Anatomoclinical and immunohistochemical study of 8 cases of dermatomyofibroma

Copyright © 2020. Published by Elsevier Masson SAS..

INTRODUCTION: Dermatomyofibroma (DMF) is a rare, benign tumour that is little-known among clinicians. However, it has typical clinical, histological and immunohistochemical features that distinguish it from other fibrous tumours.

METHOD: We report herein on the clinical, histological and immunohistochemical aspects of eight cases of DMF identified between 2008 and 2019 at the dermatopathology laboratory of Strasbourg.

RESULTS: Five men and three women of average age at diagnosis of 21 years and 9 months (range: 9 to 54 years) were included. Lesions ranged in size from 1 to 11cm. Most cases involved the upper body (6 cases), with one case on the abdomen and one on the side. The lesions presented as a solitary asymptomatic red or reddish brown nodule or plaque that gradually developed. The plaques were hard and caused functional discomfort on movement of the neck. Well-circumscribed spindle cell proliferation was noted in the reticular dermis parallel to the epidermis, without mitotic figures or cytological atypia. The subcutis was infiltrated in 5 cases. Expression of calponin was positive in all cases but one, while that of caldesmon, PS100 and desmin was negative. Expression of smooth muscle actin was positive in 2 cases, and both cases were also positive for stromylesin-3. CD34 was positive in 2 cases.

DISCUSSION: DMF is an extensive tumour capable of attaining large diameters and must be completely excised. The main differential diagnoses of DMF are dermatofibrosarcoma protuberans, dermatofibroma, fibrous hamartoma, myofibromatosis and cheloid. It can be identified based on various factors, whether clinical (young age, extensive lesion), histological (horizontal proliferation in the reticular dermis) or immunohistochemical (positive expression of calponin).

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:147

Enthalten in:

Annales de dermatologie et de venereologie - 147(2020), 11 vom: 30. Nov., Seite 721-728

Sprache:

Französisch

Weiterer Titel:

Étude anatomoclinique et immunohistochimique de 8 cas de dermatomyofibromes

Beteiligte Personen:

Osché, M [VerfasserIn]
Mitcov, M [VerfasserIn]
Lipsker, D [VerfasserIn]
Cribier, B [VerfasserIn]

Links:

Volltext

Themen:

Dermatofibrosarcoma protuberans
Dermatofibrosarcome
Dermatomyofibroma
Dermatomyofibrome
Fibrous tumour
Immunohistochemistry
Immunohistochimie
Journal Article
Myofibroblast
Myofibroblaste
Tumeur fibreuse

Anmerkungen:

Date Completed 15.10.2021

Date Revised 15.10.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.annder.2020.01.025

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM316294837