[An increase of plasma cells in the regenerated mucous membrane of maxillary sinus. Experimental study]. / Aumento de células plasmáticas en la mucosa regenerada del seno maxilar. Estudio experimental.

In ten albino New Zealand rabbits we studied in the regenerated mucosa of the maxillary sinus what happens after three months of radical removal of sinus mucosa. The study was realized by light and electronic microscopy, with special attention to the plasma cells around the submucosal glands. There is an increased of plasma cells, in a proportion of 10:1.

[Histochemical study with lectins in nasal polyposis]. / Estudio histoquímico con lectinas de las células plasmáticas en la poliposis nasal.

Histochemical study done with lectins is useful in order to differentiate between several carbohydrates from glycoproteins and glycolipides present in cellular membranes. Plasma cells and eosinophils are very frequent findings in nose mucous of patients with nasal polyposis. Histochemistry with lectins of plasma cells show a reactivity of the cellular cytoplasma to ConA while the external cellular membrane stains with PNA.

[Eosinophils in nasal mucosa of patients with nasal polyps: preliminary histochemical study]. / Los eosinófilos en la mucosa nasal de pacientes con poliposis nasal: estudio histoquímico preliminar mediante lectinas.

Glycoproteins and glycolipids play an important role in cellular biological specificity. The use of lectins as histochemical probes may be useful in studying the nasal mucosa. Eosinophils are a common finding in the nasal mucosa of patients with nasal polyposis. Histocytochemistry of eosinophils in the nasal mucosa of such patients revealed reactivity to all lectins used in this study except LTA. This suggests that alpha-L-fucose was not present in the eosinophils of the nasal mucosa of patients with nasal polyposis and asthma.

Submucosal glands after maxillary sinus surgery. An experimental study in rabbits.

Thirty New Zealand White rabbits underwent unilateral partial or complete removal of maxillary sinus mucosa in order to evaluate submucosal maxillary sinus glands. After three months, specimens were taken for examination from all operated on and control sinuses. Bacteriological cultures, light and electron microscopy were performed. Histopathological findings showed a decrease in the number of serous glands and significant inflammation was present in the sinus in which there was complete surgical removal. Electron microscopy revealed changes in the secretory cells of the serous glands in the regenerated post-surgical mucosa.

Radical or partial maxillary sinus surgery: a dilemma today? An experimental study.

To evaluate partial or radical surgical removal of the maxillary sinus mucosa, 20 New-Zealand albino rabbits were used. After three months, specimens were taken for examination. Bacteriological cultures, light- and electron microscopy were performed, and mucociliary transport was studied. These experimental findings add further support to the concept of performing a conservative sinus procedure rather than a radical removal as a first procedure.

[Basal and non-hair cells in the regenerated mucosa of the maxillary sinus]. / Células basales y no ciliadas en la mucosa regenerada del seno maxilar. Estudio experimental.

In 10 albino New Zealand rabbits, a study was made of the regeneration of the hair cells in the maxillary sinus mucosa three months after removing the sinus mucosa. Using optical microscopy and transmission and scanning electron microscopy, basal and non-hair cells were studied as the probable origin of hair cells. The regenerated sinus mucosa showed areas of epithelium consisting only of a basement membrane and a layer of basal cells. Ultrastructurally, two types of basal cell were visible in the regenerated mucosa. The proportion of non-hair cells was greater than in normal mucosa.

[Secondary hearing impairment due to Paget's disease]. / Hipoacusia secundaria a enfermedad de Paget.

Paget's disease presents frequently in skull bones with incidence in temporal bone, causing vertigo, hearing loss and tinnitus. The AA. present one case in a woman, 60-year-old, diagnosed as Paget's disease, complaining of left ear deafness and hearing impairment of the right ear resulting from a conductive disorder.