mozhgan rezaie kanavi

To report a rare case of orbital angioleiomyoma (ALM) and its management.

A 22‑year‑old woman presented with slowly progressive painless axial proptosis. Computed tomography and magnetic resonance imaging demonstrated a well‑defined intraconal mass that was isointense in T1 and hyperintense in T2 weighted images, heterogeneously enhanced by gadolinium.

The tumor, despite having significant adhesions to surrounding tissues and noticeable hemorrhage, was excised completely via the lateral orbitotomy approach. Histopathologic analysis of the specimen was consistent with an orbital ALM. The patient recovered from the operation uneventfully.

ALM must be considered in the differential diagnoses of orbital tumors

Degradation of human retinal pigment epithelium (hRPE) during some disorders such as aging is associated with severe impairment of ocular optical receptor function. Cellular and tissue transplantation of RPE layer is one of the treatment options that has been considered in recent years. The use of platelet gel has shown beneficial effects on the growth of various cultured cells.This study was conducted to investigate the effects of three different concentrations of platelet gel on the viability and the expression of PAX6 and RPE65 genes of cultivated RPE cells.

hRPE cells extracted from the human eye were cultured in plates containing platelet gel (PL) of different concentrations (10%, 20%, and 30%). Cells viability was tested by MTT test and the expression RPE65 and PAX6 genes were analyzed by using real time PCR. The number of expression changes of each gene in different treatments compared to the control and according to the internal GAPDH gene was calculated according to the 2-∆∆Ct method and the results were compared with each other in a bar chart.

After 7 days, cultivated hRPE cells in culture media containing 30% PL showed a high rate of viability in comparison with those cultured in 10% PL (p < 0.05). RPE65 gene expressions in cell cultures treated with 20% and 30% PL were higher than controls (p < 0.05). However, there was no significant difference in the expression of PAX6 gene between the cell cultures treated with 20% and 30% platelet gels.

our results showed that using platelet gels in hRPE cell cultures can improve cell viability and identity, which can be promising for optimizing future clinical cell therapy strategies.

To evaluate stem cell deficiency using impression cytology (IC) in patients with chronic and delayed-onset mustard gas keratopathy (MGK). A consecutive series of patients with MGK underwent IC. Thirty-five eyes of 18 patients (all male) with mustard gas keratopathy were included in this observational case series. Presence of goblet cells on the corneal side of specimens was considered to indicate stem cell deficiency. Corneal involvement was graded as mild, moderate and severe. Relation between IC findings and clinical grading was evaluated. There was limbal stem cell deficiency in at least one quadrant of the cornea in all 35 eyes (100% of cases). No differences was found between impression cytology findings (positive versus negative for corneal goblet cells) among different quadrants (p= 0.378). Clinical grading was the same between nasal and temporal quadrants (P=0.266) and between superior and inferior quadrants (P= 0.263). Combining the superior and inferior quadrants (vertical zone) and also the nasal and temporal quadrants (horizontal zone) together, clinical grading was more severe in horizontal versus vertical zones (p< 0.001). There was no correlation between stem cell deficiency and clinical corneal severity (p=0.893). Varying degrees of stem cell deficiency was demonstrated in all patients with chronic or delayed-onset MGK using IC. Clinical corneal manifestations are more severe in nasal and temporal quadrants. We found no correlation between stem cell deficiency and clinical manifestations. Other factors such as perilimbal conjunctival ischemia might play a role.

To evaluate the safety of different doses of intravitreal bevacizumab in rabbit eyes. Twelve eyes of 6 rabbits underwent intravitreal injection of 5, 7.5 and 10 mg of bevacizumab. In each rabbit, one eye was considered for bevacizumab injection and the fellow eye served for either placebo injection or observation. All eyes were examined before and 1, 2, 3, 7, 14 and 28 days after intravitreal injections. Electroretinography (ERG) was performed before and 14 days after the injections. 28 days after the injections, all eyes were enucleated and examined with light and electron microscopy. In the clinical examination, significant vitritis was observed in one of the 10 mg injected eyes from first post-injection which was eliminated by the 7th day. Cataract was seen in the same eye. Post-injection ERGs showed no significant changes. Increase in Muller-like cells was observed in the histological examination in the injected eyes. Intravitreal injection of 5 and 7.5 mg doses of bevacizumab was safe in rabbit eyes; however, the 10 mg dose was associated with intraocular inflammation.