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VIII.
Rinosporidiosis
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Case 51:
Rinosporidiosis / Papilloma
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Rinosporidiosis
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Papilloma
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Fig.51-A1
Rhinosporidiosis
In this case a tumor-like swelling is found in the conjunctiva.
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Fig.51-B1
Papilloma
A 40 years old busseman from Mérida Venezuela shows a small tumor of the inferior lid which did grow slowly.
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Fig.51-A2
Rhinosporidiosis
Histologically in the HE stain of the resected tumor a sporangium and several trophic cells of the fungus can be observed. A trophic cell shows a central nucleus. With this magnification the typical structures of the endospores in the sporangium with their internal corpuscles can not be seen. They are easily recognized in the fig. 51-A3.
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Fig.51-B2
Papilloma
Histologically a benign papilloma has been found.
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Fig.51-A3
Rhinosporidiosis
With high power the endpspores in the sporangia show the typical internal bodies. HE stain.
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Fig.51-B3
Papilloma
The slide of this case was sent to us from India for consultation. It was thought that the large cyst with endospore-like bodies could be a sporangium of Rhinosporidium seeberi in the case of a perianal fungus infection. Cases of this kind have been published in the literature. Apparently no sporangium is present, because the internal bodies of this cyst-like structure do not show the typical endospores as shown in one of our pictures. This means that in this case no Rhinosporidiosis with an anusual localization can be diagnosed.
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Fig.51-A4
Rhinosporidiosis
A singular large fungus cell of the trophic form with a central nucleus is an immature cell of R. seeberi. The mature form, the sporangium, the other type, the cyst-like one, with numerous endospores will be shown in the fig. 51-A3.
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Fig.51-A5
Rhinosporidiosis
Under high power the ruptured membrane in the periphery of the sporangium can be observed with the endospores leaving the large cyst-like cell.
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