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Biomedical subjects

P Sau

Publications and source records attributed to P Sau.

50 records · Page 3Linked to original sources
PubMed1992

Churg-Strauss syndrome.

A 62-year-old woman who had a history of asthma and allergic rhinitis developed bilateral pulmonary infiltrates and marked eosinophilia. A transbronchial biopsy specimen did not help clarify the diagnosis. She later developed erythematous nodules on her feet; results of a biopsy specimen revealed necrotizing extravascular granulomas and marked infiltration of the dermis with eosinophils consistent with a diagnosis of Churg-Strauss syndrome. Skin manifestations are often nonspecific in this syndrome and occur in approximately two thirds of cases.

Churg-Strauss Syndrome↗
PubMed1992

Trichogerminoma. Report of 14 cases.

We report 14 cases of trichogerminoma, a rare form of cutaneous adnexal neoplasm, derived from hair germ epithelium. The neoplasms occurred in 9 men and 5 women. Their ages ranged from 16 to 73 years (median 53 years). The tumors were slow growing, asymptomatic dermal or subcutaneous nodules, located on the head and neck (6), trunk (4), extremities (2) and hip (1), with no distinguishing clinical features. Histologically, trichogerminomas were characterized by sharply circumscribed, pseudoencapsulated dermal and subcutaneous nodules, ranging in size from 0.4 to 4.0 cm in diameter (mean 1.9 cm). The nodules were subdivided into lobules separated by variable amounts of stroma that demonstrated varying cellularity and mucin content. The lobules were composed of basaloid cells that formed densely packed, round nests or "cell balls" resembling hair bulbs. The basaloid cells demonstrated peripheral palisading, keratinization and differentiation towards various pilosebaceous structures. Retraction spaces, well developed hair follicles and hair shafts were not observed. These distinctive histologic features separated these neoplasms from other tumors of pilar origin and from basal cell carcinoma. The trichogerminomas behaved in a benign fashion with one exception. Complete excision of the lesions is the treatment of choice.

Adolescent↗
PubMed1992

The follicular degeneration syndrome in black patients. 'Hot comb alopecia' revisited and revised.

BACKGROUND: The history, physical examination, and histologic findings in 10 black women with a common, distinctive form of scarring alopecia (formerly called hot comb alopecia) were retrospectively studied. A detailed history of hair care habits was obtained, and scalp biopsy specimens were examined after both vertical and transverse sectioning. OBSERVATIONS: Poor correlation is noted between the usage of a hot comb and the onset or progression of disease. The earliest observable histologic abnormality is the premature desquamation of the inner root sheath. In severely affected follicles this is followed by a chain of histologic events leading to complete follicular degeneration. CONCLUSIONS: The term follicular degeneration syndrome (FDS) is proposed for this clinically and histologically distinct form of scarring alopecia. Historical information is incompatible with the hypothesis that hot comb usage causes the alopecia. It remains unclear whether the use of any of a variety of hair care products and techniques plays a role in the pathogenesis of this condition. Premature desquamation of the inner root sheath serves as a histologic marker for FDS follicular degeneration syndrome, and may be an important pathogenetic factor.

Adult↗
PubMed1991

Cutaneous reaction from a broken thermometer.

A cutaneous and soft tissue reaction that resulted from a broken thermometer inside the mouth of a 10-year-old boy is described. Metallic mercury globules and glass pieces were identified in the excised tissue. On histologic examination, a zone of necrosis, polymorphonuclear leukocytes, macrophages, and multinucleated giant cells surrounded metallic mercury that appeared as dark opaque globules. Dense fibrosis and reactive lymphoid hyperplasia were also noted in the dermis and deeper tissues. The gold lysis test, scanning electron microscopy, and energy-dispersive x-ray analysis confirmed the presence of mercury in the tissue. A literature review on cutaneous mercury granuloma illustrates its unpredictable course. The cutaneous reaction may remain localized, but some cases are associated with an elevated mercury level in blood and urine, pulmonary embolism, mercury poisoning, and even with fatal outcome. Various manifestations of mercury poisoning and guidelines for the management of cutaneous mercury granuloma are discussed.

Child↗
PubMed1990

Basal cell carcinoma of the nipple. Report of two cases.

Two cases of basal cell carcinoma of the nipple are presented, bringing the total number of reported cases to 15. The majority, including our two patients, are elderly men. This finding suggests a causal role of exposure to ultraviolet radiation. In our cases excision was curative.

Aged↗
PubMed1989

Pigmented breast carcinoma. A clinical and histopathologic simulator of malignant melanoma.

A case of infiltrating breast carcinoma presenting as a pigmented lesion of the areola and nipple is described. The pigmentation was found to be primarily due to interspersed melanocytes and melanophages within the tumor. The histologic criteria and the differential immunohistochemical staining characteristics of melanoma and breast carcinoma are presented. Also emphasized is the difficulty in differentiating pagetoid malignant melanoma and epidermotrophic breast carcinoma.

Biopsy↗