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Dermatofibroma on upper extremity in childhood period.

Byline: Mehmet Fethi Ceylan, Ayse Serap Karadag, Gulay Bulut, Omer Calka and Haci Onder E-mail: mfethiceylan@hotmail.com

Dermatofibroma is a common benign mesenchymal tumor composed of fibroblastic and histiocytic cells. It is also known as cutaneous benign fibrous histiocytoma. Although it may occur in any age, it is mostly common at twenties and thirties. It is more common in women than men and it is most seen at lower extremity. Herein, we report a 6-month-old female infant, who had dermatofibroma on her upper extremity.

KEY WORDS: Mesenchymal tumor, Fibrous histiocytoma, Upper extremity, Infant.

How to cite this article:

Ceylan MF, Karadag AS, Bulut G, Calka O, Onder H. Dermatofibroma on upper extremity in childhood period. Pak J Med Sci 2011;27(4):937-939

INTRODUCTION

Dermatofibroma is the most common visible of mesenchymal residues of the skin. It is also called as a cutaneous benign fibrous histiocytoma. Although it may occur in any age, it is mostly common at twenties and thirties. It is more common in women than in men and it is mostly seen at lower extremity.1-3 It is clinically necessary to consider granular cell tumor, clear cell acanthoma, melanoma and dermatofi-

1. Mehmet Fethi Ceylan, MD, Department of Orthopedics and Traumatology,

2. Ayse Serap Karadag, MD, Department of Dermatology,

3. Gulay Bulut, MD, Department of Pathology,

4. Omer Calka, MD, Department of Dermatology,

5. Haci Onder, MD, Department of Orthopedics and Traumatology,1-5: Medicine School of Yuzuncu Yil University, Van, Turkey.

brosarcoma protuberans in the differential diagnosis and sometimes these lesions can only be distinguished by biopsy.3,4 We present our 6-month-old female infant, who had dermatofibroma on her upper extremity.

CASE REPORT

A six-month-old female infant presented to our clinic because of a nodule on the volar surface of the left forearm. The lesion started as a papule, when she was three months old gradually grew to the present size. There was no history of preceding trauma, arthropod bite or similar lesion in her family. On examination of the patient, there was a pink to red-coloured, hard nodule which measured 2x2 cm (Figure.1). The dimple sign was positive.

An excisional biopsy was performed under local and sedation anesthesia in order to confirm the diagnosis (Figure.2). Microscopic examination showed a cutaneous mass, measuring 1.5x2x2 cm. On cut section, the mass was solid and grey areas. No necrosis or cysts were seen. In the histopathological examination, revealed an ill-defined dermal proliferation of elongated fibrohistiocytic cells and sometimes of storiform pattern. It was observed from the vessel that there was the rich tumor formation which is oval or spindle-core and sometimes makes fascicles. Inflammatory infiltration was sometimes noticed. At the borders of the lesion, collagenous nodules were seen entrapped between tumor cells. There was a grenz zone between the tumor and the overlying epidermis, which was focally hyperplasia. Mitotic activity was counted as three in the field of tenner (decimal) magnification (Figure.3).

Immunohistochemistry showed, diffuse strong staining with CD68, focal weak staining with actin in tumor cells, however, there was no staining with S100, desmin and CD34.

The patient's biochemical tests were normal. The lesion was diagnosed as dermatofibroma on clinical and pathological grounds.

DISCUSSION

Dermatofibroma is the most common of mesenchymal residues of the skin and it has first been described by Stout and Lattes in 1967.5 It is also called cutaneous benign fibrous histiocytoma.1 Fibrous histiocytoma is a benign tumor which grows from fibroblastic and histiocytic cells. It commonly occurs in the dermis, but can sporadically be seen in subdermal soft tissue and in parenchymal organs. It is usually seen in sun-exposed areas of the skin.2,6 It can occur in all ages, but it is especially more commonly seen in the age groups of 20 and 30 years. 20% of cases are seen under the age of 17. It occurs more in women than in men, and it mostly involves lowerextremities.1,3

Previously, dermatofibroma cases have been described in the period of infancy, in the nasal cavity, at the base of skull, and on the upper lip.5,7,8 Our case was a 6-month-old female baby, and her lesion was detected on the upper extremity in contrast to the sites commonly seen.

