Exploring the Sensing Potential of g-C3N4 versus Li/g-C3N4 Nanoflakes toward Hazardous Organic Volatiles: A DFT Simulation Study.

Ab initio calculations were performed to determine the sensing behavior of g-C3N4 and Li metal-doped g-C3N4 (Li/g-C3N4) quantum dots toward toxic compounds acetamide (AA), benzamide (BA), and their thio-analogues, namely, thioacetamide (TAA) and thiobenzamide (TAA). For optimization and interaction energies, the ωB97XD/6-31G(d,p) level of theory was used. Interaction energies (Eint) illustrate the high thermodynamic stabilities of the designed complexes due to the presence of the noncovalent interactions. The presence of electrostatic forces in some complexes is also observed. The observed trend of Eint in g-C3N4 complexes was BA > TAA > AA > TBA, while in Li/g-C3N4, the trend was BA > AA > TBA > TAA. The electronic properties were studied by frontier molecular orbital (FMO) and natural bond orbital analyses. According to FMO, lithium metal doping greatly enhanced the conductivity of the complexes by generating new HOMOs near the Fermi level. A significant amount of charge transfer was also observed in complexes, reflecting the increase in charge conductivity. NCI and QTAIM analyses evidenced the presence of significant noncovalent dispersion and electrostatic forces in Li/g-C3N4 and respective complexes. Charge decomposition analysis gave an idea of the transfer of charge density between quantum dots and analytes. Finally, TD-DFT explained the optical behavior of the reported complexes. The findings of this study suggested that both bare g-C3N4 and Li/g-C3N4 can effectively be used as atmospheric sensors having excellent adsorbing properties toward toxic analytes.

Use of Optical Coherence Tomography in Dentistry.

Optical coherence tomography (OCT) is an optics-based imaging technique, which may be called an "optical biopsy." It can be used to acquire structural information about a tissue at a resolution comparable to histopathology. OCT is based on the principle of low-coherence interferometry where near-infrared (NIR) light is shown on a tissue sample and then cross-sectional images are obtained based on backscattered light and echo time delay. Two main types of OCT are characterized as time-domain OCT (TD-OCT) and Fourier-domain OCT (FD-OCT). The applications of OCT in dentistry can be broadly divided into two groups, i.e., assessment of pathologies and assessment of surfaces and interfaces. Lately, OCT has made its transition from experimental laboratories to mainstream clinical applications. Starting from the short-term training courses, clinicians working in specialities like oral pathology, oral medicine, and oral implantology may find it a useful tool for their practices. It is now clear that OCT will be considered a gold standard diagnostic tool for the detection and characterization of several conditions and lesions of the orofacial region. However, the next challenge will be to incorporate it into the undergraduate and postgraduate curriculum and train dental healthcare staff in the use of these devices.

Clinical outcomes of prestripped, prestained, and preloaded Descemet's membrane endothelial keratoplasty ("P3 DMEK").

PURPOSE: Despite faster healing and reduced risk of rejection, some surgeons are hesitant to adopt Descemet membrane endothelial keratoplasty (DMEK) due to difficult intraoperative tissue preparation. Use of eye bank prestripped, prestained, and preloaded (p3) DMEK tissue can reduce the learning curve and risk of complications. MATERIALS AND METHODS: We conducted a prospective study including 167 eyes undergoing p3 DMEK and compared outcomes to a retrospective chart review of 201 eyes that underwent standard DMEK surgery. The primary outcomes were graft failure, detachment, and re-bubbling frequency. The secondary outcomes included baseline and postoperative visual acuity at months 1, 3, 6, and 12. Baseline and postoperative central corneal thickness (CCT) and endothelial cell counts (ECC) were collected. RESULTS: ECC decrease for p3 DMEK at 3, 6, and 12 months were 15.0%, 18.0%, and 21.0%, respectively. Forty (24%) of p3 DMEK and 72 (35.8%) of standard DMEK eyes had at least a partial graft detachment. There was no difference in CCT, graft failures, or re-bubble frequency. At 6 months, mean visual acuity was 20/26 and 20/24 for standard and p3 DMEK, respectively. Mean case time for p3 DMEK with phaco or p3 DMEK alone was 33 and 24 min, respectively. Mean case time for eyes undergoing DMEK with phaco or DMEK alone was 59 and 45 min, respectively. CONCLUSION: P3 DMEK tissue is safe and can provide excellent clinical outcomes that are comparable to standard DMEK tissue. Eyes undergoing p3 DMEK may have lower graft detachment and ECC loss.

