1.Intra-articular Nodular Fasciitis: An Unexpected Diagnosis for a Joint Lesion: A Case Report
MF Michelle Chan ; KO Ong ; SS Leon Foo ; S Selvarajan
Malaysian Orthopaedic Journal 2014;8(2):63-65
Pathological lesions in and around a joint can arise
from underlying dermis, subcutis, deep muscle, bone or
synovium. Clinical presentation can include joint pain,
joint swelling, palpable masses and mechanical restriction.
Whilst giant cell tumour of tendon sheath, pigmented
villonodular synovitis, synovial chondromatosis, lipoma
arborescens, juxta articular myxomas and inflammatory
arthritis are the better-known conditions of the joint.
Intra-articular nodular fasciitis, on the other hand, is less
well recognized both clinically and radiologically. It is
rarely seen in routine practice and is only described in case
reports in the literature. Due to the non-specific clinical
and radiological findings as well as the unfamiliarity with
the entity, the diagnosis of intra-articular nodular fasciitis
is usually clinched only after histological examination.
We present a case of intra-articular nodular fasciitis arising
in the knee joint which was not suspected clinically or
radiologically
Knee Joint
2.Giant labial fi broepithelial stromal polyp
Michelle Chan Mei Fung ; Yong Tze Tien ; Kesavan Sittampalam
The Malaysian Journal of Pathology 2013;35(1):91-94
We report an18-year-old girl with a four-year history of a slow-growing labial mass with a sudden
increase in size in the last year. Examination revealed a large fl eshy 20 cm perineal mass centering
on the left labia majora and attached to it by a 1cm pedicle. It was associated with pain, ulceration
and discharge. The lesion was excised via diathermy at the base of the stalk. The excised specimen
weighed 1.112kg and measured 20.5 x 17 x 5cm. The lesion showed a solid, soft whitish, cut
surface. Histology revealed a hypocellular tumour with focally oedematous fi brous stroma in
which were scattered large and small blood vessels, mast cells and other chronic infl ammatory cells.
True myxoid matrix was not observed. The stromal cells had a spindle to stellate morphology.
There was no signifi cant cytological atypia, mitotic activity or necrosis. The tumour cells were
negative for SMA, desmin, CD34, S100 protein, EMA and PR. The diagnosis was clinically and
histologically challenging because various vulvovaginal soft tissue tumours often have overlapping
clinicopathological features. However, based on strict histological criteria and the absence of
worrisome cytological features, a diagnosis of fi broepithelial stromal polyp was rendered despite
the unusual size. A review of the literature shows that whilst vulvovaginal fi broepithelial stromal
polyps are well described, giant variants are rare. Awareness of the extraordinary size that can be
attained by such polyps can fascilitate swift clinical and histological diagnosis.
4.Management of thrombotic thrombocytopenic purpura in metastatic prostate cancer with only endocrine therapy.
Ravindran KANESVARAN ; Colin PHIPPS ; Christopher W S CHENG ; Michelle M F CHAN ; Daphne KHOO ; Min Han TAN
Annals of the Academy of Medicine, Singapore 2010;39(7):580-582
Androgen Antagonists
;
therapeutic use
;
Anilides
;
therapeutic use
;
Antineoplastic Agents, Hormonal
;
therapeutic use
;
Bone Neoplasms
;
complications
;
secondary
;
Goserelin
;
therapeutic use
;
Humans
;
Male
;
Middle Aged
;
Nitriles
;
therapeutic use
;
Prostatic Neoplasms
;
complications
;
drug therapy
;
Purpura, Thrombotic Thrombocytopenic
;
drug therapy
;
etiology
;
Tosyl Compounds
;
therapeutic use
5.Acute Generalized Exanthematous Pustulosis Caused by Daptomycin.
