Phyllodes tumor of borderline malignancy: seven year follow up with immunohistochemical study

The patient was 80 years old when she initially presented with a left breast mass. Originally, a needle biopsy showed benign stromal and ductal cells. Five years later, the breast mass increased in size and a core needle biopsy showed a biphasic intraductal papillomatous tumor with cellular stroma. Eighteen months later, another biopsy was taken from the breast mass, revealing a well-developed phyllodes tumor (PT) of borderline malignancy. One month later, a simple mastectomy was performed for this 87-year-old woman. Histolopathologic and immunohistochemical studies, including estrogen and progesterone receptors, Ki-67 and p53, performed on tissues from the different biopsy specimens confirmed the progressive transition of the tumor in a 7 year period. An increase in mitotic activity was noted in the later samples. Similarly, percentages of p53- and Ki-67-positive cells were much higher in the stromal and ductal cells of the later samples compared to the original specimen. These findings support the notion that Ki-67 and p53 immunohistochemical staining may be used as simple and practical markers for the evaluation of the malignant potential of PT.     

Enteroviraf RNA in endomyocardial biopsy tissues of myocarditis and dilated cardiomyopathy

Enteroviruses are potential etiologic agents of myocarditis and dilated cardiomyopathy (DCM). A recently developed molecular approach has offered evidence of viral infection by detecting the virus genome. The nested reverse transcrip-tase polymerase chain reaction (nRT-PCR) was used to detect enteroviral RNA in endomyocardial biopsy tissues of myocarditis and DCM. The authors examined 44 tissues obtained from 36 patients with myocarditis, as well as from 10 patients with non-infectious cardiac diseases as controls.
Enteroviral RNA was detected in 12 of 36 patients with myocarditis. The second endomyocardial biopsy was carried out in five of the patients, in whom enteroviral RNA was detected at the first biopsy, at intervals from 3 weeks to 8 years after the first biopsy, and enteroviral RNA was found in four and had disappeared in one. In one of the four positive patients at the second biopsy, a third biopsy was carried out 5 months later (6 months after the first), and the RNA was detected. Active myocarditis became clinically and microscopically mild at the second and third biopsies. In one patient who developed DCM, enteroviral RNA was also detected at a second biopsy performed 8 years after the first. Enteroviral infection is a probable cause of myocarditis and enterovirus-infected myocarditis may progress to DCM.     

Cytology of solid and papillary epithelial neoplasms of the pancreas: a case report

A case of rare pancreatic tumor in a 39-yr-old woman is reported. Fine-needle aspiration biopsy was performed; frozen sections later allowed definite diagnosis. Cytologic features of the tumor are described, and histogenesis is discussed.     

Diagnosis of metastatic appendiceal adenocarcinoid in liver by fine-needle aspiration cytology

A 70-yr-old woman presented with symptoms clinically attributed to acute appendicitis. An adenocarcinoid tumor of the appendix was resected, followed by right hemicolectomy with negative lymph nodes. Seven years later, a fine-needle aspiration biopsy was performed on one of multiple hepatic nodules, revealing metastatic adenocarcinoid. the cytopathologic features of the metastatic tumor are described.     

Cytodiagnosis of a meningeal fibrosarcoma metastatic to the thyroid gland

A case of primary leptomeningeal fibrosarcoma metastatic to the thyroid gland, diagnosed by fine needle aspiration biopsy is described. The patient, a 39-year-old women was initially diagnosed with a leptomeningeal fibrosarcoma. Sections of the primary tumor studied by electron microscopy showed that the tumor cells have the ultrastructure features of a fibroblast. She underwent tumor resection, followed by chemotherapy and local radiotherapy. Four months later, she presented with dysphagia. Ultrasonography confirmed the presence of a 2-cm mass in the right lobe of thyroid. A fine needle aspiration biopsy was performed. Light microscopy showed interwoven bundles of neoplastic spindle cells similar to the primary tumor, consistent with a metastatic fibrosarcoma. To our knowledge, this is the first report of a primary meningeal fibrosarcoma that metastasized to the thyroid gland, which was diagnosed by a fine needle aspiration biopsy.     

Malignant transformation of osteoblastoma: study using image analysis microdensitometry.