Acute Calcific Band Keratopathy as an Adverse Effect of Recombinant Human Nerve Growth Factor (Cenegermin): A Multicenter Case Series.

PURPOSE: Cenegermin, (OXERVATE) a recently Food and Drug Administration-approved topical formulation of recombinant human nerve growth factor, has been used for the treatment of neurotrophic keratopathy (NK). Corneal deposits have been previously reported as a potential adverse effect; however, the clinical characteristics, visual significance, and treatment options have not been fully described. The purpose of this article is to better characterize corneal deposits occurring during treatment with cenegermin for neurotrophic keratopathy. METHODS: This was a retrospective, multicenter consecutive case series. RESULTS: We identified 5 patients from 3 institutions who developed a white opacity in varying layers of the cornea, consistent with calcium deposition, during treatment with cenegermin. In all cases, the opacity occurred rapidly over the course of a few weeks after initiation of treatment. Histopathologic examination of the cornea from one corneal patient demonstrated extensive calcification of the stroma extending to 90% depth. Before treatment, all patients had stage 2 or 3 NK (Mackie classification). The deposits were visually significant in all patients and did not resolve after cessation of cenegermin. There were no differences in age, sex, etiology of the NK, corneal transplant status, or concurrent medications between the patients who developed a deposit and 15 other patients with stage 2 or 3 NK who did not. One patient was successfully treated with superficial keratectomy with ethylenediaminetetraacetic acid chelation, one patient underwent penetrating keratoplasty, and one patient received a Boston keratoprosthesis. CONCLUSIONS: We report the rapid onset of a corneal opacity after initiation of treatment with cenegermin in patients with stage 2 or 3 NK, consistent with acute calcific band keratopathy. This visually significant adverse finding has not previously been described. We could not identify any risk factors for development. We recommend close monitoring of patients receiving cenegermin therapy because the opacity may be irreversible and may require keratoplasty for visual rehabilitation.

Incidence and Mortality Rate of Perioperative Reintubation: Case Series of 196 Patients.

Among anesthesia-related life-threatening complications, respiratory failure requiring reintubation is common. However, studies evaluating patient characteristics for extubation failure are scarce in the literature. Such knowledge is important to increase awareness and for the development of strategies to improve the safety of anesthesia care. We retrospectively reviewed 196 cases that were reported to our quality assurance (QA) committee from 2004 to 2014 at 3 hospitals. The reintubation rate was 0.09% (n=196). More reintubations occurred in the operating room than the postanesthesia care unit (58% vs 30%). Ninety-three reintubated patients (47%) were 65 years or older. Most patients were in ASA class 3 or 4 (76%) and had a surgical procedure lasting longer than 3 hours. Eleven reintubated patients (5%) died during the hospital course. The exact causes of reintubation could not be determined because of limited data in our QA database. We conclude that although the individual risk of reintubation for each patient is low, the reintubated patients have a higher mortality rate. The study findings emphasize the need for extra vigilance before anesthesia providers attempt extubation of a patient who is elderly, underwent surgery over 3 hours, has chronic obstructive airway disease, or has ASA class 3 or 4 status.

Metastatic Uterine Carcinosarcoma to the Orbit.

Metastases of solid tumors to the eye and ocular adnexa are rare. Herein, the authors describe the clinical, histologic, and immunohistochemical findings of a patient with a history of adenocarcinoma of the colon and a uterine carcinosarcoma (malignant mixed Müllerian tumor) who presented with proptosis and decreased vision. Positive staining with PAX-8, p16 and negative reaction for CK20 and CDX2 helped to establish the uterine origin of the metastasis. This rare case demonstrates the utility of immunohistochemical probes, especially in patients with a complex oncological history, where multiple primary sources of the metastasis are in the differential diagnosis.

Early postoperative outcomes of diverting loop ileostomy closure surgery following laparoscopic versus open colorectal surgery.

