Fine needle aspiration cytology of polymorphous adenocarcinoma of the salivary glands: A report of 11 patients and review of the literature.

Background: Polymorphous adenocarcinoma (PAC) is a rare malignant tumor of the minor salivary glands. It has an infiltrative growth, variable architectural patterns, neurotropism and cellular monomorphism. Approximately 75% of the cases show a specific mutation in the protein kinase D1 (PRKD1) gene.

Prevalence of abnormal anal cytology and high-grade squamous intraepithelial lesions among a cohort of HIV-infected men who have sex with men.

Background: The incidence of anal cancer among HIV-infected patients is higher than that in other populations. Anal high-grade squamous intraepithelial lesions are considered precursors to invasive squamous-cell carcinomas and are strongly associated to high-risk human papillomavirus infection.

Objective: The aim of this study is to determine the prevalence of anal high-grade squamous intraepithelial lesions through screening based on cytology and high-resolution anoscopy with biopsy in a cohort of HIV-infected men who have sex with men.

Micropapillary carcinoma of the urinary tract: a cytologic study of urine and fine-needle aspirate samples.

Objective: Micropapillary carcinoma (MPC) is an aggressive variant of urothelial carcinoma that needs early and specific recognition. In order to determine whether this tumor variant can be recognized with cytology, we evaluated a large cytohistological series.

Study Design: It was a retrospective cytohistological correlation study including 20 patients with MPC.

Fine-needle aspiration cytology of large cell neuroendocrine carcinoma of the lung: a cytohistologic correlation study of 11 cases.

Background: The classification of pulmonary neuroendocrine neoplasms is particularly controversial. Large cell neuroendocrine carcinoma (LCNEC) has emerged as a separate entity among pulmonary endocrine neoplasms and the criteria for its histologic diagnosis are now well-described. However, cytologic diagnosis presents more difficulties and to the authors' knowledge, few cytologic studies concerning the entity have been published to date.

Cytologic diagnostic accuracy in pleomorphic adenoma of the salivary glands during 2 periods. A comparative analysis.

Objective: To determine if previous experience with the cytologic presentation of pleomorphic adenoma (PA) results in a lower number of diagnostic errors.

Study Design: Comparative analysis of the diagnostic accuracy of PA during 2 periods (1980-1994 and 1995-2003). The first period included 198 tumors and the second, 230.

Cytologic features of pheochromocytoma and retroperitoneal paraganglioma: a morphologic and immunohistochemical study of 13 cases.

Objective: To review the cytologic features and potential pitfalls of pheochromocytoma and retroperitoneal paraganglioma and to evaluate complications of the aspiration procedure and the diagnostic utility of immunocytochemistry.

Study Design: We reviewed 15 cytologic specimens from 12 patients with 13 tumors (1 bilateral case). Ten were adrenal (pheochromocytomas) and 3 extraadrenal paragangliomas.

Fine needle aspiration cytology of dedifferentiated acinic cell carcinoma of the parotid gland: a case report.

Background: Dedifferentiation of acinic cell carcinoma (ACC) to undifferentiated carcinoma occurs rarely and entails a poor prognosis. Most cases of dedifferentiation occur as recurrences of a previously excised ACC. More rarely the neoplasm presents with areas of well-differentiated ACC coexisting with dedifferentiated ones.

Fine needle aspiration of toxoplasmic (Piringer-Kuchinka) lymphadenitis: a cytohistologic correlation study.

Objective: To define the cytomorphologic features of toxoplasmic lymphadenitis (TL) and to establish the diagnostic sensitivity and specificity of the cytologic diagnosis.

Study Design: A cytohistologic correlation study of 11 patients in which a histologic diagnosis of TL was available. These cases were analyzed in a blind study among other cases of nonneoplastic lymphadenopathies.

Fine-needle aspiration cytology of metastatic nasopharyngeal carcinoma.

Cytological features of nasopharyngeal carcinoma (NPC) were reviewed in an attempt to select cytological criteria that permit a specific recognition of metastases. For this purpose, 54 fine-needle aspiration (FNA) procedures from 43 patients with NPC were analyzed. Thirty-two (59.

Fine-needle aspiration cytology of lipoblastoma: a report of two cases.

Lipoblastoma is an uncommon lipomatous tumor that typically occurs in infants and children. It may present as a single subcutaneous nodule or with multiple lesions (lipoblastomatosis). We describe fine-needle aspiration (FNA) cytologic features of two cases that presented as a subcutaneous lump in the scapular area and as a deeply located mass in the left arm.

Fine needle aspiration cytology of endocrine neoplasms of the pancreas. Morphologic and immunocytochemical findings in 20 cases.

Objective: To analyze the role of fine needle aspiration (FNA) cytology in the preoperative diagnosis of pancreatic endocrine neoplasms.

Methods: Cytologic and histologic diagnoses of pancreatic endocrine tumors were reviewed. A total of 20 FNA cytologic procedures from 20 patients were selected.

Cytologic features of clear cell carcinoma of the female genital tract. Diagnostic value of the "raspberry body" in nonexfoliative cytologic specimens.

Objective: To evaluate the presence of basement membrane stromal material in fine needle aspiration (FNA) and scrape cytologic specimens from patients with clear cell carcinoma (CCC) of the female genital tract.

Study Design: The study group consisted of 6 patients with CCC (5 ovarian and 1 cervical). Four samples corresponded to FNA specimens and 3 to scrape material obtained during intraoperative consultation for ovarian tumors.

Cytologic features of round cell liposarcoma: a report on five patients.

Background: Round cell liposarcoma (RCL) and myxoid liposarcoma are now considered as a single pathologic entity for several reasons. Despite many similarities, both morphologic phenotypes may differ considerably, and RCL may be difficult to recognize as liposarcoma. In addition, few cytologic reports describing features of RCL are available.

Fine-needle aspiration cytology of extranodal natural killer/T-cell lymphoma.

Extranodal NK/T-cell lymphoma, nasal type, is a predominantly extranodal lymphoma characterized histologically by prominent necrosis, angiocentric growth, and vascular destruction. Only one report describing its fine-needle aspiration (FNA) cytologic features is available and shows highly unusual findings for a lymphoma. The present case concerns a 58-yr-old patient that presented with a soft tissue mass of the thigh in addition to an ulcerative lesion of the palate and nodular hepatic and splenic lesions.

Cytologic features of alveolar soft part sarcoma: report of three cases.

Alveolar soft part sarcoma (ASPS) is a rare, high-grade, epithelial-like sarcoma that shows characteristic histopathologic findings. Although a chromosomal anomaly that seems specific has been recently described, its diagnosis is based on histologic and ultrastructural features. The tumor shows no specific immunohistologic findings.