AIM--To determine if the malignant transformation, as perceived histologically, in a case of osteoblastoma from the right femur, was also expressed as a quantitative change in nuclear DNA during tumour progression over five months. METHODS--Nuclear DNA microdensitometry by computer image analysis was used to acquire relative DNA distribution patterns. Tissue had been removed on four separate occasions from a lesion in the right femur of an 18 year old man. Retrospective DNA analysis was performed on formalin fixed, paraffin wax-embedded tissue. RESULTS--The DNA profile of the initial biopsy specimen, which was histologically diagnosed as osteoblastoma, was euploid with a near diploid (2c) modal DNA. The second biopsy specimen taken one month later also resembled osteoblastoma but showed an aneuploid DNA profile with a diploid modal DNA and some nuclei with ploidy greater than 5c. The third biopsy specimen taken four months later showed histological evidence of osteosarcoma and a near pentaploid (5c) modal DNA with large number of nuclei exceeding 5c. CONCLUSIONS--DNA microdensitometry confirmed the initial and final diagnosis. The technique also seems to be capable of detecting aneuploidy before malignancy is morphologically evident.     

Histological patterns and associated PSA levels for prostatic adenocarcinoma following brachytherapy

Changes in morphologic patterns over a time course following radiation and their corresponding PSA levels were investigated. A total of 60 patients with prostatic adenocarcinoma treated with brachytherapy between 1993 and 2003, who had at least one positive post-radiation biopsy, were evaluated for their morphologic patterns as well as the associated PSA levels. A total of 86 positive post-radiation biopsies were performed. There were 17 patients with more than 1 positive post-radiation biopsy and 43 patients with single positive biopsy. Among the 17 with more than 1 positive biopsy, the morphologic patterns of treatment effect were commonly followed by patterns without treatment effect on subsequent biopsies. The morphology without treatment effect followed by treatment effect was infrequent. Furthermore, over a time course, the later the positive post-radiation biopsy, the much more common the morphologic pattern without treatment effect was observed. Compared to the morphologic pattern with treatment effect, the morphology without treatment effect was associated with a significantly higher PSA level (mean 0.69 versus 2.78 ng/ml, p<0.05). An increase in the Gleason's score in recurrent carcinoma was also noted in 14% of the cases. Multiple factors were likely involved in the variability of the changes in post-radiation morphologic patterns. A new neoplastic process was particularly considered in some of our cases, which may merit clinical attention. The significant difference in PSA levels between carcinomas without treatment effect and those with treatment effect also suggested a post-radiation variation of tumor biology and a potential role of these patterns in monitoring and managing the patients treated with brachytherapy.     

Cryptococcosis of thoracic vertebra simulating tuberculosis: diagnosis by fine-needle aspiration biopsy cytology--a case report.

A rare case of cryptococcosis of sixth thoracic vertebra (T6) along with pulmonary involvement in an old diabetic patient is presented. The infection resulted in lytic lesion of T6 vertebra and girdle pain. A computerized tomographic (CT) guided fine-needle aspiration biopsy (FNAB) cytology was performed, which showed encapsulated fungal spores of Cryptococcus neoformans with granulomatous reaction, later confirmed by fungal culture.     

Hepatocellular carcinoma diagnosed by fine-needle aspiration of the parotid gland

Hepatocellular carcinoma rarely metastasizes to the salivary glands. We report a case of a 47-yr-old man who presented with a right parotid lesion that was diagnosed by fine-needle aspiration (FNA) biopsy as a metastatic lesion suggestive of hepatocellular carcinoma with similar findings in a subsequent intraoral incisional biopsy. The patient's serum alpha-fetoprotein level was within normal limits at the time of diagnosis. CT scan revealed a mass in the liver, but a liver biopsy was not performed. The patient deteriorated rapidly and died about 4 mo later. An autopsy confirmed the presence of hepatocellular carcinoma with distant metastases to unusual sites, including the parotid gland, orbit, and calvarium, bypassing more common sites such as the lungs. This is the second known reported case in which hepatocellular carcinoma presented as a salivary gland metastasis. In both cases the diagnosis was made by FNA biopsy, illustrating the utility of this method for diagnosing uncommon metastatic salivary gland lesions.     

Osteosarcoma metastatic to adrenal gland diagnosed by fine-needle aspiration

Osteosarcoma, a primary malignant tumor of the long bones, frequently metastasizes to the lungs. We report an unusual case of osteosarcoma metastatic to the right adrenal gland in a 37-yr-old male who presented 8 yr after remission with an adrenal mass. A preoperative diagnosis was made by fine-needle aspiration (FNA) biopsy. FNA biopsy revealed pleomorphic oval cells with prominent nucleoli, spindle cells, and giant tumor cells. Diagnostic osteoid was readily seen on smears and was also detected by polarization of cell-block section. Immunocytochemical stains revealed positivity of tumor cells for vimentin and osteonectin. Cytokeratin stains were negative. The cytologic diagnosis of metastatic Osteosarcoma was made, which was later confirmed upon resection of tumor by histology. Although the role of FNA in the diagnosis of primary bone tumors, including osteogenic sarcoma (OGS), remains controversial, this case, however, demonstrates the value of FNA biopsy combined with immunocytochemistry performed on the aspirated material in diagnosing osteosarcoma from an unusual location such as the adrenal gland.     