BACKGROUND: Although diverting loop ileostomy (DLI) formation reduces the consequences of anastomotic leak and may also decrease the incidence of this severe complication, DLI closure can result in significant complications. The laparoscopic approach in colorectal surgery has numerous benefits, including reduced length of stay (LOS), less wound infection, and better cosmesis. The aim of this study was to determine whether a laparoscopic approach at the time of the ileostomy creation has a beneficial effect on the outcomes of ileostomy closure. METHODS: A retrospective analysis of an IRB-approved prospective database was performed for all patients who underwent DLI closure between 2010 and 2017. Patients' demographics, operative reports, and postoperative course were reviewed. Statistical analyses were performed using SPSS software and included descriptive statistics, Chi-square for categorical variables, and Student's t tests for continuous variables. Skewed variables were compared using the non-parametric Mann-Whitney U test. Regression analysis for overall complications and LOS were preformed to further assess the impact of laparoscopy. RESULTS: We identified 795 patients (363 females) who underwent DLI reversal surgery. The surgical approach in the index operation was laparoscopy in 65% of patients. Conversion to laparotomy at the ileostomy closure occurred in 6.1% of patients. The overall complication rate was lower and the LOS was shorter for patients who underwent DLI closure following laparoscopic surgery. Laparoscopy at the index operation was also associated with a lower incidence of postoperative ileus and a lower estimated blood loss (EBL) at the time of DLI reversal. Multivariate regression analysis found laparoscopy to have significant benefits compared to laparotomy for overall complications and for LOS. CONCLUSION: Ileostomy closure following laparoscopic colorectal surgery offers benefits including reductions in LOS and overall complications.

Multivariate Prediction of Intraoperative Abandonment of Ileal Pouch Anal Anastomosis.

BACKGROUND: Restorative total proctocolectomy with IPAA may not be feasible in some patients because of technical intraoperative limitations. OBJECTIVE: This study aimed to assess preoperative predictors for intraoperative IPAA and review management. DESIGN: This is a retrospective review. SETTING: This study was conducted at Cleveland Clinic between January 2010 and May 2018. PATIENTS: Patients ≥18 years of age who underwent ileoanal pouch surgery were included. Patients with successful pouch creation as planned were grouped as "successful IPAA creation." Operative reports of patients who underwent alternative procedures were reviewed to identify cases when the pouch was preoperatively planned but intraoperatively abandoned (IPAA-abandoned group). Multivariate logistic regression models were developed to determine predictors of intraoperative pouch abandonment. We also reviewed the management of patients in whom the initial pouch creation failed. MAIN OUTCOME MEASURES: The primary outcomes measured were preoperative predictors for intraoperative ileoanal pouch abandonment. RESULTS: A total of 1438 patients were offered an ileoanal pouch; 21 (1.5%) experienced pouch abandonment due to inadequate reach (n = 17) and other technical reasons (n = 4). These patients underwent alternative procedures such as end or loop ileostomy with/without proctectomy. Multivariate logistic regression analysis indicated male sex (OR, 6.021; 95% CI, 1.540-23.534), BMI (OR, 1.217; 95% CI, 1.114-1.329), and a 2-stage procedure (OR, 14.510; 95% CI, 4.123-51.064) as independent factors associated with intraoperative abandonment of pouch creation. Alternative procedures were total proctocolectomy with end ileostomy (n = 14) and total abdominal colectomy with end ileostomy without proctectomy (n = 7). Ultimately, pouch creation was achieved in 6 of 21 patients after a median interval of 8.8 (range, 4.1-34.8) months. All patients had intentional weight loss before a reattempt and total abdominal colectomy with end ileostomy without proctectomy as their initial procedure. LIMITATIONS: This study was limited by its retrospective nature. CONCLUSIONS: Ileoanal pouch abandonment is rare and can be mitigated by initial total abdominal colectomy and weight loss. Male, obese patients are at a higher risk of failure. Intraoperative assessment of ileoanal pouch feasibility should occur before rectal dissection. See Video Abstract at http://links.lww.com/DCR/B156. PREDICCIÓN MULTIVARIANTE DEL ABANDONO INTRAOPERATORIO DE LA ANASTOMOSIS ANAL CON BOLSA ILEAL: La proctocolectomía total restaurativa con anastomosis de bolsa ileoanal puede no ser posible en algunos pacientes debido a limitaciones técnicas intraoperatorias.Evaluar los predictores preoperatorios para el abandono intraoperatorio de la bolsa ileoanal y revisar el manejo.Revisión retrospectiva.Cleveland Clinic entre Enero de 2010 y mayo de 2018.Pacientes > 18 años que se sometieron a cirugía de bolsa ileoanal. Los pacientes con una creación exitosa de la bolsa según lo planeado se agruparon como "creación exitosa de anastomosis de bolsa ileoanal". Se revisaron los informes operativos de los pacientes que se sometieron a procedimientos alternativos para identificar los casos en que la bolsa se planificó preoperatoriamente pero se abandonó intraoperatoriamente (grupo de "anastomosis anal de bolsa ileoanal abandonada"). Se desarrollaron modelos de regresión logística multivariante para determinar los predictores del abandono intraoperatorio de la bolsa. También revisamos el manejo de pacientes que fallaron en la creación inicial de la bolsa.Predictores preoperatorios para el abandono intraoperatorio de la bolsa ileoanal.A un total de 1438 pacientes se les ofreció una bolsa ileoanal; 21 (1.5%) experimentaron abandono de la bolsa debido a un alcance inadecuado (n = 17) y otras razones técnicas (n = 4). Estos pacientes se sometieron a procedimientos alternativos como ileostomía final o de asa con / sin proctectomía. El análisis de regresión logística multivariante indicó género masculino (OR, 6.021; IC 95%, 1.540-23.534), índice de masa corporal (OR, 1.217; IC 95%, 1.114-1.329) y procedimiento en 2 etapas (OR, 14.510; IC 95%, 4.123-51.064) como factores independientes asociados con el abandono intraoperatorio de la creación de la bolsa. Los procedimientos alternativos fueron la proctocolectomía total con ileostomía final (n = 14) y la colectomía abdominal total con ileostomía final sin proctectomía (n = 7). Finalmente, la creación de la bolsa se logró en 6/21 pacientes después de un intervalo medio de 8.8 (rango, 4.1-34.8) meses. Todos los pacientes tuvieron pérdida de peso intencional antes de la reintenta y colectomía abdominal total con ileostomía final sin proctectomía como procedimiento inicial.Naturaleza retrospectiva.El abandono de la bolsa ileoanal es raro y puede mitigarse mediante la colectomía abdominal total inicial y la pérdida de peso. Los pacientes masculinos y obesos tienen un mayor riesgo de fracaso. La evaluación intraoperatoria de la viabilidad de la bolsa ileoanal debe ocurrir antes de la disección rectal. Consulte Video Resumen en http://links.lww.com/DCR/B156. (Traducción-Dr. Yesenia Rojas-Kahlil).

