Medicine
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This repository contains the published and unpublished research of the Faculty of Medicine by the staff members of the faculty
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Item A conjunctival myxoid stromal tumor (COMST) mimicking phlyctenulosis: A case report and brief review of the literature(Elsevier, 2022) Medagoda, K.; Salvin, K.A.; Mahendra, B.A.G.G.Purpose: This is a case report of a patient with a conjunctival myxoid stromal tumor (COMST), mimicking a phlyctenulosis. Tumors of the conjunctiva and cornea occupy a large spectrum ranging from benign lesions of myxoma to aggressive, life-threatening malignancies. Phlyctenulosis and phlyctenular keratoconjunctivitis are hypersensitivity reactions to a foreign antigen. Observations: A 64-year-old male presented with six-month history of non-painful lump in the conjunctiva of the left eye. It was a mobile, non-tender, non-ulcerated, non-hemorrhagic, non-pigmented lesion and was non-adherent to the sclera. The differential diagnosis of phlyctenulosis or a soft tissue tumor was considered. The lesion was completely excised. The microscopy showed an ill-defined hypocellular myxoid lesion composed of stellate and spindle-shaped cells with eosinophilic cytoplasm, containing round-ovoid and spindle-shaped nuclei with a vesicular chromatic pattern. The tumor cells were diffusely and strongly positive for vimentin and CD 34 and were negative for S100. The immunomorphological features were compatible with a conjunctival myxoid stromal tumor. Complete systemic evaluation excluded the possible association with systemic myxomas. Conclusions and importance: Myxoid tumors of the conjunctiva are benign tumors, however, they can mimic other benign conditions like phlyctenulosis or more sinister lesions like malignant tumors. Therefore, it is important to do an excisional biopsy to ascertain the definitive pathology of an indeterminate conjunctival lesion. COMST may be the index presentation for the detection of previously undiagnosed myxoma syndromes. One such association is with cardiac myxomas, which can result in vascular embolic events. Therefore, it is important to do cardiac screening in all patients diagnosed with a COMST.Item Heterotopic salivary gland tissue in the gastro-oesophageal junction: a rare entity(College of Pathologists of Sri Lanka, 2021) Dharani, K.; Medagoda, K.; Kumarage, S.K.; Mahendra, B.A.G.G.Introduction: Gastric and pancreatic heterotopia are the two most common types of heterotopias seen in the gastrointestinal tract (GIT). These are the two most common types of heterotopias seen in the oesophagus as well. The occurrence of heterotopic salivary gland tissue (HSGT) in the GIT is rare, and most reported cases are colorectal and anal lesions with only a few cases involving the oesophagus. Case report: A 69-year-old man presented with a seven-month history of gastro-oesophageal reflux disease (GORD). The upper gastrointestinal endoscopy showed a moderate hiatus hernia with a pale pink mucosal patch close to the gastro-oesophageal junction. The biopsy showed oesophageal tissue with morphological changes of mild reflux oesophagitis. The submucosal tissue contained organized glandular structures with mucinous glands and intercalated ducts resembling mature salivary gland tissue. There was no evidence of Barrett oesophagus, dysplasia or neoplasm. Discussion and conclusion: HSGT is most commonly seen in the head and neck region of the body, and its occurrence in the GIT is rare. Occurrence of oesophageal HSGT is extremely rare and most cases have presented with symptoms of GORD. Although HSGT is usually benign and a rare phenomenon, clinicians and pathologists need to be aware of this condition to prevent a delay in diagnosis and inappropriate management.Item Chondroblastoma with atypical features(College of Pathologists of Sri Lanka, 2020) Silva, K.G.H.; Mahendra, B.A.G.G.; Hewavisenthi, S.J.de S.Chondroblastoma (CB) is a rare bone tumour usually occurring in long bones of males in the second decade. Though these are considered benign, rare cases show aggressive behaviour and metastases. However, there are no defined histological criteria to diagnose aggressiveness, except soft tissue (ST) infiltration. With the identification of specific immunohistochemical and genetic signatures, recent research has nurtured the concept of malignant CB and raised concerns that malignant CBs are being frequently misdiagnosed. Here we report a case of a CB with unusual features, in a 62-year-old woman which includes rare location in the scapula, recurrence following a long period after excision, extensive soft tissue invasion, and predominant small round cell morphology. This case intends to add to the limited literature on aggressive CB as well as to the evolving concept of malignant CB. The case also highlights the importance of follow up of patients with CB preventing mutilating surgery.Item Challenges in the diagnosis of lipomatous tumours.