Extension of an infection from the periorbital structures. This is the most common route. Infections which may breach the orbital septum and extend in this way include the paranasal sinuses, especially ethmoid sinusitis, the face, the globe, the lacrimal sac and dental infection via intermediary maxillary sinusitis. Extension of preseptal cellulitis, particularly in young children in whom the o...

Rhino-orbital-cerebral mucormycosis is an invasive disease caused by fungi. Diabetes mellitus and solid organ transplantation are known risk factors, while it increasingly recognized in patients with COVID-19 although the exact causal relationship unknown. Early diagnosis treatment liposomal amphotericin B surgical debridement carries a better outcome these patients. We present case of extensiv...

Rosai-Dorfman disease is a rare histiocytic proliferative disorder of unknown etiology typically characterized by cervical lymphadenopathy. Extranodal involvement often manifests in the head and neck region. We present a 10-year-old male who presented to our hospital with left epiphora from an aggressive paranasal mass invading the left orbit with osseous destruction. The mass was surgically bi...

Extension of an infection from the periorbital structures. This is the most common route. Infections which may breach the orbital septum and extend in this way include the paranasal sinuses, especially ethmoid sinusitis, the face, the globe, the lacrimal sac and dental infection via intermediary maxillary sinusitis. Extension of preseptal cellulitis, particularly in young children in whom the o...

A 51-year-old man complained of left facial swelling and recurrent nasal bleeding. A giant solid tumor in the left maxillary sinus was detected on head CT and MRI, and this tumor was destroying the maxilla and extending into the orbit, pterygoid muscle and posterior paranasal sinuses. The resected specimen consisted of spindle cells containing necrotic material. Histological examination reveale...

Extension of an infection from the periorbital structures. This is the most common route. Infections which may breach the orbital septum and extend in this way include the paranasal sinuses, especially ethmoid sinusitis, the face, the globe, the lacrimal sac and dental infection via intermediary maxillary sinusitis. Extension of preseptal cellulitis, particularly in young children in whom the o...

PURPOSE To describe the CT findings characterizing dehiscence of the lamina papyracea. METHODS Axial and coronal CT scanning of the paranasal sinuses was performed on 783 patients. RESULTS Dehiscence of the lamina papyracea was noted incidentally in six patients. In all cases dehiscence was characterized by protrusion of orbital fat through a gap in the anterior ethmoid. The posterior limit...

Rhabdomyosarcoma (RMS), a tumor of skeletal muscle origin, is the most common soft tissue sarcoma encountered in childhood and adolescence. The common sites of occurrence are the head and neck region, genitourinary tract, retroperitonium, and, to a lesser extent, the extremities. In the head and neck region, the most commonly affected sites are the orbit, paranasal sinuses, soft tissues of the ...

Sinus histiocytosis with massive lymphadenopathy, also known as Rosai-Dorfman disease (RDD), is an uncommon benign histioproliferative disorder with systemic symptoms and lymphadenopathy. Mostly affecting lymph nodes, RDD typically presents as substantial painless bilateral cervical lymphadenopathy associated with fever, leukocytosis, anemia, polyclonal hypergammaglobulinemia, and increased ery...

Extension of an infection from the periorbital structures. This is the most common route. Infections which may breach the orbital septum and extend in this way include the paranasal sinuses, especially ethmoid sinusitis, the face, the globe, the lacrimal sac and dental infection via intermediary maxillary sinusitis. Extension of preseptal cellulitis, particularly in young children in whom the o...