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technique&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">What Is Your Diagnosis&#63;</span></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Diagnosis</span><p id="par0030" class="elsevierStylePara elsevierViewall">Actinomycetoma of the foot&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Clinical Course and Treatment</span><p id="par0035" class="elsevierStylePara elsevierViewall">Filamentous gram-positive bacteria consistent with <span class="elsevierStyleItalic">Actinomyces</span> species were observed in culture &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The patient received 3 cycles of treatment&#44; each administered 2 months apart&#44; with intramuscular amikacin at a dose of 500<span class="elsevierStyleHsp" style=""></span>mg&#47;d for 21 days and treatment with trimethoprim&#47;sulfamethoxazole at a dose of 2<span class="elsevierStyleHsp" style=""></span>g&#47;d for 6 months&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">The symptoms recurred 6 months and 1 year later&#44; and the patient received treatment with amikacin at the same dose as before&#46; Clinical and microbiologic cure was achieved 1 year after treatment ended&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Comment</span><p id="par0050" class="elsevierStylePara elsevierViewall">Mycetoma is a chronic suppurative infection caused by <span class="elsevierStyleItalic">Actinomyces</span> bacteria or eumycetes&#46; Actinomycosis of the foot is caused by inoculation following trauma&#59; it is most common in men between the ages of 30 and 50 years in barefoot-walking populations&#44; 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Journal Information
Vol. 105. Issue 2.
Pages 191-192 (March 2014)
Visits
6066
Vol. 105. Issue 2.
Pages 191-192 (March 2014)
Case for Diagnosis
Full text access
Poorly Circumscribed, Long-Standing Tumor on the Foot of an Immigrant
Tumoración mal delimitada de larga evolución en el pie de un inmigrante
Visits
6066
P. Giavedoni
Corresponding author
giavedonip@gmail.com

Corresponding author.
, A. Barreiro-Capurro, J. Ferrando
Servicio de Dermatología, Hospital Clínic, Universidad de Barcelona, Barcelona, Spain
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Medical History

A 39-year-old Moroccan man with no relevant past history consulted for assessment of diffuse, painful swelling of the right foot, accompanied by redness and small ulcers with secretion. The symptoms had first appeared 1 year earlier. The patient reported no trauma to the area and presented no other symptoms.

Physical Examination

Physical examination of the right foot revealed indurated, poorly defined nodules with purulent secretion (Fig. 1).

Figure 1
(0.14MB).
Additional Tests

Magnetic resonance imaging revealed soft tissue involvement, fungoid masses, nodular lesions, and a lytic lesion in the first metatarsal.

Histopathology

Histologic examination with hematoxylin-eosin staining revealed dermal abscesses surrounded by fibrous tissue (Fig. 2A). At higher magnification, structures formed by basophilic granulations surrounded by an eosinophilic hyaline material were observed inside the abscesses (Fig. 2B). Abundant polymorphonuclear neutrophils, plasma cells, histiocytes, and necrotic material were observed in the periphery (Fig. 2C). These structures were stained with the periodic acid–Schiff (PAS) technique.

Figure 2.

A, Hematoxylin-eosin, original magnification ×40. B, Hematoxylin-eosin, original magnification ×100. C and D, Hematoxylin-eosin, original magnification ×200.

(0.37MB).

What Is Your Diagnosis?

Diagnosis

Actinomycetoma of the foot.

Clinical Course and Treatment

Filamentous gram-positive bacteria consistent with Actinomyces species were observed in culture (Fig. 2).

The patient received 3 cycles of treatment, each administered 2 months apart, with intramuscular amikacin at a dose of 500mg/d for 21 days and treatment with trimethoprim/sulfamethoxazole at a dose of 2g/d for 6 months.

The symptoms recurred 6 months and 1 year later, and the patient received treatment with amikacin at the same dose as before. Clinical and microbiologic cure was achieved 1 year after treatment ended.

Comment

Mycetoma is a chronic suppurative infection caused by Actinomyces bacteria or eumycetes. Actinomycosis of the foot is caused by inoculation following trauma; it is most common in men between the ages of 30 and 50 years in barefoot-walking populations, agricultural workers, immunodeficient patients, and homeless persons.1

The prevalence of the disease has increased in Europe and the United States as a result of immigration and travel from endemic areas.2 Clinically, it is characterized by swelling, abscesses, fistulization, and secretion of discharge containing colored granules. The color of these granules can be the key to diagnosis. The techniques used to diagnose the disease also include imaging, cytology, histology, immunodiagnosis, and, most importantly, culture. DNA sequencing is useful in cases in which the culture is negative.3

The incubation period ranges from weeks to months. Initially asymptomatic, the disease progresses by infecting deep tissues, forming abscesses, fistulas, and pseudotumors.

The disease is usually diagnosed at advanced stages of progression. Actinomycetoma can progress rapidly and lead to risk of amputation, and it can even lead to death by means of systemic dissemination. However, actinomycetoma responds better to antibiotic treatment than eumycetoma does. Local complications can lead to extensive, disfiguring scars.4 Diagnosis requires a detailed medical history and physical examination. The color of the granules should raise the suspicion of actinomycetoma or eumycetoma.5

The differential diagnosis should include other local infectious processes such as botryomycosis as well as various tumors.6

Treatment is based on expert opinion—no evidence-based studies have been carried out—and lasts between 3 and 18 months. Surgery is necessary in many cases of eumycetoma.

Conflicts of Interest

The authors declare that they have no conflicts of interest.

Acknowledgments

We would like to thank Dr. Josep Arimany for allowing us to study and treat his patient.

References
[1]
A. Bonifaz, G. Ibarra, A. Saúl, V. Paredes-Solis, E. Carrasco-Gerard, L. Fierro-Arias.
Mycetoma in children: Experience with 15 cases.
Pediatr Infect Dis J, 26 (2007), pp. 50-52
[2]
M. Malone, A. Gannass, F. Bowling.
A chronic, destructive mycetoma infection in a diabetic foot in Saudi Arabia.
Int J Low Extrem Wounds, 10 (2011), pp. 12-15
[3]
M. Escoda, M. Gardiello, J.M. Muntané.
Úlceras dolorosas en la lengua.
Actas Dermosifiliogr, 104 (2013), pp. 77-78
[4]
R. Tilak, S. Singh, A. Garg, J. Bassi, V. Tilak, A.K. Gulati.
A case of Actinomycotic mycetoma involving the right foot.
J Infec Dev Ctries, 3 (2009), pp. 71-73
[5]
J.F. Meis, R.A. Schouten, P.E. Verweij, W. Dolmans, J.F. Wetzels.
Atypical presentation of Madurella mycetomatis mycetoma in a renal transplant patient.
Transpl Infect Dis, 2 (2000), pp. 96-98
[6]
A. Molina-Ruiza, E. Pérez-Vegab, T. Zulueta-Doradoc.
Úlcera plantar crónica en inmigrante africano.
Actas Dermosifiliogr, 103 (2012), pp. 733-734

Please cite this article as: Giavedoni P, Barreiro-Capurro A, Ferrando J. Tumoración mal delimitada de larga evolución en el pie de un inmigrante. Actas Dermosifiliogr. 2014;105:191–192.

Copyright © 2013. Elsevier España, S.L. and AEDV
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