Histiocytoid Sweet syndrome may indicate leukemia cutis: a novel application of fluorescence in situ hybridization.

Abstract:

BACKGROUND:In patients with malignancy-associated Sweet syndrome, a thorough evaluation for leukemia cutis should be considered. OBJECTIVE:We sought to describe the clinicopathologic characteristics of histiocytoid Sweet syndrome. METHODS:We retrospectively identified patients with histiocytoid Sweet syndrome at our institution from January 1992 through December 2010. We evaluated the underlying cutaneous infiltrate using immunohistochemistry and fluorescence in situ hybridization. RESULTS:We re-evaluated all 22 patients with hematologic malignancy-associated Sweet syndrome. Six patients had a monocytoid infiltrate that was consistent with histiocytoid Sweet syndrome; subsequent evaluation of these patients demonstrated cytogenetic abnormalities on prior bone-marrow biopsy specimens. Fluorescence in situ hybridization analysis was feasible in cutaneous specimens from 5 of the 6 patients and demonstrated the same cytogenetic abnormalities that were identified on prior bone-marrow biopsy specimens in 4 patients. Therefore, these 4 patients may have had a form of leukemia cutis. LIMITATIONS:This was a retrospective study. CONCLUSION:For patients with histiocytoid Sweet syndrome, an underlying hematologic malignancy, and a monocytoid infiltrate on biopsy specimen, fluorescence in situ hybridization of the cutaneous infiltrate may be beneficial to identify cytogenetic abnormalities that may indicate leukemia cutis.

journal_name

J Am Acad Dermatol

authors

Chavan RN,Cappel MA,Ketterling RP,Wada DA,Rochet NM,Knudson R,Gibson LE

doi

10.1016/j.jaad.2014.01.874

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

1021-7

issue

6

eissn

0190-9622

issn

1097-6787

pii

S0190-9622(14)01005-6

journal_volume

70

pub_type

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