Pseudomycetoma for microsporum canis: report of a case diagnosed by fine needle aspiration biopsy. 2007

Oralia Barboza-Quintana, and Raquel Garza-Guajardo, and Carlos Assad-Morel, and Nora Méndez-Olvera
Anatomic Pathology and Cytopathology Service, University Hospital Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Mexico. oralibarboza@hotmail.com

BACKGROUND Fine needle aspiration biopsy (FNAB) of the skin is useful in subcutaneous lesions. Dermatophytes are almost exclusively superficial cutaneous mycoses and constitute 70-80% of all mycoses and 5% of dermatologic consultations. Inflammatory and invasive forms, as well as infections that remain in chronic forms or persist in spite of treatment, are more frequent in immunocompromised individuals. The clinicalpresentations of these invasive cases are dermatopbytic granulomas (granuloma of Wilson-Majocchi and pseudomycetoma) or Hadida's disease. METHODS A 17-year-old male with an 8-year history of tinea capitis and multiple kerion lesions in the occipital region, left foot and right elbow resistant to conventional treatment was diagnosed by KOH tests and cultures as Microsporum canis. Two months before consultation he noticed the slow growth of a subcutaneous nodule in the base of the neck. FNAB of the neck nodule was performed. The diagnosis of pseudomycetoma by Microsporum canis was made. CONCLUSIONS We report a case of pseudomycetoma caused by Microsporum canis, with the diagnosis made by FNAB. This case appears to be the first one diagnosed by this method in a human.

UI MeSH Term Description Entries
D007121 Immunocompetence The ability of lymphoid cells to mount a humoral or cellular immune response when challenged by antigen. Competence, Immunologic,Immunologic Competence,Immunological Competence,Competence, Immunological
D008264 Macrophages The relatively long-lived phagocytic cell of mammalian tissues that are derived from blood MONOCYTES. Main types are PERITONEAL MACROPHAGES; ALVEOLAR MACROPHAGES; HISTIOCYTES; KUPFFER CELLS of the liver; and OSTEOCLASTS. They may further differentiate within chronic inflammatory lesions to EPITHELIOID CELLS or may fuse to form FOREIGN BODY GIANT CELLS or LANGHANS GIANT CELLS. (from The Dictionary of Cell Biology, Lackie and Dow, 3rd ed.) Bone Marrow-Derived Macrophages,Monocyte-Derived Macrophages,Macrophage,Macrophages, Monocyte-Derived,Bone Marrow Derived Macrophages,Bone Marrow-Derived Macrophage,Macrophage, Bone Marrow-Derived,Macrophage, Monocyte-Derived,Macrophages, Bone Marrow-Derived,Macrophages, Monocyte Derived,Monocyte Derived Macrophages,Monocyte-Derived Macrophage
D008297 Male Males
D008864 Microsporum A mitosporic Oxygenales fungal genus causing various diseases of the skin and hair. The species Microsporum canis produces TINEA CAPITIS and tinea corporis, which usually are acquired from domestic cats and dogs. Teleomorphs includes Arthroderma (Nannizzia). (Alexopoulos et al., Introductory Mycology, 4th edition, p305) Microsporon,Microsporons,Microsporums
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D014006 Tinea Capitis Ringworm of the scalp and associated hair mainly caused by species of MICROSPORUM; TRICHOPHYTON; and EPIDERMOPHYTON, which may occasionally involve the eyebrows and eyelashes. Kerion Celsi,Tinea Capitis Profunda,Trichophytia Profunda Barbae,Trichophytia Profunda Capitis,Barbae, Trichophytia Profunda,Capitides, Trichophytia Profunda,Capitis Profunda, Tinea,Capitis Profundas, Tinea,Capitis, Trichophytia Profunda,Profunda Barbae, Trichophytia,Profunda Capitides, Trichophytia,Profunda Capitis, Trichophytia,Profunda, Tinea Capitis,Profundas, Tinea Capitis,Tinea Capitis Profundas,Trichophytia Profunda Capitides
D044963 Biopsy, Fine-Needle Using fine needles (finer than 22-gauge) to remove tissue or fluid specimens from the living body for examination in the pathology laboratory and for disease diagnosis. Aspiration Biopsy, Fine-Needle,Fine Needle Biopsy,Fine-Needle Aspiration,Aspiration Biopsies, Fine-Needle,Aspiration Biopsy, Fine Needle,Aspiration, Fine-Needle,Aspirations, Fine-Needle,Biopsies, Fine Needle,Biopsies, Fine-Needle,Biopsies, Fine-Needle Aspiration,Biopsy, Fine Needle,Biopsy, Fine-Needle Aspiration,Fine Needle Aspiration,Fine Needle Biopsies,Fine-Needle Aspiration Biopsies,Fine-Needle Aspiration Biopsy,Fine-Needle Aspirations,Fine-Needle Biopsies,Fine-Needle Biopsy,Needle Biopsies, Fine,Needle Biopsy, Fine

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