<p class="abstract">Rhino-orbital-cerebral mucormycosis is an invasive disease associated with high mortality ranging from 25-62%. There is an increase in the incidence of mucormycosis in post COVID-19 infection patients. We have come across 10 such patients. On retrospective analysis of the patient’s records, we found that 60% patients had received steroids and majority had co-morbidities. All the patients received similar treatment with IV amphotericin B and local debridement and the mortality rate was as high as 44%. We conclude that patients with COVID 19 infection are susceptible to mucormycosis because of impairment of barrier defense, dysfunction phagocytes and lymphocytes and the use of immunosuppressive medications such as steroids and tocilizumab.</p>

Background: To study the demographics and histopathological patterns of oral squamous cell carcinoma (OSCC) reported at a tertiary level referral teaching hospital in Hyderabad, India.

The major efficiency loss of a boiler is caused by the hot stack gases discharging to the atmosphere which is polluting the atmosphere and on other side Pollution Control Board is forcing the norms of Pollution levels in atmosphere. One of the most cost-effective ways of improving the efficiency of a high pressure steam boiler is to install an economizer on the boiler. An economizer is a heat exchanger, which transfers heat from the stack gases to the incoming feedwater. Typically, on a high pressure water tube boiler, the efficiency improvement with an economizer is 2 to 4%, depending on firing rate. On a high pressure fire tube boiler, the improvement is 2 to 3.5%, depending on boiler size and firing rate. The economizers are located in the boiler stack close to the stack gas outlet of the boiler. They may be supported from overhead or from the floor. A feedwater line, which serves the boiler, is piped to the unit. No additional feedwater control valves or stack gas dampers are required. Presently in NTPC stage II units there are banks of tubes in economizer. There was a proposal from management to add another bank of tubes in the economizer so that there will be control of pollutants coming out from boiler. We took that proposal as a task and made a detailed investigation of it. An investigation is conducted on the effect of performance of the boiler by incorporating the additional bank of tubes in the space below the lower bank of tubes. The main idea is to extract maximum amount of heat from the flue gases and increase the heat pick up rate of the feed water outlet into the boiler. By assuming the additional bank of tubes, various heat transfer calculations are done and the reduction in the flue gas out let temperature and increase in the feedwater outlet temperature are found out. Finally a comparison of efficiencies of the boiler is made between the existing unit and the unit when additional bank of tubes are assumed. At last, various pros and cons have been found out by conducting above investigation i.e. by incorporating additional bank of tubes in the economizer.

HighlightsSalivary duct carcinoma is a rare aggressive tumor.Current case showed recurrence free 40 months follow up.HER2/neu negativity in this case might have significance regarding recurrence free survival.

<p>Malignant peripheral nerve sheath tumor (MPNST) refers to spindle cell sarcomas arising from or separating in the direction of cells of the peripheral nerve sheath. The MPNST of the parotid gland is an extremely rare tumor, accounts for &lt;5% of all soft tissue sarcomas, and carries a poor prognosis. Diagnosis of MPNSTs is usually based on histopathology aided by IHC, which reflects the Schwann cell differentiation in this neoplasm. Approximately 50-90% of MPNSTs are positive for S-100 protein. A 56-year-old male presented with right parotid swelling for 3 months and incomplete right eye closure. The patient was diagnosed with neurofibromatosis 1 (NF-1) and pulmonary tuberculosis in the past. On Examination, a hard, tender swelling measuring 5×4 cm involving the right parotid gland and right grade 2 LMN facial palsy was noted. Histopathology was suggestive of a MPNST.</p><p><strong> </strong></p>