Prognostic role of PD-L1 expression in head and neck squamous cell carcinoma: An institutional experience from India.

BACKGROUND: Squamous cell carcinoma accounts for > 90% of Head and neck cancers and has a poor 5-year survival rate of only 50%. Immunosuppressive agents like PD-L1 inhibitors have been found to improve survival in many tumour types, including advanced/recurrent head and neck squamous cell carcinoma (HNSCC). The PD-L1 expression in this tumour can also predict clinical outcome. However, this fact still remains to be proven. AIM: The aim was to study the expression of PD-L1 in HNSCC, correlate with clinicopathological parameters and outcome. MATERIAL AND METHOD: This prospective study was conducted between March 2021 to June 2023 in department of Pathology of a tertiary care centre located in northern India. A total of 65 histologically confirmed cases of HNSCC were included. Expression of PD-L1 was determined by immunohistochemistry. The combined positive (CPS) and tumour proportion (TP) scores were calculated. The results were correlated with clinicopathological parameters and outcome using appropriate statistical tools. RESULTS: Considering CPS, 42 (64.6%) cases showed expression of PD-L1. A high score of ≥ 20% was seen in 10 cases (15.4%). PD-L1 expression did not correlate with any of the clinical parameters including age, gender, addiction, site, TNM stage and HPV status. Conventional HNSCC had significantly higher expression of PD-L1. The cases with positive PD-L1 expression had a higher mean survival and a lower mortality, but the difference was not statistically significant. CONCLUSION: PD-L1 expression is more likely to be seen in conventional HNSCC histomorphology. PD-L1 expression is a predictor of better prognosis in HNSCC.

Efficacy of Fine-Needle Aspiration Cytology in Diagnosing Secretory Carcinoma of Salivary Gland: A Systematic Review and Meta-Analysis.

INTRODUCTION: The diagnosis of salivary gland secretory carcinoma (SC) in fine-needle aspiration specimens is challenging because its low-grade nature makes it difficult to differentiate it from various benign or malignant salivary gland neoplasms. Currently, the gold standard is demonstration of ETV6-NTRK3 fusion gene. However, the decision for ordering this costly molecular testing can be facilitated by the correct recognition of its cytomorphological features. The aim of the review was to determine the accuracy of fine-needle aspiration cytology (FNAC) in diagnosis of salivary gland SC. The secondary objective was to recognize varied cytomorphological patterns, characteristic features of SC and differentiate it from other neoplasms. METHODS: PubMed/MEDLINE, Science Direct, Embase, Cochrane review, and PROSPERO databases were searched for studies having the following key search terms: ("secretory carcinoma of salivary gland" OR "mammary analogue secretory carcinoma of salivary gland") AND ("Cytology" OR "Cytological features" OR "aspirate" OR "cytodiagnosis") published in the time frame of 2010 to June 2023. Studies reporting cytological features of the salivary gland tumors which were confirmed/diagnosed as SC on molecular investigation, were included in the systematic review. Finally, seventeen studies reporting a total of 45 cases were included in the metanalysis. RESULTS: The sensitivity of the FNAC in diagnosing SC in salivary gland is 27.7% (95% CI: 16.6-42.5%). The LR+ (positive likelihood ratio) was 0.654 (0.344-1.245), LR- (negative likelihood ratio) was 1.023 (0.538-1.946), and diagnostic odds ratio was 0.421 (0.129-1.374). The molecular testing and/or immunohistochemistry performed on cell block increased the diagnostic accuracy. CONCLUSION: Recognition of subtle cytomorphological patterns, i.e., papillary formation, clusters, and singly dispersed cells along with presence of fine intracytoplasmic vacuolations were the characteristic findings in majority of cases, confirmed with diagnostic molecular profiling. This may be helpful in identification of this rare entity with limited published literature and help in increasing diagnostic accuracy.

Medical students' perspective on online teaching during pandemic: Experience from a Government Medical College in Uttarakhand, India.

BACKGROUND: COVID-19 pandemic has forced medical education to undergo sudden metamorphosis from the traditional face-to-face education to distance online learning. This transition was dealt with a lot of infrastructure and technical difficulties from both teacher and learner ends, especially in a developing country like India. This study was conducted with the aim of analyzing students' perspective and problems faced in the live online teaching. MATERIALS AND METHODS: This was a prospective longitudinal study conducted on medical students enrolled in the 1st, 2nd, and 3rd years of Bachelor of Medicine and Bachelor of Surgery courses at a government medical college located in hilly state Uttarakhand, India. Clearance from the institutional ethical committee was obtained. The students were invited to voluntarily participate in online survey by filling Google Forms which was E-mailed as well as shared in social media platform. A total of 237 medical students participated. The first survey was conducted at the time of initiation of online mode of teaching, during May 1-7, 2020, and second, after completion of 6 months of regular online teaching, during November 1-7, 2020. The questionnaire comprised initial section on demographic details and consent followed by 27 and 30 sets of statements pertaining to online medical education experience in the first and second questionnaires, respectively. A 5-point Likert scale was used. Data were analyzed using IBM SPSS version 24.0. Chi-square test was applied for association, and P ≤ 0.05 was considered statistically significant. RESULTS: A total of 237 students participated in the study. The response rate was 52.7%. Majority of respondents had suitable devices (89.1%) and Internet facilities (62%) for online classes. The students accepted the new method of teaching very well, but for practical sessions and clinics, traditional classes were necessary. Long screen time, lack of student-teacher interaction, and interaction with peers were major concerns of students. However, over the study period, the availability of resources, friendliness toward technology, and inclination toward virtual classes increased. CONCLUSIONS: The pandemic has introduced to a new normal where online teaching cannot be ignored. Despite challenges faced during online learning, 65.5% of students preferred hybrid teaching in future for delivering medical education. Acceptance for online education by students increased over time in the study.