(College of Pathologists of Sri Lanka, 2014) Mahendra, B.A.G.G.No abstract availableItem The Role of the pathologist in the assessment of disease activity in ulcerative colitis(College of Pathologists of Sri Lanka., 2018) Mahendra, B.A.G.G.; Hewavisenthi, S.J.De S.ABSTRACT: In order to determine the role of the pathologist in assessing disease activity in UC, clinical and histological correlation of disease activity, correlation between endoscopy and histology and determining the most satisfactory method of scoring histological activity were assessed. A cohort of 41 patients attending a gastroenterology clinic in a tertiary hospital in Sri Lanka was studied. Their clinical activity was determined based on the simple clinical colitis activity index (SCCAI), endoscopically visible inflammation was recorded with reference to the extent of involvement and histology was assessed using three different histological scoring systems. The Spearman rank correlation coefficients between SCCAI and the three histological scoring systems were 0.298, 0.286, and 0.238 respectively denoting poor correlation. The kappa value of agreement between endoscopy and histology was poor (k=0.136). The Spearman rank correlation coefficients between the three histological scoring systems were 0.883, 0.883 and 0.952, reaching a level of statistical significance (p<0.01). The clinical activity and histological activity do not correlate and this is especially when assessing the more proximal colon. Endoscopy and histology also shows no correlation highlighting the importance of microscopic assessment of endoscopically normal mucosa. Finally, the histological scoring systems correlate fairly closely with one another enabling histopathologists to choose one that is most practical for routine use.Item A Possible progression of an atypical leiomyoma to a leiomyosarcoma(Sri Lanka College of Obstetricians & Gynaecologists, 2016) Ekanayake, C.D.; Liyanage, A K.; Herath, R.P.; Fernando, W.S.; Mahendra, B.A.G.G.BACKGROUND: The spectrum of uterine smooth muscle cell tumours can range from leiomyoma to leiomyosarcoma. Atypical leiomyomasare a group of tumours with cellular atypia and a mitotic indexof up to 5/HPF that are classified between the innocuous leiomyoma and leiomyosarcomas. The absence of coagulative necrosis helps to differentiate it from leiomyosarcomas.Traditionally atypical leiomyomas are thought to have a low recurrence rate. CASE DETAILS: A 41-year-old woman underwent a myomectomy for ananteriorcervical fibroid.Histology revealed a smooth muscle tumour (SMT) withdiffusely scattered hyperchromatic large cells. The maximum mitotic count was 5/10 HPF.There was no coagulative necrosis or atypical mitotic figures. It was classified as an atypical leiomyomas and had close follow up. However, 30 months later she developed heavy menstrual bleeding. The ultrasound scan revealed an anterior fibroid. She underwent a total abdominal hysterectomy with ovarian conservation. The specimen showed a well-defined myometrial nodule of 7cm with haemorrhagic areas,compressing the cervix. It was a SMT with high a mitotic activity (11-12/HPF), atypical cells with bizarre nuclei and focal coagulative necrosis confirming a leiomyosarcoma (FIGO 1B). CONCLUSION: As atypical leiomyomashave a low risk profile and are mostly found in younger women,it invariably leads to treatment that offers fertility preservation. This case challenges the generalisability of this currently held viewpoint and recommends more extensive surgery or further heightened surveillanceItem Implementation of an Online Histopathology Reporting System in the Department of Pathology, Faculty of Medicine, University of Kelaniya(19th Conference on Postgraduate Research, International Postgraduate Research Conference 2018, Faculty of Graduate Studies,University of Kelaniya, Sri Lanka, 2018) Hettiarachchi, W.G.; Ediriweera, E.P.D.S.; Mahendra, B.A.G.G.; Liyanage, S.K.; Hewavinsenthi, S.J.D.S.; Ratnayake, R.M.U.S.The Department of Pathology, Faculty of Medicine, University of Kelaniya provides histopathology reporting for the Colombo North Teaching Hospital (NCTH) as an honorable service. The department currently uses a standalone Microsoft access database to generate reports and it has limited data retrieval capabilities. A newer system was required to address the issues faced, mainly a prolonged turnaround time caused by lack of clinical data, inability to track delays in sample processing, delays in data entry and report dispatch. More efficient data retrieval for research purposes and monitoring of postgraduate training were also considered important. The aim of the work was to implement anonline histopathology reporting system that has facility to track the reporting stage, postgraduate evaluation and data retrieval for researches. Every report is attached with a diagnostic code that can be used in research purposes. A web-based application was developed that has ability to capture data at each step from specimen receiving from the surgery theatre until dispatch of reports. The system has developed to easily customizable to different settings. Thus, it has facility to add new reporting templates, anatomical sites, surgical specimens or diagnostic codes to system through web forms. Data entry was facilitated by using drop down menus and prompts. Standard templates for reports with option to edit were uploaded enabling quick report generation. It facilitates postgraduate supervision by enabling the trainer to determine the time taken, quality and quantity of work done by the trainees. Mainly open source scripting languages and databases were used to developed the system: PHP, HTML 5, CSS Javascript, Ajax and MySQL. The system hosted on the faculty intranet and available 24/7 from anywhere at the faculty. The system supports both windows and androids operating systems and the system can be accessed in desktop and tablet computers using any commonly used modern web browsers.Item An audit of lymph node retrieval and histopathology reporting of pancreaticoduodenctomy specimens undertaken at a tertiary care referral center(College of Pathologists of Sri Lanka, 2017) Siriwikum, L.B.D.J.; Samarakoon, N.K.; Liyanage, S.K.; Mahendra, B.A.G.G.; Ratnayake, R.M.U.S.; Hewavisenthi, S.J.de S.Pancreaticoduodenectomy (PD) is currently the main surgical option for malignancies in the ampullary region, which includes ampulla of Vater tumours (AVT), distal bile duct tumours (DBDT), periampullary duodenal tumours (DT) and tumours of the head of the pancreas (PT). Nodal status and many other important pathological features have a significant impact on tumour prognosis and therapy. The aim of this study was to determine the total number of lymph nodes (LNs) retrieved from PD specimens, whether grouping of LNs improves the total yield and to assess the level completeness of histopathology reporting of PD specimens. Forty two PD requests and histopathology reports were assessed to determine the total number of LNs retrieved and whether the LN were grouped (G)or non-grouped (NG). The significance of difference in the number of LNs in the two groups were assessed using the Wilcoxon signed rank test. The tumours were subcategorized as AVT, DBDT, DT and PT and the reports were audited against the respective minimum data sets of the Royal College of Pathologists of United Kingdom to determine the overall completeness and the parameters poorly reported in the reports. The overall median LN yield was 14.5 and the median LN yield was 15 and 10 in G and NG respectively which was statistically significant. The completeness of the histopathology reporting was 63.6%- 77.3% in AVT (n-18), 73.9% - 95.6% in DBDT (n-5), 68.1% - 90.1% in DT (n-8), 70.8% - 83.3% in PT (n-11). The lengths of the bile duct, lesser and greater curvature of the stomach, tumour differentiation, involvement of resection margins and named blood vessels were poorly reported. In conclusion, the total LN retrieval improved by grouping according to the Union of International Cancer Control (UICC) protocol. Histopathology reporting of some of the data items requires improvement. Hence adoption of a pro forma for synoptic reporting and establishment of national guidelines on reporting and handling of specimens is recommended.Item A possible progression of an atypical leiomyoma to a leiomyosarcoma(Sri Lanka College of Obstetricians & Gynaecologists, 2016) Ekanayake, C.D.; Liyanage, A.K.; Herath, R.P.; Fernando, W.S.; Mahendra, B.A.G.G.BACKGROUND: The spectrum of uterine smooth muscle cell tumours can range from leiomyoma to leiomyosarcoma. Atypical leiomyomasare a group of tumours with cellular atypia and a mitotic indexof up to 5/HPF that are classified between the innocuous leiomyoma and leiomyosarcomas. The absence of coagulative necrosis helps to differentiate it from leiomyosarcomas.Traditionally atypical leiomyomas are thought to have a low recurrence rate. CASE DETAILS: A 41-year-old woman underwent a myomectomy for ananteriorcervical fibroid.Histology revealed a smooth muscle tumour (SMT) withdiffusely scattered hyperchromatic large cells. The maximum mitotic count was 5/10 HPF.There was no coagulative necrosis or atypical mitotic figures. It was classified as an atypical leiomyomas and had close follow up. However, 30 months later she developed heavy menstrual bleeding. The ultrasound scan revealed an anterior fibroid. She underwent a total abdominal hysterectomy with ovarian conservation. The specimen showed a well-defined myometrial nodule of 7cm with haemorrhagic areas,compressing the cervix. It was a SMT with high a mitotic activity (11-12/HPF), atypical cells with bizarre nuclei and focal coagulative necrosis confirming a leiomyosarcoma (FIGO 1B). CONCLUSION: As atypical leiomyomashave a low risk profile and are mostly found in younger women,it invariably leads to treatment that offers fertility preservation. This case challenges the generalisability of this currently held viewpoint and recommends more extensive surgery or further heightened surveillance.Item Reducing the public health expenditure through a surgical method that facilitates early mobilization of lower limb burns(Sri Lanka Medical Association, 2017) Perera, C.; Hajith, Z.M.; Mahendra, B.A.G.G.INTRODUCTION & OBJECTIVES: Grafted skin in the conventional way tends to contract towards the midline bridging across the joints. Prolonged immobilization following skin grafting promotes contracture across the joints. In the advanced graft orientation technique (AGOT) devised by the Burns Unit of the National Hospital of Sri Lanka (BU-NHSL), the graft is orientated in a tension free direction. This method does not require prolonged splinting or immobilization. The aim of the study was to assess the impact of graft orientation on early mobilization and prevention of contracture in lower limb (LL) burn patients. METHODS: A total of 61 patients treated with AGOT for LL burns at BU-NHSL (study group-SG) were compared with 21 patients who were primarily treated with conventional skin grafting for LL burns at local hospitals and referred for reconstruction at BU-NHSL (control group-CG). Vancouver Scar Scale (VSS) and range of motions (ROM) of involved joints were measured one year following the date of burn in the SG. These were measured prior to reconstructive surgery in the CG. Comparison was done using independent t-test. RESULTS: Mean value of VSS in the SG and the CG were 2.8889 (SD+1.65878) and 9.4074 (SD+3.21366) respectively. Spared normal joint ROM was seen in 95.6% of the SG. 100% in the CG had reduced joint ROM. CONCLUSION: AGOT has a lesser possibility of contracture across the grafted joints. Lower VSS value in the SG suggests that the quality of grafted skin is closer to normal skin. This technique is beneficial in low and middle income countries where access to specialized burn rehabilitation and health budget is limited.
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