Human trophectoderm biopsy and secretion of chorionic gonadotrophin.

We have previously developed a technique of trophectoderm biopsy to obtain cells from human blastocysts for preimplantation genetic diagnosis. To determine whether this technique affects the subsequent development of the blastocyst, 45 manipulated blastocysts were observed from days 3 to 14 in culture, the amount of human chorionic gonadotrophin (HCG) secreted by each embryo was measured and these results were compared with those of 26 non-manipulated controls documented in a previous study. A slit was made in the zona pellucida opposite the inner cell mass in 18 of the 45 blastocysts. This increased the rate of hatching but the other morphological changes up to day 14 were similar to those seen in the non-manipulated controls. There was no difference in the mean cumulative HCG secretion by these zona-slit controls (149.8 +/- 45.7 mIU/ml) compared to the non-manipulated controls (146.2 +/- 23.7 mIU/ml). A slit was also made in the zona pellicida of the other 27 blastocysts. Approximately 12-18 h later, in 18 blastocysts a biopsy of the herniating trophectoderm cells (5-30) was performed. The rate of hatching and adherence to the culture dish was similar to the non-manipulated controls. The mean cumulative HCG secretion decreased significantly (57.5 +/- 16.2 mIU/ml, P less than 0.01) after the biopsy procedure. However, if a small biopsy was performed (less than 10 cells removed) the decrease in HCG secretion (87.6 +/- 24.8 mIU/ml) was not significant, whereas when a large biopsy was performed (greater than 10 cells), HCG levels fell to 19.9 +/- 9.1 mIU/ml.(ABSTRACT TRUNCATED AT 250 WORDS)     

Emmonsia crescens infection in a British water vole (Arvicola terrestris).

Emmonsia crescens, a dimorphic fungus of the order Onygenales, is primarily a pathogen of lower animals and rarely humans. Inhaled conidia of E. crescens fail to germinate in the lungs, and instead simply enlarge in lung tissue to become giant adiaspores. We present here the case of fatal Emmonsia crescens infection in a wild-caught British water vole (Arvicola terrestris). Histopathological examination of the animal, which died in captivity, revealed a multifocally extensive granulomatous reaction containing oval adiaspores scattered irregularly throughout the lungs. Mycological examination of fungus cultured from lung tissue and PCR amplification and sequencing of rDNA gene fragments of the cultured organism confirmed the diagnosis of massive infection by E. crescens.     

Bilateral ethmoid sinusitis with unilateral proptosis as an initial manifestation of metastatic prostate carcinoma.

This article presents a case of bilateral ethmoid sinusitis with unilateral proptosis as a presenting sign of an unsuspected prostate carcinoma. A 59-year-old Hispanic male presented to his primary care physician with nasal congestion and rhinitis. He was treated with antibiotics and antihistamine decongestants for 3 weeks without improvement. A trial of steroids resulted in brief improvement followed by a rapid onset of nasal obstruction with proptosis. A computed tomography scan revealed opacification of the ethmoid sinus with right proptosis. The presumptive diagnosis was orbital cellulitis secondary to chronic ethmoid sinusitis. Endoscopic sinusotomy and bilateral ethmoidectomies were performed. Biopsy results returned as metastatic adenocarcinoma, probably of prostate origin. Urological work-up and evaluation with biopsy confirmed the diagnosis of prostatic carcinoma. The patient was treated with chemotherapy and radiation therapy. He died 7 months later with disseminated disease.     

Diagnostic role of fine-needle aspiration of pancreatic allograft to detect rejection

The purpose of this study was to assess whether the same principles to evaluate renal transplant by fine-needle aspiration (FNA) for rejection could be applied to pancreatic allograft. Between 1996-1998, 25 ultrasound-guided FNAs on 13 patients with pancreatic allograft were performed and ThinPrep made. The percentage of lymphocytes, lymphoblasts, monocytes, eosinophils, plasma cells, immunoblasts, and macrophages were calculated. Simultaneous peripheral smear was obtained and "total corrected increment" score calculated. Subsequent core biopsy was available in six patients. A total of seven FNAs on three patients were inadequate because of insufficient epithelial cells. No evidence of rejection reported in nine patients was confirmed on biopsy in five patients. One patient reported as suspicious later showed rejection on biopsy. Thus, FNA may be used to monitor the graft status with faster turnaround times. Rejection may be a focal process and FNA may be used for sampling multiple sites. Cytologic diagnosis fairly accurately detects early rejection. Core biopsies are warranted in unsatisfactory specimens and when FNA is suspicious for rejection.     

Percutaneous transhepatic biliary biopsy using gastrofiberscopic biopsy forceps.