Role of Haematological Changes in Predicting Occurrence of Leishmaniasis- A Study in Kumaon Region of Uttarakhand.

INTRODUCTION: A number of cases of Leishmaniasis have been reported from non-endemic sub-himalayan regions of India. Due to low clinical suspicion and atypical presentation, cases may go undetected or there may be a delay in diagnosis. AIM: The aim of the study was to evaluate clinico-haematological parameters and bone marrow findings so that a high degree of suspicion could be made in unsuspected cases of Visceral Leishmaniasis (VL) and Leishman Donovan (LD) body negative bone marrow smears. MATERIALS AND METHODS: A retrospective study was conducted at a tertiary care centre serving the kumaon region of Uttarakhand from 2010 to 2014. Forty bone marrow aspirates were included, which were sent on clinical suspicion of VL. Twenty cases were positive for LD bodies. Their clinico-haematological features including bone marrow findings were studied in detail and compared with rest of the 20 LD negative cases. Five LD negative cases were also positive for rk39. RESULTS: Twenty LD positive cases were evaluated. Splenomegaly was the most common sign present in 17 cases (85%). Anaemia, leucopenia and lymphocytosis were present in all the cases (100%). Pancytopenia was seen in 17 cases (85%). Microcytic hypochromic blood picture was the most common finding in 11 cases (55%). Bone marrow was normocellular in 7 cases (35%), hypercellular in 7 cases (35%). Erythropoesis was micro-normoblastic in 11 cases (55%). Overall, there were 25 cases of VL (20 LD positive, 5 LD negative). Increased plasma cells, lymphocytes and histiocytes were seen in 17 cases (68%) of VL. CONCLUSION: In non-endemic region where clinical suspicion is low, bone marrow findings can be a strong indicator for VL even though marrow is negative for LD bodies. If required other ancillary investigations can also be ordered. This study also emphasizes the need for epidemiological work up in this region.

Cytomorphological features of papillary cystadenocarcinoma of parotid gland: A case report with review of literature.

Papillary cystadenocarcinoma is a very rare slow growing malignant neoplasm characterized by cysts and intraluminal papillary projections. It is defined by WHO as a separate entity. On FNA, cytological features can mimic with various papillary and cystic neoplasms of salivary gland. It is also difficult to distinguish from benign salivary gland neoplasms as it has bland nuclear features. Thus we present cytomorphological features and discuss its differential diagnosis with neoplasms having prominent papillary architecture with review of literature.

Multicentric aggressive mammary fibromatosis with cytological features and review of literature.

Fibromatosis is a fibroblastic lesion composed of uniform fibroblasts and collagen with an infiltrative growth pattern but lacking malignant cytological features. It is a rare entity and is even more unusual when found in the breast. Multicentricity in fibromatosis has been reported in 10% cases. Multicentricity in breast cancer has been defined as the presence of two or more tumor foci within different quadrants of the same breast. Considering this definition of multicentricity for fibromatosis, we herein report a case of recurrent multicentric aggressive mammary fibromatosis and its cytological features with review of literature because of limited literature of (FNAC) in mammary fibromatosis.

Huge uterine-cervical diverticulum mimicking as a cyst.

Here we report an incidental huge uterine-cervical diverticulum from a total abdominal hysterectomy specimen in a perimenopausal woman who presented with acute abdominal pain. The diverticulum was mimicking with various cysts present in the lateral side of the female genital tract. Histopathological examination confirmed this to be a cervical diverticulum with communication to uterine cavity through two different openings. They can attain huge size if left ignored for long duration and present a diagnostic challenge to clinicians, radiologists, as well as pathologists because of its extreme rarity. Therefore, diverticula should also be included as a differential diagnosis. Its histopathological confirmation also highlights that diverticula can present as an acute abdomen, requiring early diagnosis with appropriate timely intervention. Immunohistochemistry CD 10 has also been used to differentiate it from a mesonephric cyst.

An approach to histology-based diagnosis and treatment of Madura foot.