Magnetic Resonance Imaging Screening for Trilateral Retinoblastoma: The Memorial Sloan Kettering Cancer Center Experience 2006-2016.

PURPOSE: Magnetic resonance imaging (MRI) has been used for baseline brain imaging and afterward as a screening tool for trilateral retinoblastoma (TRB), but there is no consensus on timing or frequency of screening worldwide. In this study, a cohort of hereditary retinoblastoma patients at increased risk for TRB was identified and the usefulness of aggressive neuroimaging was examined. DESIGN: Retrospective review of the medical records and MRI reports of patients with retinoblastoma treated at Memorial Sloan Kettering Cancer Center between January 1, 2006, and December 31, 2016. PARTICIPANTS: Three hundred forty-nine total patients with retinoblastoma, including 215 hereditary retinoblastoma patients in the screening group. METHODS: We reviewed 804 MRI studies of the orbit or brain. Patient and disease characteristics, including laterality, family history, and gene mutation status were analyzed. The impression of every MRI was coded 1 to 5, each value representing a different abnormality. MAIN OUTCOME MEASURES: We calculated the incidence of TRB in patients with germline disease as well as the incidence of screening MRI scans showing TRB. RESULTS: Among our hereditary retinoblastoma screening cohort (n=215) 4 patients with TRB were identified on screening MRI. All 4 patients showed bilateral disease, pineal gland tumors, and a latency period of at least 1 year. Three of the 4 were deceased by the end of the study. The incidence of TRB diagnosis was 1.9% (95% confidence interval [CI], 0.7%-4.9%). Of the 804 screening MRI scans performed on the screening cohort, 691 (86%) were unremarkable and 4 reported a lesion suspicious for TRB. The overall incidence of detecting TRB on screening MRI in the at-risk cohort was 0.5% (95% CI, 0.2%-1.3%) with a number needed to treat of 202. CONCLUSIONS: All cases of TRB in our center during the study period developed before the patient was 3 years of age and after a total of only 4 lifetime MRIs. Overall survival from TRB was not improved as a result of screening, and many false-positive results required additional, subsequent MRI scans with anesthesia.

Eyelid Eccrine Cyst: An Exceptional Lesion Among Dominant Apocrine Cysts.

