Acinic cell carcinoma (ACC) is a rare, low-grade malignancy of the salivary glands. Most cases occur in the major salivary glands, especially the parotid gland, with only a few cases involving the minor salivary gland previously described. A 67-year-old male patient was admitted complaining of an obstructive feeling in the throat. On examination, a lobulated mass in the tonsillar surface was noticed. Tonsillectomy was performed under general anesthesia. Histopathological examination of the mass revealed sheets of large, polygonal acinar cells with granular, slightly basophilic cytoplasm, which led to the diagnosis of ACC. Here, we present a case of low-grade ACC of the palatine tonsil, which we believe to be the first reported case of ACC in this location.
Acinar Cells ; Aged ; Anesthesia, General ; Basophils ; Carcinoma, Acinar Cell ; Cytoplasm ; Humans ; Male ; Palatine Tonsil ; Parotid Gland ; Pharynx ; Salivary Glands ; Salivary Glands, Minor ; Secretory Vesicles ; Tonsillectomy

No abstract available.
Adult ; Antigens, CD31/metabolism ; Antigens, CD34/metabolism ; Female ; Hemangioendothelioma, Epithelioid/metabolism/*pathology/radiography ; Humans ; Immunohistochemistry ; Liver Neoplasms/metabolism/*pathology/radiography ; Magnetic Resonance Imaging ; Positron-Emission Tomography ; Tomography, X-Ray Computed ; von Willebrand Factor/metabolism

No abstract available.
Angioedema*

Pilocytic astrocytoma (PA) is a World Health Organization (WHO) grade I tumor typically affecting children and young adults. In general, surgical resection for PA is thought to be curative, and tumor recurrence or malignant transformation is relatively rare. Herein, we report an extremely rare case of a malignant transformation of PA. Five years prior, the patient underwent subtotal resection for PA in the left suprasellar area and left side brain parenchyma of the third ventricle, followed by gamma knife radiosurgery for remnants of the tumor. Four years after surgery, recurrent PA developed, and surgery was performed through an anterior interhemispheric transcallosal approach. One year after surgery, a rapidly growing tumor in the left basal ganglia and hypothalamus was discovered, and subtotal removal was performed. The histological diagnosis was glioblastoma. To the best of our knowledge, malignant transformation of PA has not been reported in Korea. Through review of the literature, we found malignant transformation to be limited solely to patients treated with radiotherapy, which is an observation that should be validated in future studies.
Astrocytoma ; Basal Ganglia ; Brain ; Child ; Glioblastoma ; Humans ; Hypothalamus ; Korea ; Neurofibromatoses ; Neurofibromatosis 1 ; Radiosurgery ; Recurrence ; Third Ventricle ; World Health Organization ; Young Adult

No abstract available.
Hand

No abstract available.
Aged ; Antigens, CD20/metabolism ; Antigens, CD3/metabolism ; Bile Duct Neoplasms/ultrasonography ; Female ; Humans ; Immunohistochemistry ; Liver Diseases/*pathology/radiography ; Pseudolymphoma/*pathology/radiography ; Tomography, X-Ray Computed

Cystic neoplasms of the pancreas consist of a wide range of pathological entities and are being detected more frequently due to advances in cross-sectional imaging modalities and increasing numbers of periodic health checkups. The majority of pancreatic cystic neoplasms are intraductal papillary mucinous neoplasms, serous neoplasms, and mucinous cystic neoplasms, but recently, rare cases of mucinous non-neoplastic cyst of the pancreas (MNCP) have been reported, and despite the availabilities of modern imaging systems, such as MRI and CT, the differentiation of non-neoplastic and neoplastic cysts remains challenging. Herein, we report our experience of a 65-year-old male case with an MNCP.
Aged ; Humans ; Magnetic Resonance Imaging ; Male ; Mucins ; Pancreas ; Pancreatic Cyst ; Pancreatic Neoplasms

Ceruminous glands are specialized apocrine glands located in the external auditory canal (EAC). Pleomorphic adenoma (PA) of the EAC is derived from these ceruminous glands. Tumors arising from these ceruminous glands are rare. Furthermore, ceruminous PA of the EAC is extremely rare. About 35 cases have been reported to date in the English literature, and only 4 cases have been reported in Korea. There are several controversial issues about these rare tumors such as nomenclature, histogenesis and classification. We report here on two cases of ceruminous PA and review the cases in the Korean literature.
Adenoma ; Adenoma, Pleomorphic* ; Apocrine Glands ; Classification ; Ear Canal* ; Korea

Desmoplastic small round cell tumor (DSRCT) is a rare and aggressive malignancy common in young male patient. Typical imaging features of DSRCT include multiple soft tissue masses in the peritoneal cavity, omentum, or mesentery without an organ of origin. This report presents a rare manifestation of DSRCT revealing a solitary large retroperitoneal mass with hepatic metastasis and malignant portal vein thrombosis in 70-year-old women together with the review of literature. The tumor showed a hemorrhagic and necrotic mass with peripheral portion of T2 hypo-intensity and delayed enhancement that indicated desmoplastic stroma with dense cellularity.
Aged ; Desmoplastic Small Round Cell Tumor ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Mesentery ; Neoplasm Metastasis ; Omentum ; Peritoneal Cavity ; Portal Vein ; Venous Thrombosis