Background
Coccidioidomycosis immitis is a fungal infection. It is most commonly acquired by inhalation of the arthroconidia and results in an asymptomatic respiratory infection in 60%. Of these patients, 20% will develop cutaneous disease such as erythema multiforme or erythema nodosum. In these cases, the skin changes are a hypersensitivity reaction to the fungal antigens.
OUTLINE
EPIDEMIOLOGY CHARACTERIZATION SYNONYMS Sonoran Fever GEOGRAPHYEndemic in Lower Sonoran zone in southern Arizona
DISEASE ASSOCIATIONS CHARACTERIZATION GRANULOMATOUS DERMATITIS Interstitial granulomatous dermatitis associated with pulmonary coccidioidomycosis
David J. DiCaudo, MD
Suzanne M. Connolly, MDScottsdale, Arizona
J Am Acad Dermatol 2001;45:840-5 Abstract quote
Background: Coccidioides immitis is a soil-dwelling fungus found in arid regions of the Western Hemisphere. Interstitial granulomatous dermatitis is a histopathologic pattern that may be a reactive manifestation of diverse systemic diseases.
Objective: Our purpose was to describe clinical and histopathologic findings in 5 patients who presented with interstitial granulomatous dermatitis associated with pulmonary coccidioidomycosis.
Methods: Medical records and skin biopsy slides from 5 patients were retrospectively reviewed. Results: In each patient, edematous papules, nodules, and plaques developed abruptly during the onset of an acute febrile illness. Coccidioidomycosis was confirmed by serology. Skin biopsy specimens revealed interstitial granulomatous dermatitis with neutrophils, leukocytoclasis, and eosinophils. Fungal stains (5/5 cases) and fungal cultures (2/2 cases) revealed no organisms within the skin biopsy specimens.
Conclusion: Interstitial granulomatous dermatitis may be a presenting feature of pulmonary coccidioidomycosis and may possibly represent a reactive manifestation of the infection.
SWEET SYNDROME Sweet Syndrome (Acute Febrile Neutrophilic Dermatosis) Associated With Pulmonary Coccidioidomycosis
David J. DiCaudo, MD ;Karel Jill Ortiz, MD ;Stephanie J. Mengden, MD ;Katherine K. Lim, MD
Arch Dermatol. 2005;141:881-884. Abstract quote Background Sweet syndrome (acute febrile neutrophilic dermatosis) may arise in association with a variety of underlying systemic diseases. Only 1 case of coccidioidomycosis-associated Sweet syndrome has previously been reported.
Observations We describe 2 patients who developed Sweet syndrome during the onset of acute pulmonary coccidioidomycosis. Systemic antifungal therapy was given in both cases. Respiratory symptoms and skin lesions resolved within 5 weeks.
Conclusions Sweet syndrome may be a presenting feature of coccidioidomycosis. Recognition of the underlying pulmonary infection is important so that inappropriate treatment with systemic corticosteroids can be avoided.
LABORATORY/
RADIOLOGIC/
OTHER TESTSCHARACTERIZATION Laboratory Markers CultureLarge sporangia 30-60 um with numerous endospores
GROSS APPEARANCE/
CLINICAL VARIANTSCHARACTERIZATION GENERAL Organisms usually found in foci of suppuration and granulomas
Coccidioidomycosis: a review and update.Department of Dermatology and Pathology, Mayo Clinic, Scottsdale, Arizona 85259, USA.
J Am Acad Dermatol. 2006 Dec;55(6):929-42; quiz 943-5. Abstract quote
Coccidioidomycosis occurs in arid and semi-arid regions of the New World from the western United States to Argentina. Highly endemic areas are present in the southwest United States.
Coccidioides species live in the soil and produce pulmonary infection via airborne arthroconidia. The skin may be involved by dissemination of the infection, or by reactive eruptions, such as a generalized exanthem or erythema nodosum. Interstitial granulomatous dermatitis and Sweet's syndrome have recently been recognized as additional reactive signs of the infection.