A 71-year-old woman developed a small bluish lesion beneath the cilia of the left lower eyelid. Excision and microscopic examination disclosed a cyst with an intimately associated eccrine sweat gland. Immunohistochemistry demonstrated that the cyst's epithelium was strongly CK5/6, CK14, CK7 weakly positive, and gross cystic disease fluid protein-15 and smooth muscle actin negative. This is the first immunohistochemically proven eccrine cyst of the eyelid skin. Apocrine cysts develop only at the eyelid margin where the glands of Moll are located. They immunostain positively for cytoplasmic gross cystic disease fluid protein-15 in the adlumenal cells and smooth muscle actin in an outer myoepithelial (abluminal) layer.

Concurrent gastrointestinal perforation and pulmonary embolism due to bevacizumab in an adult undergoing treatment for stage IV colon cancer.

Bevacizumab is an important component in the treatment of metastatic colorectal cancer when used with 5-fluorouracil, leucovorin and oxaliplatin or irinotecan. As a molecular target agent, it is considered to be less toxic than traditional chemotherapy; however, bevacizumab has been shown to cause serious, life-threatening adverse effects. The following report describes a case of bevacizumab-associated pulmonary embolism with simultaneous gastrointestinal perforation in a patient with stage IV adenocarcinoma of the descending colon. This case report and literature review describes the risk factors, etiology, and typical presentation of bevacizumab-induced gastrointestinal perforation and pulmonary embolism.

Hepatotoxicity due to red bush tea consumption: a case report.

Many conventional drugs used today, including isoniazid, dapsone, and acetaminophen, are well recognized culprits of hepatotoxicity. With increasing use of complementary and alternative medical therapies, several herbal medicines, such as Ma-Huang, kava, and chaparral leaf, have been implicated as hepatotoxins. Hepatotoxicity may be the most frequent adverse reaction to these herbal remedies when taken in excessive quantities. A myriad of liver dysfunctions may occur including transient liver enzyme abnormalities due to acute and chronic hepatitis. These herbal products are often overlooked as the causal etiologic agent during the evaluation of a patient with elevated liver function tests. We describe a case of hepatotoxicity due to ingestion of red bush tea diagnosed during preoperative assessment of a patient scheduled for laparoscopic appendectomy. Elevated liver enzymes and thrombocytopenia detected in the patient's laboratory work up confounded the initial diagnosis of acute appendicitis and additional investigations were required to rule out cholecystitis and other causes of hepatitis. Open appendectomy was done uneventfully under spinal anesthesia without any further deterioration of hepatic function.

Tumors, IGF-2, and hypoglycemia: insights from the clinic, the laboratory, and the historical archive.

Tumors of mesenchymal and epithelial origin produce IGF-2, which activates pathways in the tumors. In a minority of patients, the tumors (hepatomas, fibromas, and fibrosarcomas are the most common among many) release into the circulation enough IGF-2-related peptides to mimic the fasting hypoglycemia characteristic of patients with insulin-producing islet-cell tumors. Rarely, markedly elevated IGF-2 levels produce somatic changes suggestive of acromegaly. Typically, the elevated IGF-2 levels are associated with suppressed plasma levels of insulin, IGF-1, and GH. Complicating the pathophysiology are the IGF binding proteins (IGFBPs) that can bind IGF-2 and IGF-1, modifying hormone metabolism and action. IGFBP concentrations are often altered in the presence of these tumors. At the cellular level, the 3 hormone-related ligands, IGF-2, IGF-1, and insulin, all bind to 4 (or more) types of IGF-1 receptor (IGF-1R) and insulin receptor (IR). Each receptor has its own characteristic affinity for each ligand, a tyrosine kinase, and overlapping profiles of action in the target cells. The IGF-2R, in addition to binding mannose-6-phosphate-containing proteins, provides an IGF-2 degradation pathway. Recent evidence suggests IGF-2R involvement also in signal transduction. Surgery, the treatment of choice, can produce a cure. For patients not cured by surgery, multiple therapies exist, for the tumor and for hypoglycemia. Potential future therapeutic approaches are sketched. From 1910 to 1930, hypoglycemia, insulin, insulinomas, and non-islet-cell tumors were recognized. The latter third of the century witnessed the emergence of the immunoassay for insulin; the IGFs, their binding proteins, and assays to measure them; and receptors for the insulin-related peptides as well as the intracellular pathways beyond the receptor. In closing, we replace non-islet-cell tumor hypoglycemia, an outdated and misleading label, with IGF-2-oma, self-explanatory and consistent with names of other hormone-secreting tumors.

