Epidermoid cyst of spleen mimicking splenic lymphangioma.

Primary splenic cyst is a relatively rare entity; they comprise only about 10% of benign non-parasitic cysts. Most of these are asymptomatic and are observed incidentally during abdominal ultrasonography. The number of diagnosed splenic cyst cases seems to have risen because of the increasing use of abdominal imaging techniques. However, definite diagnosis is possible only after splenectomy when epithelial lining is confirmed histologically. We report a case of a 14-year-old child who presented with fullness of abdomen and pain in the left hypochondrium since last few months. First impression made was in favor of a splenic lymphangioma of size 8 × 8 cm which was based on a Computerized tomography scan and the sonographic findings. Splenectomy was performed and was sent for histopathological examination which in combination with immunohistochemistry revealed findings suggestive of primary epithelial cyst. A large cystic mass with a relatively thin wall localized in the spleen is likely to be a primary or secondary cyst. The diagnosis of false cyst should be favored if there is a clear history of trauma, if the patient is older than fourth decade, if there is a hematoma elsewhere in spleen, or if cyst wall is calcified. This rare entity should be considered in the differential diagnosis in a patient presenting with left hypochondrial pain.

Primary Non-Hodgkin Lymphoma of Palatal Gingiva.

INTRODUCTION: Non-Hodgkin lymphomas (NHLs) are a heterogeneous group of lymphoproliferative malignancies that can disseminate to organs and tissues that do not ordinarily contain lymphoid cells (extranodal sites). Primary extranodal NHL of the oral cavity is rare, and gingiva is one of the rarest intraoral sites involved. The majority of oral NHLs reported are of diffuse large B-cell type. Such lymphomas are more prevalent in immunocompromised patients. Because of their malignant nature, early recognition, diagnosis, and treatment are essential for a patient's survival. To the best of our knowledge, this report presents the first case of diffuse mixed small and large B-cell lymphoma involving the gingiva in a non-immunocompromised patient. CASE PRESENTATION: A female patient presented with a growth located on the palatal aspect of the right maxillary molar region involving marginal and interdental gingiva. Routine laboratory tests and clinical examination were within normal limits. An incisional biopsy of the gingival tissue was evaluated using histologic techniques and immunohistochemistry. A diagnosis of extranodal diffuse mixed small and large B-cell lymphoma was established. The patient underwent a complete workup to rule out other systemic lesions, thereby supporting the primary nature of the lesion. CONCLUSION: Gingival overgrowth may rarely be the first manifestation of extranodal NHL. Only histopathological examination of the specimen with immunohistochemistry can ascertain a confirmed diagnosis of NHL. The present case report stresses the importance of routine biopsy examination for growth lesions of long duration when an infectious etiology has been ruled out, even if the lesions appear benign.