Dermatofibroma can be seen as solitary or multiple. Generalized lesions have also been described. Although generally asymptomatic, they may sometimes be itchy and can ulcerate after trauma.1,6 Although its etiology is not clearly known, it can occur after trauma or arthropod bites. The etiology of our case was uncertain.

The surface of dermatofibroma may be shiny or keratotic, but it is usually brown. Characteristically, it becomes hard, indurated, and mobile. The size ranges from 0.5 to 1 cm, however, dermatofibroma above 5cm is very rare.4 Collapse seen in the lesion which is compressed and created between the thumb and index finger is called dimple sign.1 Dimple sign was positive in our case, which was an important finding in the diagnosis.

Dermatofibroma can sometimes grow very fast, but most of them remain constant for years, and it can sometimes regress with hypopigmentation. It is not necessary to treat as long as it is asymptomatic. The lesion in our case had reached to the size of 2x2 cm from the stage of a papule by growing very rapidly. Generally the tumour does not metastasize and only two cases of cellular dermatofibroma have been described in the literature which metastasized to lymph nodes and lung.3

REFERENCES

1. Harting M, Hicks MJ, Levy ML. Dermal Hypertrophies 'Fitzpatrick's Dermatology in General Medicine' (seventh edition), Wolf K, Goldsmith L, Katz S, Gilchrest B, Paller A and Leffell D (Eds), McGraw Hill, New York. 2008: 556-557.

2. Kamino H, Meehan SA, Pui J. Fibrous and Fibrohistiocytic Proliferations of the Skin and Tendons 'Bolognia Dermatology' (second edition), Bolognia JL, Jorizzo JL and Rapini PR (Eds), Mosby Elsevier, Spain. 2008: 1813-1829.

3. James W, Berger T, Elston D. 'Andrews Diseases of the skin: Clinical Dermatology' (Tenth edition), Saunders Elsevier, Philadelphia. 2008: 611.

4. Lang KJ, Lidder S, Hofer M, Graham C, Taylor A. Rapidly evolving giant dermatofibroma. Case Report Med 2010;620910:1-3.

5. Tubbs RS, Kelly DR, Pugh JL, Loukas M, Oakes WJ. Benign fibrous histiocytoma of the skull base. J Neurosurg 2007;106:65-67.

6.Skoulakis CE, Papadakis CE, Datseris GE, Drivas EI, Kyrmizakis DE, Bizakis JG. Subcutaneous benign fibrous histiocytoma of the cheek. Case report and review of the literature. Acta Otorhinolaryngologica Italica 2007;27:90-93.

7. Shrier DA, Wang AR, Patel U, Monajati A, Chess P, Numaguchi Y. Benign fibrous histiocytoma of the nasal cavity in a newborn: MR and CT findings. Am J Neuroradiol 1998;19:1166-1168.

8. Lee HI, Lee JW, Han TY, Li K, Hong CK, Seo SJ, et al. A case of dermatofibroma of the upper lip. Ann Dermatol 2010;22:333-336.

Authors Contribution::

MFC, ASK, GB, OC and HO conceived designed and did manuscript writing and editing of manuscript. MFC did review and final approval.
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Article Details
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Author:Ceylan, Mehmet Fethi; Karadag, Ayse Serap; Bulut, Gulay; Calka, Omer; Onder, Haci
Publication:Pakistan Journal of Medical Sciences
Article Type:Clinical report
Geographic Code:9PAKI
Date:Sep 30, 2011
Words:1168
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