Assessment of margins in resection specimens for head and neck malignancies.

OBJECTIVE: To determine the relative frequency of clear, close and involved margins in resection specimens for head and neck malignancies. STUDY DESIGN: An observational study. PLACE AND DURATION OF STUDY: The Department of Oral and Maxillofacial Surgery, Armed Forces Institute of Dentistry, Rawalpindi and the Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, from January 2008 to December 2010. METHODOLOGY: Tumour registers and computer data bases in the department of Histopathology of Armed Forces Institute of Pathology, Rawalpindi, were analyzed for the cases of malignancies involving head and neck region that were sent for histopathological analysis after resection in the last three years. Histopathology reports were obtained. The data regarding age, gender, site, type of malignancy and margin status (clear, close or involved) was recorded on specially designed proformas for the study and later on analyzed by using SPSS version 17.0. Results were expressed. RESULTS: A total of 319 cases were registered in the study duration. The age of the patients ranged from 22-90 years (mean 59.5 + 14.1 years). Male to female ratio was 1.53:1. One hundred and thirty six (42.6%) were squamous cell carcinoma (SCC), 163 were basal cell carcinomas (BCC, 51.0%); the rest included 18 salivary gland malignancies (5.7%) and one carcino-sarcoma (0.31%) and chondrosarcoma each. All margins were found clear in 137 patients (42.9%); involved in 168 cases (52.7%) and close in 14 cases (4.4%). CONCLUSION: Margin clearance could not be achieved in more than 50% cases, this can lead to poor prognosis. Hence, methods should be adopted to improve the margin clearance in various head and neck malignancies.

Bcl-2 protein expression in mucoepidermoid carcinoma of salivary glands: a single institution experience.

BACKGROUND AND OBJECTIVES: Mucoepidermoid carcinoma is the most common salivary gland tumor with varying behavior among different histopathological grades. The objective of this study was to determine the expression of Bcl-2 protein in mucoepidermoid carcinoma (MEC) and to correlate with histological grades. METHODS: The records of 40 cases of MEC were collected from the histopathology department. Fresh slides were prepared and fresh diagnoses were made using the grading criteria for MEC. Immunohistochemical markers for Bcl-2 were applied and the results analyzed using the chi-square test. RESULTS: Of 40 cases, 20 were males and 20 were females. The range in age of the patients was 6 to 67 years mean (SD) was 42.6 (1.85) years. Twenty-two were low grade (55%), 11 high grade (27.5%) and 7 (17.5%) were intermediate grade MEC. Among these 40 cases, Bcl-2 expression was positive in 24 cases and negative in 16 cases. In 22 cases of low-grade MEC, 19 were positive while only 3 were negative. In high-grade tumors, all 11 cases were found to have a negative expression of Bcl-2 protein. In intermediate-grade MEC, 5 cases showed positive expression while only 2 cases showed negative expression. CONCLUSION: Bcl-2 protein expression showed positive expression in low-grade and negative expression in high-grade MEC. Intermediate grade showed more than 50% positive results for Bcl-2. Correlation between grades of MEC and expression of Bcl-2 is statistically significant and can be used for the depicting the prognosis of MEC along with other prognostic and clinico-pathological parameters.

Basal cell carcinoma of the head and neck region: an analysis of 171 cases.

Objective. To analyze the pattern of presentation of basal cell carcinoma (BCC) and margin status for excised specimens in the head and neck region. Study Design. Retrospective cross-sectional. Duration of Study. January 2009 to December 2011. Methodology. The database of the pathology department was searched to identify records of all malignant skin tumors that underwent standard excision with margins. Out of these records, tumors with a diagnosis of BCC in the head and neck region were retrieved and separated. Age, gender, anatomic location, pattern of tumor, and margin status were noted. Results. A total of 171 cases of BCC from various sites of head and neck were retrieved. Male to female ratio was 1.4 : 1. The age ranged from 22 to 90 years. Seventy-six cases presented on right side, 79 on left, and 16 were in the midline. Most common anatomical site was the nose followed by the cheek. Nodular lesions were the most common (46.2%) followed by pigmented variety (18.7%). Margins were clear in 77 (45.1%) cases, involved in 86 (50.2%) cases, and close in 8 (4.7%) cases. Conclusion. Nose was the most common site followed by the cheek. Nodular and pigmented varieties were the most frequent and margins were involved in more than fifty percent of the cases.