Begin  The Authors

Tropical Diseases:

I Leishmaniasis
II Paracoccidioidomycosis
III Blastomycocis
IV Chromoblastomycosis
V Lepra
VI Sporotrichosis
VII Histoplasmosis
VIII Rhinosporidiosis
IX Mycetomas
X Rhinoscleroma
XI Chagasdisease
XII Actinomycosis
XIII Mucormycosis
XIV Amoebiasis
XV Protothecosis
XVI Lobomycosis
XVII Phaeohyphomycosis
XVIII Pruritus actinicus
XIX Bite of snake
XX Coccidioidomycosis

 List of cases


IX. Mycetomas

Case 56: Schizomycetoma / Carcinoma

Previus Case 55

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Next Case 57



Click here to see the picture 56-A1

A farmer from the environs of the town Mérida/ Venezuela is presenting on his left elbow an extensive, ulcerated, clearly limited tumor tissue extending to the forearm. In the peripherical parts of the tumor haemorrhages are seen.

Click here to see the picture 56-B1

In the another patient from the Venezuelan Andes an ulcerated bleeding tumor was found on the back of his hand between the thumb and the forefinger. The tumor is smaller but has a certain similarity to the schixomycetoma of fig. 56-A1.

Click here to see the picture 56-A2

The slide of the biopsy was stained with HE and showed a non-specific inflammation with abscesses containing grains of a blue colour and irregularly formed.

Click here to see the picture 56-B2

Histologically a slightly cornified squamous cell carcinoma was diagnosed.

Click here to see the picture 56-A3

In another place a grain under higher magnification is markedly haematoxylin-positive and presents puntiform structures, i. e. bacteria forming the grain. As mentioned above the term grain and mycetoma earlier was used only for grains and mycetomas formed by fungi.

Click here to see the picture 56-A4

Here the grains are GMS positive and consist of staphylococci.

Click here to see the picture 56-A5

The GMS positive gr ains in this case are formed partly very irregularly. They were named earlier botryomycotic structures. Nowadays, however, they are called grains or schizomycetomas. "Schizo" refered to the partition of bacteria.

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Facultad de Medicina
Universidad de Los Andes
Merida - Venezuela