Sentinel lymph node biopsy in patients with "atypical Spitz tumors." A report on 12 cases.

Abstract:

:The distinction between Spitz nevus and melanoma is currently possible, applying a set of definite histological criteria. However, in certain lesions deviating from the stereotypical morphology of classic Spitz nevi ("atypical Spitz tumors"), the differentiation between benign and malignant cases appears problematic because objective criteria for a reliable diagnosis are lacking. We report the clinicopathologic findings of 12 patients with atypical Spitz tumors, who underwent sentinel node biopsy. All the tumors, composed of spindle and/or epithelioid cells, histologically showed features referable to Spitz nevi mixed to features generally found in malignant melanomas. Nine patients were females and three males, ranging in age from 2 to 48 years (mean, 23.2 years). The size of lesions ranged from 5 to 9 mm, the thickness from 1.12 to 5.70 mm. Nodal micrometastases were found in 4 (33.3%) patients. Among the patients with positive sentinel node, two showed minimal nodal involvements; one patient showed additional tumor deposits in one nonsentinel regional node. All patients are alive and free of disease with a follow-up of 2 to 90 months (mean, 26.3 months). Metastasizing and nonmetastasizing cases appeared clinically and histologically indistinguishable. The statistical analysis showed no significant difference between the two groups. Results suggested that all the reported cases may constitute a relatively homogeneous morphological group of lesions with a relevant metastatic potential that may be underdiagnosed.

journal_name

Hum Pathol

journal_title

Human pathology

authors

Urso C,Borgognoni L,Saieva C,Ferrara G,Tinacci G,Begliomini B,Reali UM

doi

10.1016/j.humpath.2006.02.001

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

816-23

issue

7

eissn

0046-8177

issn

1532-8392

pii

S0046-8177(06)00079-7

journal_volume

37

pub_type

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