Coccidioidomycosis is a "great imitator" with protean manifestations. Cutaneous findings may be helpful clues in the diagnosis of this increasingly important disease.VARIANTS Valley Fever Combination of erythema nodosum, erythema multiforme, arthritis, and episcleritis in the setting of pulmonary infection LUNG DISSEMINATED Occurs more frequently in African Americans, Filippinos, Asian women, and pregnant women in last 2 trimesters CUTANEOUS J Am Acad Dermatol 1981;4:38-46
Pustular, crusted, granulomatous, verrucous plaques and hyperkeratotic nodules
If secondary to dissemination, usually on the face and scalp
Primary infection is usually by primary inoculation presenting as an ulcer or chancre with lymphadenopathy spreading in a sporotrichoid fashion
MUSCULOSKELETAL
Am J Clin Pathol. 2005 Nov;124(5):693-6. Abstract quote
Coccidioidomycosis is a primary pulmonary infection, endemic to the southwestern United States, caused by inhalation of spores in an immunocompetent host. When systemic spread occurs, the dissemination of infection to musculoskeletal sites might account for 20% to 50% of cases. The musculoskeletal manifestations are well recognized by physicians in endemic areas.
We report 2 cases encountered in metropolitan Chicago in which morphologically typical, large, yeast-like, encapsulated, endosporulating organisms were identified in tissue samples and Coccidioides immitis was cultured. One patient had a degenerative-type radiographic picture thought to be related to a sports injury. A second patient with skin lesions and a paraspinal mass required emergency decompressive spinal surgery. A history consistent with exposure to Coccidioides organisms was apparent only for the first patient. Although the diagnosis can be established morphologically by identifying the large endospores in tissue samples, the submission of samples for culture and subsequent microbiologic confirmation requires the diagnosis to be considered clinically.
This report emphasizes the rarity of the organism in nonendemic areas and the redundant value of using both morphologic and microbiologic modalities.
HISTOPATHOLOGY CHARACTERIZATION GENERAL
Arch Pathol Lab Med. 2006 Jan;130(1):97-100. Abstract quote
Coccidioidomycosis is an endemic infection acquired by inhalation of the spores (arthroconidia) of the thermally dimorphic fungus, Coccidioides immitis. The arthroconidia transform into spherical cells called mature spherules in the lung. Immature spherules and other atypical forms of immature C immitis have rarely been found in vivo.
We report on a case that presented unusual forms of immature sporulating C immitis in a fine-needle aspiration specimen. A 36-year-old Chinese woman, living in New Jersey for the past 10 years, presented with fever, night sweats, hemoptysis, and an abnormal chest radiograph approximately 9 months after a brief vacation trip to the Grand Canyon in Arizona. She was treated with antibiotics for 4 weeks without improvement. Subsequent chest computed tomography showed a 3-cm cavitary lesion in the right lower lobe of the lung.
Fine-needle aspiration biopsy revealed diverse morphologic forms of a fungus that was confirmed by culture as immature sporulating C immitis.
SPECIAL STAINS/
IMMUNOPEROXIDASE/
OTHERCHARACTERIZATION Special stains GMS strongly positive
PAS weakly positive
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Rosai J. Ackerman's Surgical Pathology. Ninth Edition. Mosby 2004.
Sternberg S. Diagnostic Surgical Pathology. Fourth Edition. Lipincott Williams and Wilkins 2004.
Robbins Pathologic Basis of Disease. Seventh Edition. WB Saunders 2005.
DeMay RM. The Art and Science of Cytopathology. Volume 1 and 2. ASCP Press. 1996.
Weedon D. Weedon's Skin Pathology Second Edition. Churchill Livingstone. 2002
Fitzpatrick's Dermatology in General Medicine. 6th Edition. McGraw-Hill. 2003.
Weiss SW and Goldblum JR. Enzinger and Weiss's Soft Tissue Tumors. Fourth Edition. Mosby 2001.
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