To obtain a histopathologic diagnosis at the site of a biliary obstruction, we recently have performed 24 cases of biliary biopsy using gastrofiberscopic biopsy forceps (Olympus, Tokyo, Japan) via transhepatic tracts provided in the course of the procedure of percutaneous biliary drainage. Histopathologic diagnosis was successfully made at the first attempt of biopsy procedure but a second trial was made a week later in 6 cases who were negative for malignant cells on the first attempt. The histological results from the biopsy specimens were 18 adenocarcinomas, 5 chronic inflammations and one normal epithelium. Of 6 cases who were negative for malignant cells on forceps biopsy specimen, three cases were confirmed as adenocarcinoma of the ampulla of Vater, adenocarcinoma of the pancreas and chronic pancreatitis by surgical biopsy. The latter was a true negative result, which was diagnosed as chronic inflammation on forceps biopsy and verified as chronic pancreatitis by surgery. The remaining two cases were diagnosed as malignant obstructive jaundice by clinical and radiological follow-up findings. Major complications (bile peritonitis, bleeding, and hemopneumothorax) occurred in 3 patients, which mainly arose in the earlier period of study. This procedure can be performed at the same time as percutaneous transhepatic biliary drainage with low morbidity or mortality, and although the potential for perforation of bile ducts and injury to adjacent blood vessels is considered it is a useful addition to existing biopsy techniques for yielding material sufficient for histologic analysis.     

Transformation of indolent mantle cell lymphoma to pleomorphic mantle cell lymphoma: case report and review of clinical and morphologic variants

We report a case of indolent mantle cell lymphoma with progression to pleomorphic mantle cell lymphoma 8 years after initial presentation. The first lymph node biopsy showed expanded mantle zones composed of uniformly small B lymphocytes. A cyclin D1 immunohistochemical stain was negative and the patient was observed. Eight years later, the patient developed symptomatic splenomegaly. Microscopic examination of the spleen revealed expanded mantle zones with an increased number of large cells with irregular nuclear contours. Immunohistochemistry for cyclin D1 was positive. A repeat cyclin D1 immunohistochemical staining performed on the initial lymph node biopsy was positive, indicating an inadequate initial study. Immunoglobulin heavy-chain gene rearrangement studies confirmed clonal identity. A revised diagnosis of indolent mantle cell lymphoma with progression to pleomorphic mantle cell lymphoma was rendered. The differential diagnosis of mantle cell lymphoma, including clinical and morphologic variants, is discussed.     

Emmonsiosis of subterranean rodents (Bathyergidae, Spalacidae) in Africa and Israel.

The presence of adiaspores of the fungal genus Emmonsia was examined in the lungs of 85 mole rats representing 3 subterranean genera: blind mole rats (Spalax galili and S. golani) from Israel, Ansell's mole-rats (Cryptomys anselli) from Zambia, and silvery mole-rats (Heliophobius argenteocinereus) from Malawi and Zambia. Emmonsiosis was found in 28% of the blind mole rats, 100% of the Ansell's mole-rats, but in none of the silvery mole-rats. Infection in African mole-rats was caused by Emmonsia parva, and infection in Israeli blind mole rats was caused by E. parva and E. crescens. The study indicates that the perennial burrow system of the Ansell's mole-rat forms an appropriate microhabitat for the saprophytic growth of E. parva in Lusaka region, Zambia. We suggest that factors contributing to the striking difference in prevalence of emmonsiosis between the two African mole-rat genera (Cryptomys, Heliophobius) may be their differing burrow types, burrow longevity, and social lives.     

Cytologic diagnosis of metastatic malignant phyllodes tumor of the breast in pleural effusion

A 54‐year‐old woman presented with a left breast mass, discovered 4 years ago but was static until 2 months before presentation, when it showed a rapid increase in size and became painful. Mammography showed a large lobulated mass with internal cystic components (BI‐RADS 4B). A biopsy was performed, followed by modified radical mastectomy. The histologic diagnosis was malignant phyllodes tumor (PT). The patient developed local recurrence 4 months later while on adjuvant radiotherapy and she had a salvage resection. Two months later, she developed massive left pleural effusion. Pleural fluid cytology showed single discohesive markedly atypical cells with hyperchromatic and enlarged nuclei, irregular nuclear membrane, and distinct macronucleoli. Multinucleated forms were also seen. The mononuclear and multinucleated tumor cells cytomorphologically resembled that of the recurrent tumor, indicative of recurrence. Positron emission tomography/computed tomography confirmed recurrence at the left pleura. The patient opted for palliative care and succumbed 1 month later. The current case demonstrated a rare clinical presentation of recurrent malignant PT as massive unilateral malignant pleural effusion. Correlation with previous histologic and cytologic specimens may be useful as similar cytologic features could be identified in subsequent recurrent tumors.