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Breast-nonmalignant

Parasites

Myiasis

 

Reviewer: Hind Nassar, M.D. in January 2009 (see Authors page)

Revised: 1 October 2012, last major updated March 2010

Copyright: (c) 2002-2010, PathologyOutlines.com, Inc.

 

Definition

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● Infestation of body by larva of Diptera (flies with 2 wings)

● Larvae usually occupy skin and subcutis, but potentially any organ

 

Terminology

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Epidemiology

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Dermatobia hominis (human botfly) is obligate Diptera that needs to feed on a host to complete its development

● Indigenous to Central and South America, occasionally reported in USA (Radiology 2001;218:517)

Cordylobia anthropophaga (Tumbu fly) is endemic in Nigeria (BMC Surg 2004;4:5)

 

Etiology

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Clinical features

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● Cause abscess and rarely granulomatous response to dead larvae

● Often multiple infestations in breast

● Also affects lips of breast fed infants (Int J Dermatol 2006;45:1069)

 

Prognostic factors

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Case reports

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● 54 year old woman with breast mass due to chronic granulomatous response to botfly (Archives 1999;123:829)

 

Treatment

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Clinical images

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††††††††††††††† †††††††††††††††††††††††††††††††

Breast infested by††††††††††††† Extracted Tumbu fly larvae††††††††††††† Human botfly larvae

Tumbu fly larvae†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† extracted from a dog

 

 

Gross description (Macroscopy)

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Gross images

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Micro description (Histopathology)

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● Chronic granulomatous response, dead larvae

 

Micro images

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†††††††††††††††††††††††††††††††††††††††††††††††

Botfly - respiratory spiracles††††††††††††††††††††††††† Granulomatous response around a spine

 

Drawings

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Virtual Slides

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Videos

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Cytology description

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Cytology images

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Positive stains

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Negative stains

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Electron microscopy descriptions

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Electron microscopy images

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Molecular / cytogenetics description

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Molecular / cytogenetics images

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Differential Diagnosis

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● Ticks: have legs and mouth and donít burrow deeply into skin

Tunga penetrans: flea with legs, almost always involves feet, has cuticle > 20 microns, lacks a spine

 

Additional references

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End of Breast-nonmalignant > Parasites > Myiasis

 

 

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