Madura foot is a deep mycosis commonly seen in tropical and subtropical countries such as India. Its incidence is likely to rise in temperate regions as well, due to the increase in worldwide travel. The cases presented here are all agricultural workers from a rural part of northern India who had induration, fibrosis and minimal discharge from sinuses over the foot. Although culture remains the gold standard diagnostic test, this case report highlights the importance of histopathology in the early diagnosis and differentiation of common causative agents in Madura foot as repeated cultures are sometimes negative. Thus for mycetomas in which causative infectious agents cannot be isolated, histology may prove beneficial by avoiding inadvertent use of combined antifungal and antimicrobial agents so that a correct therapeutic modality can be decided, prognostic outcome be explained to the patient, and a preventable cause of deformity and disability can be identified and treated at an early stage.

Kala-azar--a case series from non endemic area, Uttarakhand.

Resurgence of kala azar in India has posed many problems. Apart from endemic areas, cases are being reported from non-endemic area. Other than diagnostic difficulties, resistance to stibogluconate & relapses are common problem in sporadic visceral leishmaniasis (VL). We present one case in detail & give brief description of nine other cases, hailing from non-endemic area, Uttarakhand, during the period from December 2005 to September 2011, diagnosed in our teaching hospital. The patients in our study were diagnosed as VL by clinical findings and confirmed by demonstration of LD bodies in splenic or bone marrow smears. Six cases were treated successfully with amphotericin. One case died during treatment and three cases lost the follow up. Clinician should suspect and investigate for VL in patients with pyrexia of unknown origin even when the disease is not endemic in a specific region for early diagnosis.

Pilomatricoma mimicking small round cell tumor on fine needle aspiration cytology: a case report.

BACKGROUND: Pilomatricoma, a benign skin adnexal tumor, frequently leads to false positive diagnosis cytologically. We report a rapidly growing nodular swelling misdiagnosed as round cell tumor cytologically and found to be pilomatricoma histopathologically. CASE: A 32-year-old man presented with a rapidly growing, mobile nodule on his left arm for 4 months with fixed, shiny overlying skin. Fine needle aspiration cytology (FNAC) sample was cellular, showing round to ovoid cells dispersed or in clusters with occasionally rosette-like appearance. Cells displayed round, granular nuclei, single to multiple small nucleoli, absent to scant cytoplasm, a moderate amount of granular cytoplasm and apoptotic and mitotic figures in places. Nuclear moldings were encountered occasionally. Cytologically the diagnosis of blue round cell tumor was made. Histopathologic examination showed islands of basaloid cells with scant cytoplasm and shadow cells and occasional giant cells. The diagnosis was pilomatricoma bistopathologically. Rapidly growing, early lesions of pilomatricoma are predominantly composed of basaloid cells and mostly devoid of other diagnostic clues, leading to a false impression of malignancy. To avoid misdiagnosis, all skin-based nodules should undergo extensive cytologic sampling from diferent sites. Pilomatricoma should be considered in diferential diagnosis when primitive-appearing cells are aspirated, especially in rapidly growing early lesions.

Presence of Hb S in Uttaranchal.

Haemoglobin-S has been reported in several studies on remote populations from various parts of India eg Maharashtra, Madhya Pradesh, Andhra Pradesh, Orissa, West Bengal, Rajasthan and Malaysian Indians. Uttaranchal also has got scattered areas with people living in remote-pockets due to its geophysical nature. There has been no previous report from this state about prevalence of Hb-S. In the present study on 38 individual eight were found to have Hb-S positivity by sickling test. In one of these electrophoretic confirmation was positive with demonstration of associated Beta thalassaemia. The group was a family of muslims in village Baghori near Haldwani. Due to technical, geographical and social restrictions further study could not be done. However, this study does establish the presence of Hb-S-Beta thalassaemia in Uttaranchal State for the first time. Follow up study in the affected area and elsewhere in the state might discover more of Hb-S positivity, other haemoglobinopathies and thalassaemias.

A rare presentation of invasive rhino-orbital mucormycosis in an immunocompetent young girl: a case report.

A 18 year young, healthy, immunocompetent girl presented with proptosis of left eye, referred to eye OPD, suspected clinico-radiologically as malignancy. This presentation with suspicion of malignancy resulted into extensive surgical debridement with removal of left eye, which was diagnosed as mucormycosis on histopathological examination. Her eye could have been saved if the mucormycosis was highly suspected initially, because of the good general health and immunocompetency led to misdirected thought.

TORCH infection in women with bad obstetric history--a pilot study in Kumaon region.

TORCH infections in the mother are transmissible to fetus in the womb or during the birth process and cause a cluster of symptomatic birth defects. In mother they are inapparent or asymptomatic and hence difficult to diagnose clinically. Over a nine months period 20 pregnant women with bad obstetric history were-studied. Seropositivity of Toxoplasma, rubella, CMV, and HSV infections (TORCH) were demonstrated by the presence of IgM and IgG antibodies by ELISA method. It was found that, IgM antibodies were positive in 4 cases (20%) for Toxoplasma, 4 cases (28.6%) for rubella and 4 cases (26.7%) for CMV and HSV each. IgG antibodies were positive in 11cases (55%) for Toxoplasma, 10 cases (66.6%) for rubella, 14 cases (93%) for CMV and 11 (73%) for HSV. Therefore all antenatal cases with BOH should be routinely screened for TORCH as early diagnosis and appropriate intervention will help in proper management and fetal outcome.