1/35. MR imaging of a case of adenomatoid tumor of the adrenal gland. The aim of this case report is to describe the appearance on magnetic resonance imaging (MRI) of an incidentally found adenomatoid tumor of the adrenal gland, and to evaluate the utility of MRI in characterizing this type of tumor. The appearance of the tumor was nonspecific on T1-weighted in-phase, opposed-phase, and T2-weighted images, as well as its behavior after paramagnetic contrast administration, outlining the differential diagnosis among carcinoma, metastatic tumors, and pheochromocytoma. After surgery, the pathologic diagnosis was adenomatoid benign tumor of mesothelial origin. Although MRI enables the characterization of most benign lesions of the adrenal gland, the appearance of other lesions is nonspecific. In our case, MRI did not assist in preoperative diagnosis, guiding us towards a diagnosis of malignancy. ( info) |
2/35. Fine needle aspiration cytology of adenomatoid tumor. A case report. BACKGROUND: adenomatoid tumor is a benign neoplasm of the male and female genital tract. The epididymis is the most common site. CASE: A 25-year-old male presented with a swelling in the left side of the epididymis. Cytology showed monotonous cells arranged in sheets, cords and glandular patterns. The cell showed eccentric vesicular nuclei with fine chromatin and abundant, vacuolated cytoplasm. CONCLUSION: With the help of fine needle aspiration cytology, an accurate diagnosis of adenomatoid tumor is possible and can relieve anxiety and uncertainty in both the patient and physician. ( info) |
| Reports on the radiological findings of adenomatoid tumor of the uterus are rare, and preoperative diagnosis is very difficult. To our knowledge, there have been no reports concerning the MR findings of adenomatoid tumor of the uterus. We report two cases of uterine adenomatoid tumor that showed the characteristic features of leiomyoma on MR images. ( info) |
4/35. adenomatoid tumor of the uterus in a patient with chronic renal failure. A case of adenomatoid tumor of the uterus in a 34-year-old patient, who had received a renal transplant and was undergoing immunosuppresive therapy is presented. At surgery, there were a total of eight nodular intramural and subserous masses thought to be leiomyoma nodules, and tumor excision was unusually, hardly performed because the nodules were strictly adherent to the myometrium. All the specimens yielded the same pathological diagnosis - adenomatoid tumor. This case is unusual because of the multiple nodular pattern and its association with the immunocompromised status of the patient. Although adenomatoid tumors have not been shown to recur, we are in doubt in our case, because the uterus is still intact and the immunocompromised status of the patient might have a role in the extensive growth and also in the possibility of recurrence. ( info) |
5/35. Composite multicystic mesothelioma and adenomatoid tumor of the ovary: additional observation suggesting common histogenesis of both lesions. An unusual case of composite multicystic mesothelioma and adenomatoid tumor of the ovary is reported. The gradual transitions between both tumor components were well apparent. This observation indicates a histogenetic relationship between adenomatoid tumor and benign multicystic mesothelioma. ( info) |
6/35. Uterine adenomatoid tumors confirmed by immunohistochemical staining. We present a 39-year-old nulliparous woman who consulted our clinic for an 8-year history of infertility with no notable symptoms. There apparent uterine leiomyomas were found incidentally on clinical examination and imaging. The surgically enucleated specimens were white in color with variable consistency poorly defined margins. The tissues stained positive for cytokeratin but were negative for CD34 antibodies, indicating a mesothelial origin. Staining for vimentin and HBME1 was also strongly positive, supporting a mesothelial origin of the tumors. The patient became pregnant 6 months after surgery. A healthy male infant was delivered at term. Immunohistochemical staining establish the diagnosis of benign adenomatoid tumors derived from mesothelial tissue. ( info) |
7/35. Respiratory epithelial adenomatoid hamartoma of the maxillary sinus. A case of respiratory epithelial adenomatoid hamartoma of the maxillary sinus is reported. Glandular hamartomas involving the sinonasal tract have received only limited documentation in the literature. The differential diagnosis of adenomatoid hamartoma includes schneiderian papilloma of the inverted type and adenocarcinoma. Limited but complete surgical resection is the treatment of choice. ( info) |
8/35. Adenomatoid tumors of testis and epididymis: a report of two cases. Adenomatoid tumors are rare benign tumors of female and male genital tracts. In this paper, we reported an epididymal and a testicular adenomatoid tumor in two patients presented with enlarged intrascrotal mass. ( info) |
9/35. Microcystic variant of localized malignant mesothelioma accompanying an adenomatoid tumor-like lesion. The case of a 70-year-old man with a hitherto undescribed pleural mesothelioma is reported. The tumor was localized in the left lung apex and had invaded the parietal pleura. Histologically, the tumor was characterized by a proliferation of epithelioid cells and the formation of microcysts. The tumor cells were positive for calretinin and vimentin, and possessed abundant microvilli, indicating a mesothelial cell origin for the tumor. A high Ki-67 index and mitotic index, and the recurrence of the tumor after surgery, indicated malignancy. Based on the evidence, we propose that the tumor is a microcystic variant of a localized malignant mesothelioma. ( info) |
10/35. Diffuse uterine adenomatoid tumor in an immunosuppressed renal transplant recipient. A case of diffuse adenomatoid tumor of the uterus in an immunosuppressed renal transplant recipient is reported and compared with two previously reported, similar cases. The multinodular uterine lesion grossly resembled intramural leiomyomata except for a mucoid cut surface and a cystic serosal component. The predominant patterns of the tumor were adenoid and angiomatoid with less prominent solid and cystic patterns. Immunohistochemical and ultrastructural studies confirmed the mesothelial nature of the tumor cells. Additionally, there was strong diffuse immunoreactivity for proliferating cell nuclear antigen, a low expression of Ki-67, and weak nuclear p53 staining. The relationship between immunosuppression and diffuse adenomatoid tumors is discussed. ( info) |