The American journal of surgical pathology
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Am. J. Surg. Pathol. · Jun 2000
Comparative StudyAggressive digital papillary adenocarcinoma (aggressive digital papillary adenoma and adenocarcinoma revisited).
In 1987 a clinicopathologic study by the Armed Forces Institute of Pathology (AFIP) of rare sweat gland tumors, termed aggressive digital papillary adenoma and adenocarcinoma, was published. Since that time, the AFIP has continued to collect these tumors for study. Based on additional follow-up data, we think the original classification of these tumors requires revision. ⋯ Pulmonary metastases were observed in five cases. No effective treatment for widespread metastatic disease has yet been developed. Because histologic features with prognostic significance could not be demonstrated in this retrospective review, we propose that all aggressive digital papillary tumors be designated aggressive digital papillary adenocarcinoma.
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Am. J. Surg. Pathol. · Jan 2000
Comparative StudyIdiopathic nonspecific interstitial pneumonia: prognostic significance of cellular and fibrosing patterns: survival comparison with usual interstitial pneumonia and desquamative interstitial pneumonia.
Nonspecific interstitial pneumonia (NSIP) has been proposed as a histologic subtype of idiopathic interstitial pneumonia with lung biopsy findings that are inconsistent with those of other idiopathic interstitial pneumonias. NSIP has a broad spectrum of histologic findings and a variable prognosis. The aim of this study was to determine whether it would be preferable to subdivide NSIP into cellular and fibrosing patterns. ⋯ The difference, however, was more evident at 5 years (43% vs 90%) than at 10 years (15% vs 35%). The 5- and 10-year survival of patients with idiopathic NSIP, cellular pattern and DIP was 100%, which was significantly better than that of patients with idiopathic UIP (p <0.0001). Based on these data, NSIP should be separated into cellular and fibrosing patterns, because these histologic patterns are associated with different clinical characteristics and prognoses.
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Am. J. Surg. Pathol. · Nov 1999
Chondrosarcoma of the base of the skull: a clinicopathologic study of 200 cases with emphasis on its distinction from chordoma.
Conventional chondrosarcoma (CSA) of the skull base is an uncommon neoplasm that can resemble chordoma, and indeed it is misdiagnosed frequently as such. This has important clinical implications, because when treated with similar aggressive treatment strategies, CSA has a much better prognosis than chordoma. In an effort to identify those morphologic and immunohistochemical features that help to identify conventional skull base CSA correctly and to understand its prognosis better, particularly compared with chordoma, when treated with surgery and proton beam irradiation, the authors performed a clinicopathologic analysis of 200 CSAs. ⋯ The 5- and 10-year local control rates were 99% and 98% respectively, and the 5- and 10-year disease-specific survival rates were both 99%. In contrast to CSA, the 5- and 10-year survival rates of chordoma have been reported to be approximately 51 % and 35% respectively, and in our institution intensive treatment has resulted in 5- and 10-year progression-free survival rates of 70% and 45% respectively. CSA of the skull base can be distinguished reliably from chordoma, and this distinction is important because skull base CSA has an excellent prognosis when treated with surgery and proton beam irradiation, whereas chordomas have a substantially poorer clinical course despite similar aggressive management.
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Am. J. Surg. Pathol. · Aug 1999
The incidence of spermatic cord structures in inguinal hernia sacs from male children.
Inguinal herniorrhaphy is a common surgical procedure in children. Controversy exists regarding the usefulness of microscopic examination of hernia sacs, and changes in reimbursement schemes have heightened this controversy. We summarize our experience with histologic examination of these specimens to establish benchmarks for the number of spermatic cord structures in inguinal hernia sacs from male children. ⋯ Our study helps to provide surgeons with information for preoperative counseling regarding potential injury to the vas deferens or epididymis. This study provides baseline comparison data for quality improvement programs. We believe that each institution should weigh the costs, risks, and benefits of performing microscopic examinations on hernia sacs, depending on their own experience and data.
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Am. J. Surg. Pathol. · Oct 1998
Papillary glioneuronal tumor: a new variant of mixed neuronal-glial neoplasm.
We describe the clinicopathologic features of nine cases of a unique papillary glioneuronal tumor (PGNT) exhibiting astrocytic as well as extensive and varied neuronal differentiation. The four male and five female patients studied ranged in age from 11 to 52 years (mean 27.7 years). They either presented with mild neurologic symptoms or were asymptomatic. ⋯ No mitotic activity or necrosis was noted. The proportions of the two components varied, but essential morphologic findings were identical in all cases. In that the clinical, radiographic, and morphologic characteristics of PGNT are distinctive, it appears to represent a previously undescribed form of mixed neuronal-glial tumor of the central nervous system.