A rare case of recurrent isolated eyelid myxoma: Case report and review of literature.

Myxoma, a benign mesenchymal tumour, can rarely present as an isolated eyelid swelling. A 33-year-old male presented with a progressively increasing swelling in the temporal part of the right upper eyelid of 5-month duration. The patient was misdiagnosed as chalazion and underwent incision and curettage locally. Subsequently, the patient presented with recurrence of the swelling and was treated with excision of the lesion. Histopathology showed the presence of spindle- to stellate-shaped cells in a myxoid matrix. Alcian blue stain was positive for mucin. The systemic evaluation did not show any components of Carney's complex. It is important to be aware of this entity of cutaneous eyelid myxoma as a rare cause of eyelid swelling and its propensity to recur rapidly after incomplete excision.

Lacrimal Intrasaccal Polyp With Inspissated Mucopeptide Concretions.

Lacrimal sac mucopeptide concretions are not uncommon and usually identified following the lacrimal sac marsupialization during a dacryocystorhinostomy. A 39-year-old female presented with epiphora and discharge of 8 months duration and was diagnosed as primary acquired nasolacrimal duct obstruction. During the endoscopic dacryocystorhinostomy, a large intrasaccal polyp arising from the posterosuperior wall of the lacrimal sac with multiple inspissated mucopeptide concretions was noted. The lesion was excised, and the mucopeptide concretions were removed. Histopathology was suggestive of an intrasaccal polypoidal granuloma. To the best of the authors' knowledge, this is the first report of an intrasaccal polyp-like lesion secondary to a granulomatous response to a lacrimal sac mucopeptide concretion. It is important to be aware of this entity. The retrieval of mucopeptide concretion or lacrimal sac dacryoliths should prompt the surgeon to initiate an intraoperative endoscopic assessment of the sac before proceeding with the surgery.

Characterization of human serum immunoglobulin g modified with singlet oxygen.

Reactive oxygen species, as singlet oxygen ((1)O2), is continuously being generated by aerobic organisms, and react actively with biomolecules. At excessive amounts, (1)O2 induces oxidative stress and shows carcinogenic and toxic effects due to oxidation of lipids, proteins and nucleic acids. In our study, immunoglobulin G (IgG) was modified by (1)O2 generated by the ultraviolet (UV) irradiation of methylene blue. The modified IgG was characterized by UV spectroscopy, carbonyl content determination, thermal denaturation and electrophoretic study. Oxidation induced by modification of IgG by (1)O2 also analyzed by scavenging studies. It was found that ultraviolet absorption spectra of modified IgG shows marked hyperchromicity. The carbonyl content was found to be high in modified IgG as compared to native IgG which confirms its oxidation. Thermal denaturation of modified protein sample shows decrease in Tm value by 3 °C and less intensity banding pattern on polyacrylamide gel electrophoresis. The quenching effect of sodium azide provides clue for modification of IgG by methylene blue, as it is known (1)O2 scavenger. Hence, the IgG modified with (1)O2 may be one of the etiological pathogenic factors for rheumatoid arthritis and diabetes.