in spite of contact of the tumour with the frontal base of the skull, a neurosurgical approach was not used

Ossifying Fibroma of the Orbit

Osificirajući fibrom glave i vrata rijedak je tumor koji najčešće zahvaća gornju i donju čeljust. Javlja se u trećem i četvrtom desetljeću života. Lezija je obično solitarna, dobro ograničena. Postupnim rastom stanjuje okolno zdravo koπtano tkivo. Radiološka slika ovisi o trajanju bolesti. U ranome stadiju prikazuje se kao oštro ograničeno prosvjetljenje s pojedinačnim nakupinama kalcifikata. U daljnjem tijeku, uz oštro ograničenu zonu prosvjetljenja na periferiji, središnje smještene nakupine kalcifikata postaju gušće. Histološku sliku karakterizira fibrozno tkivo isprepleteno koštanim trabekulama lamelarne kosti koje su obrubljene osteoblastima i mjestimice miksomatoznom stromom. Terapija je kirurška i sastoji se u potpunoj resekciji tumora, koja jedino može spriječiti pojavu lokalnoga recidiva. U radu smo prikazali rijedak slučaj osificirajućeg fibroma orbite koji je zahvatio zigomatičnu kost i proširio se preko velikoga krila sfenoida do optičkoga kanala. Specifičnost terapije u naše bolesnice jest u tome što je unatoč doticaja tumora s prednjom lubanjskom bazom nije upotrijebljen neurokirurški pristup.Ossifying fibroma of the head and neck is a rare tumour which most frequently involves the upper and lower jaw. It occurs during the third and fourth decade of life. The lesion is usually solitary and well circumscribed. It grows slowly, thinning the surrounding healthy bone tissue. Radiographic appearance depends on the duration of the disease. In the early stage it presents as a sharply circumscribed zone of translucency with single accumulations of calcification. During the further course, with the sharply circumscribed zone of translucency on the periphery, the centrally located accumulations of calcification become denser. The histological appearance is characterised by fibrous tissue, interwoven with bony trabeculae of lamellar bones, which are bordered with osteoblasts and scattered myxomatous stroma. Therapy is surgical and consists of total resection of the tumour, which is the only way to prevent the occurrence of a local recurrence. In this paper we present a rare case of ossifying fibroma of the orbit which involved the zygomatic bone and spread/extended via the large branch of the sphenoid up to the optic canal. The specificity of the therapy in our female patient was that in spite of contact of the tumour with the frontal base of the skull, a neurosurgical approach was not used

Good reasons to implement quality assurance in nationwide breast cancer screening programs in Croatia and Serbia: Results from a pilot study

The purpose of this study is to investigate the need for and the possible achievements of a comprehensive QA programme and to look at effects of simple corrective actions on image quality in Croatia and in Serbia. The paper focuses on activities related to the technical and radiological aspects of QA. The methodology consisted of two phases. The aim of the first phase was the initial assessment of mammography practice in terms of image quality, patient dose and equipment performance in selected number of mammography units in Croatia and Serbia. Subsequently, corrective actions were suggested and implemented. Then the same parameters were re-assessed. Most of the suggested corrective actions were simple, low-cost and possible to implement immediately, as these were related to working habits in mammography units, such as film processing and darkroom conditions. It has been demonstrated how simple quantitative assessment of image quality can be used for optimisation purposes. Analysis of image quality parameters as OD, gradient and contrast demonstrated general similarities between mammography practices in Croatia and Serbia. The applied methodology should be expanded to larger number of hospitals and applied on a regular basis. (C) 2009 Elsevier Ireland Ltd. All rights reserved