Histopathology of pigment dispersion syndrome and glaucoma: A Case Report.

Pigment dispersion syndrome (PDS) can have varied manifestations. Anterior and posterior segment involvement by dispersed pigments was documented in gross pathology and by staining under microscopy. Pigmentary changes in the sclera, cornea, anterior chamber, iris, trabecular meshwork, lens, and retinal pigment epithelium and optic nerve findings were consistent with PDS.

Idiopathic inflammatory diseases of orbit and ocular adnexa: Histopathological and immunochemical analysis.

Purpose: : To present histopathological and immunohistochemical analysis of idiopathic inflammatory diseases of orbit and ocular adnexa.

Methods: Design- A retrospective laboratory-based study. The study was carried out in an ocular pathology laboratory in a tertiary institute of northeast India where analysis of 93 cases was done in 5 years, during the period from 2011 to 2016.

Long-term outcomes of labial mucosal graft in conjunctivo-rhinostomy surgery.

Objective: To report the long-term outcomes of the conjunctivo-rhinostomy surgery with labial mucosal graft performed for the patients of proximal lacrimal drainage system disorders.

Methods: Retrospective, single surgeon (KB), non-comparative study including patients having complete obstruction of the superior and inferior proximal lacrimal drainage system. All patients underwent conjunctivo-rhinostomy with labial mucosal graft insertion.

Study of electronic structure in the L-edge spectroscopy of actinide materials: UO as an example.

While the electronic structure calculation for actinide materials, using ligand-field phenomenology in conjunction with density functional theory (LFDFT) treating configurations with single or two open-shells 5f and 6d electrons, is well established and currently practiced, the consideration of the three open-shells electron configurations for LFDFT treatment is a challenging task addressed in the present work. Herein, we report the first-principles method, developed for the first time on the basis of LFDFT, to evaluate the uranium L-edge X-ray absorption near-edge structure (XANES), which requires non-equivalent active electrons within the 2p, 5f and 6d orbitals of the uranium ion. The theoretical results, when compared with the experimental XANES data measured from uranium dioxide fresh fuel pellets and rector-exposed spent fuel materials, show good agreement with the experimental findings elucidating the local oxidation in the spent fuel materials.

Immunohistochemistry on pattern of ocular & adnexal tumours in a tertiary eye care centre of Northeast India.

Background & Objectives: Ocular and adnexal tumours are important causes of morbidity in India and globally. Immunohistochemistry (IHC) is a vital molecular pathology tool, which helps to diagnose a tumour with more accuracy. The present study was undertaken to document the profile of ocular and adnexal tumour with IHC at a tertiary eye care center in Northeast India.

Cyclophotocoagulation-induced sympathetic ophthalmia in a Coats' disease patient supported by histopathology and immunohistochemistry.

We describe a case of a 13-year-old male patient of Coats' disease who developed sympathetic ophthalmia (SO) following contact diode laser cyclophotocoagulation. There was no history of invasive surgery or any perforating injuries preceding cyclodestructive therapy. The eye had neovascular glaucoma secondary to Coats' disease, which was treated once with contact cyclophotocoagulation.

Single-stage socket reconstruction with vascularised temporalis muscle flap following total orbital exenteration: Description of 3 surgical approaches.

We describe the techniques and outcome of three different approaches to transfer the posterior 2/3 temporalis muscle pedicle flap for orbital socket reconstruction following total orbital exenteration. A retrospective interventional series of 9 patients operated between February of 2000 and 2006. We describe three different techniques, namely supraorbital, transorbital and transorbitectomy approach.

IgG4-related intraocular inflammation masquerading as ciliary body melanoma in a young girl.

Immunoglobulin G4 (IgG4-related diseases) affects various tissues and organs of the human body. Orbital, adnexal, and scleral inflammations were already reported in the medical literature. To the best of our knowledge, we report the first case of intraocular IgG4-associated inflammatory mass in the ciliary body mimicking as a melanoma in a 23-year-old female from Northeast India.

Core electron excitations in U(4+): modelling of the nd(10)5f(2)→nd(9)5f(3) transitions with n = 3, 4 and 5 by ligand field tools and density functional theory.

Ligand field density functional theory (LFDFT) calculations have been used to model the uranium M4,5, N4,5 and O4,5-edge X-ray absorption near edge structure (XANES) in UO2, characterized by the promotion of one electron from the core and the semi-core 3d, 4d and 5d orbitals of U(4+) to the valence 5f. The model describes the procedure to resolve non-empirically the multiplet energy levels originating from the two-open-shell system with d and f electrons and to calculate the oscillator strengths corresponding to the dipole allowed d(10)f(2)→ d(9)f(3) transitions appropriate to represent the d electron excitation process. In the first step, the energy and UO2 unit-cell volume corresponding to the minimum structures are determined using the Hubbard model (DFT+U) approach.

