1/9. Maxillary myxoma: a rare midfacial mass in a child.The case of a maxillary myxoma in a 13-month-old child is presented. This case highlights the difficulties associated with managing such cases. The tumour was found at operation to be unencapsulated and infiltrative. This was contrary to the preoperative CT scan findings and necessitated a change from a sublabial to a lateral rhinotomy approach. This case illustrates a potential pitfall of CT scanning in such cases: it is likely that a MRI scan would have demonstrated the invasive nature of this tumour. To the authors' knowledge this is the second youngest reported case of maxillary myxoma in the literature.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
2/9. Signet-ring cell adenocarcinoma metastatic to the maxillary sinus.Signet-ring cell variant is a rare type of adenocarcinoma that has been reported in the paranasal sinuses and in other areas, most commonly the gastrointestinal tract. We describe a patient with signet-ring cell adenocarcinoma of the maxillary sinus who had dental and facial pain. Further evaluation revealed that the lesion was metastatic from an esophageal primary lesion. The unusual nature of this cell type and the importance of careful evaluation to exclude the possibility of these lesions representing metastatic lesions is discussed.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
3/9. Sinonasal myxoma: a pediatric case.The authors report a case of a rare facial myxoma arising from the maxillary sinus in a 20-month-old child. The diagnosis was confirmed by a biopsy, and the patient underwent a partial maxillectomy to achieve a total resection of the mass due to the locally aggressive nature of the lesion. Myxomas should be differentiated from malignant sarcomas, in particular embryonal rhabdomyosarcoma, which can arise from the same location and require multimodality therapy consisting of surgery, irradiation, and chemotherapy.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
4/9. Inflammatory pseudotumour (plasma cell granuloma) arising in the maxillary sinus.CONCLUSIONS: Inflammatory pseudotumours in the maxillary sinus may present as malignant tumours and manifest locally aggressive features characteristic of such tumours. Despite their locally destructive features, they pursue a benign course after local excision. OBJECTIVE: Inflammatory pseudotumour (plasma cell granuloma) is an uncommon non-neoplastic lesion comprising a proliferation of spindle myofibroblasts and chronic inflammatory cells. Despite its benign histopathological nature, it may exhibit aggressive behaviour that is yet to be characterized in the head and neck area. MATERIAL AND methods: We present the cases of two adult patients with inflammatory pseudotumour arising from the maxillary sinus. immunohistochemistry and polymerase chain reaction for immunoglobulin from tissue sections were performed to confirm the polyclonality of the infiltrating plasma cells. RESULTS: CT and MRI disclosed expansive soft masses eroding surrounding soft and bony tissues. Histopathologically, the lesions were unencapsulated and composed of numerous plasma cells, histiocytes and spindle cells with minimal nuclear pleomorphism.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
5/9. Intravascular papillary endothelial hyperplasia in the maxillary sinus. A benign lesion that may be mistaken for angiosarcoma.Intravascular papillary endothelial hyperplasia is a vascular benign lesion bearing some similarities to malignant angiosarcoma. To the best of our knowledge, it has never been described within the paranasal sinuses. A case of such a lesion within the maxillary sinus appearing in a 17-year-old boy who presented with unilateral facial pains and proptosis is reported. The lesion, despite its benign nature, extended to the ethmoidal cells and nasal cavity and pressed the floor of the orbit. Clinically and histopathologically it may be mistaken for an angiosarcoma. An awareness of this similarity and the features in which it differs from angiosarcoma will prevent incorrect diagnosis and inappropriate treatment.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
6/9. Cylindrical cell papilloma.A case of cylindrical cell papilloma (CCP) arising in the maxillary sinus is described. light and electron microscopic findings revealed the characteristic oncocytic nature of the neoplasm. A review of the literature confirms the rarity of CCP and its behavioral similarities to the more common inverted papilloma. The relatively high rate of recurrence, coupled with the increased risk of associated malignancy, necessitates the recognition and appropriate treatment of CCP.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
7/9. myxoma of the maxillary antrum in children.Myxomas of the maxillary antrum are rare tumours, particularly in childhood. Although circumscribed, they are often more extensive than apparent and so tend to recur despite their benign nature. Myxomas are gelatinous and are composed of stellate and spindle cells embedded in an abundant alcian blue-positive, mucoid stroma in which blood vessels are often scattered throughout the tumour. Three patients with maxillary myxomas, all presenting in infancy or early childhood, are described.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
8/9. 67Ga citrate and 99mTc(v)-DMSA scintigraphy in a case of maxillary sinus liposarcoma.Scintigraphic images with 67Ga citrate and 99mTc(v)-dimercaptosuccinic acid and MR image of a 16-year-old male with maxillary sinus liposarcoma (predominantly myxoid type) are reported. The MR image clearly indicated the exact location, size and anatomical relationship of the tumor. Scintigraphic evaluation was useful in suggesting the malignant nature of the tumor and showed no distant metastasis. Both examinations were effective in treating this case.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
9/9. Malignant schwannoma arising in a paranasal sinus.A case of malignant schwannoma arising in a paranasal sinus is reported. In this case, histological hallmarks were lost because of the poorly differentiated nature of the tumour. Immunohistological techniques were applied to the diagnosis, confirming the neural origin of this tumour. Malignant schwannoma is a relatively rare disease in the nasal cavity and paranasal sinuses. For the treatment of this tumour, wide resection is recommended. In this patient, radical resection of the maxilla with orbital and ethmoid exenteration was performed. The patient recovered uneventfully with no evidence of disease three years after surgery.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |