Fig.56-A1
Schizomycetoma

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.

Fig.56-A2
Schizomycetoma

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.

Fig.56-A3
Schizomycetoma

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.

Fig.56-A4
Schizomycetoma

Here the grains are GMS positive and consist of staphylococci.

Fig.56-A5
Schizomycetoma

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.