Profile of ocular and adnexal tumours at a tertiary institute of northeast India.

Purpose: To present the profile of patients with ocular and adnexal tumours presenting at a tertiary eye care institute in northeast India in ten years between 2003 and 2013.

Design: Hospital based retrospective review of medical records.

Method: The clinical history, site of involvement and pathological diagnoses were retrieved from ocular pathology registers from October 2003-October 2013.

Microbeam x-ray absorption spectroscopy study of chromium in large-grain uranium dioxide fuel.

Synchrotron-based microprobe x-ray absorption spectroscopy (XAS) has been used to study the local atomic structure of chromium in chromia-doped uranium dioxide (UO2) grains. The specimens investigated were a commercial grade chromia-doped UO2 fresh fuel pellet, and materials from a spent fuel pellet of the same batch, irradiated with an average burnup of ~40 MW d kg(-1). Uranium L3-edge and chromium K-edge XAS have been measured, and the structural environments of central uranium and chromium atoms have been elucidated.

Comparative analysis of use of porous orbital implant with mucus membrane graft and dermis fat graft as a primary procedure in reconstruction of severely contracted socket.

Purpose: The purpose of our study is to present a surgical technique of primary porous orbital ball implantation with overlying mucus membrane graft (MMG) for reconstruction of severely contracted socket and to evaluate prosthesis retention and motility in comparison to dermis fat graft (DFG).

Study Design: Prospective comparative study.

Materials And Methods: A total of 24 patients of severe socket contracture (Grade 2-4 Krishna's classification) were subdivided into two groups, 12 patients in each group.

Primary dermatofibrosarcoma protuberans of orbit--a rare entity.

Primary Dermatofibrosarcoma Protuberance (DFSP) is a rare neoplasm of dermal origin. Though it is a locally aggressive tumor with high recurrence rate, however distant metastasis can also occur. Orbital DFSP is an uncommon phenomenon.

Single stage surgery for Blepharophimosis syndrome.

Purpose: The purpose of this study was to report the functional and cosmetic outcome of single stage surgical procedure for correction of the classic components of Blepharophimosis syndrome.

Materials And Methods: We report a retrospective case file review of 11 patients with Blepharophimosis syndrome operated between July 2004 and April 2008. Each patient had undergone the correction of epicanthus inversus, telecanthus, palpebral phimosis, and bilateral ptosis as a single-stage surgical procedure.

A rare case of adult onset retinoblastoma.

Retinoblastoma usually manifests before five years of age. Retinoblastoma in an adult is extremely rare. Twenty-three cases of retinoblastoma in adults 20 years or older have been reported in world literature.

An unusual case of retrobulbar arachnoid cyst and its management.

Arachnoid cysts are collection of cerebrospinal fluid contained inside a cavity lined by leptomeninges. It constitutes 1% of all intracranial tumours mostly present in the middle cranial fossa. Retrobulbar arachnoid cyst in elderly persons are a rare occurrence.

Primary primitive neuroectodermal tumor of the orbit.

Primitive neuroectodermal tumor (PNET) is a small round cell malignant tumor of neuroectodermal origin. Most of the PNETs occur in the central nervous system (CNS). PNETs recognized outside of CNS are diagnosed as peripheral PNET (pPNET).

Bacteriology of chronic dacryocystitis in adult population of northeast India.

Purpose: To determine the pattern of bacteriology of chronic dacryocystitis in the Northeast Indian population and compare it with previous studies.

Methods: A prospective analysis of 543 lacrimal sac content of 421 patients in the period of October 2003 to June 2007. Material obtained directly from the lacrimal sac during making sac flap that had undergone external dacryocystorhinostomy for chronic dacryocystitis.

Zircaloy-2 secondary phase precipitate analysis by X-ray microspectroscopy.

Secondary phase precipitates of a Zircaloy sample have been characterised by X-ray microspectroscopy. In Zircaloy-2 X-ray microscopy reveals pictures with a 40 nm resolution identifying Fe, Cr and to a lower occurrence Ni phases up to size of the micrometer. Analysis by X-ray spectroscopy defines the structure of specific secondary phase precipitates.

Ocular adnexal lymphoma in the Northeast Indian population.

We present the clinical profile of biopsy and immunohistochemistry-proven ocular adnexal lymphomas in the Northeast Indian population. Nineteen patients between October 2004 and June 2006 with ocular adnexal lymphoma were analyzed retrospectively. Histopathological classification was done according to international working formulation.

Probing atomic migration in nanostructured multilayers: application of X-ray standing wave fields.

X-ray standing wave fields, excited in periodic nanostructured multilayers during Bragg diffraction, have been used to probe atomic migration in multilayers. Ion beam induced migration of Fe impurity atoms from the C layers to the Pt layers in a Pt(Fe)/C(Fe) multilayer, where each layer is about 2 nm thick, has been detected. With a depth resolution better than 0.