Cytologic diagnosis of metastatic germ-cell tumors

The clinical, pathologic and cytologic findings were correlated in 86 cases of metastatic germ-cell tumors. Although the cytologic features of malignant germ-cell tumors are sufficiently characteristic to make specific cytologic diagnosis possible, the diagnostic accuracy can be augmented with cytochemical stains. It was found that due to recent advances in therapy, cytologic detection of metastases does not necessarily indicate a fatal outcome.     

Automated cytopathologic diagnosis of bronchial carcinoma. II. Preliminary results of classifying cytocentrifuged bronchial brushings

An automated discrimination between healthy and neoplastic bronchial cells was performed on eight bronchial smears prepared by cytocentrifugation. An image analyzer was used to examine 415 cells in these smears. The nuclear surface of each cell was measured, as was the total integrated optical density for 25 programmed thresholds. The results show that it is possible to distinguish healthy from cancerous cells in a given subject using these two measured parameters and two new parameters deduced mathematically. It appears difficult, however, to demonstrate a typical healthy and typical cancerous bronchial cell that could be used as a reference for all subjects. It is thus the presence of cell heterogeneity in a given subject that enables him or her to be characterized as healthy or having cancer.     

Polarized cultures of human airway epithelium from nasal scrapings and bronchial brushings

Airway epithelial cultures are generally derived from tracheas postmortem or from surgical specimens of nasal polyps or turbinates. Scrapings of the mucosal surface have been little used as starting material for cultures because of their low yield of epithelial cells and their contamination with mucous secretions, blood, and underlying connective tissue. For the first time, we report that human airway epithelial cells obtained from nasal scrapings or bronchial brushings can be grown in culture to produce polarized cell sheets suitable for studies of vectorial transport.     

Dental developmental status of southern Chinese girls in Hong Kong

Dental developmental status of the permanent canines, premolars and second molars were studied in one hundred and two twelve-year-old Southern Chinese girls born and brought up in Hong Kong. Eruption of these teeth were defined as gingival emergence during the clinical examination while the root development was assessed from orthopantomographs. Root resorption pattern of the primary canines and molars were also studied with the aid of the orthopantomographs. Two-thirds of girls presented with permanent dentition stage. The root resorption patterns of the primary teeth were different from their order of exfoliation. The mandibular permanent teeth were in advanced in both eruption and root development than the corresponding maxillary teeth, except the first premolars.     

Hong Kong: The Anthropology of a Chinese Metropolis

Hong Kong: The Anthropology of. Chinese Metropolis. Grant Evans and Maria Tarn Siu-Mi. eds. Honolulu: University of Hawaii Press, 1997.336 pp.     

香港潜蝇科(双翅目)的分类研究

报道了香港22种潜蝇科昆虫,其中包括5新种、6个中国大陆新记录种。新种模式标本分藏于下列两处： Melanagromyza squamifera sp. nov., Ophiomyia imparispina sp. nov., Phytomyza redunca sp. nov.的模式标本保存于日本东京自然博物馆; Melanagromyza dipetala sp. nov., Ophiomyia vasta sp. nov.的模式标本保存于美国夏威夷比肖普博物馆。     

A new species ofAppendicospora from Hong Kong

A new species ofAppendicospora, A. honkongensis, occurring on fronds ofLivistona chinensis in Hong Kong is described and illustrated with interference contrast micrographs. It differs fromA. coryphae in having larger ascomata and ascospores, and a peridium of brown-walled cells. The differences betweenApiospora andAppendicospora are reexamined in the light of the cultural characteristics of the latter.