Teoh Yee LENG ; Mark Koh Jean AAN ; Michelle CHAN ; Liu Tsun TSIEN
Annals of Dermatology 2011;23(Suppl 3):S288-S289
Daptomycin, a lipopeptide antibiotic with similar action as vancomycin, is used to treat complicated skin and soft tissue infections caused by resistant Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus, penicillin-resistant streptococci, and vancomycin-resistant enterococci. Acute generalized exanthematous pustulosis (AGEP), characterized by acute onset of numerous sterile, nonfollicular pinhead sized pustules, is common secondary to drugs, in particular, antibiotics. We present the first case of AGEP following the use of daptomycin.
Acute Generalized Exanthematous Pustulosis
;
Anti-Bacterial Agents
;
Daptomycin
;
Gram-Positive Bacteria
;
Methicillin-Resistant Staphylococcus aureus
;
Skin
;
Soft Tissue Infections
;
Vancomycin
6.Biomimetic nanostructured materials: potential regulators for osteogenesis?
Michelle NGIAM ; Luong T H NGUYEN ; Susan LIAO ; Casey K CHAN ; Seeram RAMAKRISHNA
Annals of the Academy of Medicine, Singapore 2011;40(5):213-222
Nanostructured materials are gaining new impetus owing to the advancements in material fabrication techniques and their unique properties (their nanosize, high surface area-to-volume ratio, and high porosity). Such nanostructured materials mimic the subtleties of extracellular matrix (ECM) proteins, creating artifi cial microenvironments which resemble the native niches in the body. On the other hand, the isolation of mesenchymal stem cells (MSCs) from various tissue sources has resulted in the interest to study the multiple differentiation lineages for various therapeutic treatments. In this review, our focus is tailored towards the potential of biomimetic nanostructured materials as osteoinductive scaffolds for bone regeneration to differentiate MSCs towards osteoblastic cell types without the presence of soluble factors. In addition to mimicking the nanostructure of native bone, the supplement of collagen and hydroxyapatite which mimic the main components of the ECM also brings signifi cant advantages to these materials.
Biomimetics
;
instrumentation
;
methods
;
Bone Transplantation
;
Collagen Type I
;
Extracellular Matrix
;
Humans
;
Mesenchymal Stromal Cells
;
Nanostructures
;
Osteogenesis
;
Tissue Engineering
;
instrumentation
;
methods
7.Leprosy in Pregnancy: A Case Series in 4 Dermatology Clinics in Malaysia
Ken Chen LOH ; Min Moon TANG ; Wooi Chiang TAN ; Lee Chin CHAN ; Sook Yee Michelle Voo ; Suganthi THEVARAJAH
Malaysian Journal of Dermatology 2018;40(June):41-48
IntroductionManagement of leprosy in pregnancy is challenging. Here we aim to describe the clinical characteristicsand the management of leprosy in pregnancy.MethodsThis is a retrospective study on pregnant women with leprosy managed in the Department ofDermatology in Hospital Kuala Lumpur, Hospital Pulau Pinang, Hospital Sultanah Bahiyah andHospital Queen Elizabeth between 1994 and 2015.ResultsThere were ten patients with 12 pregnancies with a median age of 27.5 years (range: 16-33). Fivewere foreigners. There were four cases of lepromatous leprosy, two cases of borderline lepromatous,two cases borderline tuberculoid leprosy and one case each for tuberculoid and mid borderline leprosy.Seven pregnancies (58%) were documented to have reactions. Four reversal reactions (33%), threeerythema nodusom leprosum (25%) and two Lucio’s phenomenon (17%) were documented. Bothpatients with Lucio’s phenomenon had undiagnosed leprosy and presented with preterm labour,anemia, oligohydramnios and intrauterine growth restriction. Mortality was recorded in one patientdue to dapsone induced hypersensitivity syndrome complicated with septicaemia. All patients wereprescribed multidrug therapy but in three pregnancies, the patients chose to defer the treatment. Therewas a spontaneous miscarriage at second trimester and a case of early neonatal death. The neonatalcomplications recorded for the 10 live deliveries were low birth weight, jaundice and clofazimineinducedhyperpigmentation.ConclusionThe majority of our patients with leprosy had complications throughout the pregnancies. Earlydetection and prompt treatment can prevent unfavorable fetal outcome & threatened maternal health.
8.Is Ossiculoplasty Necessary in Canal Wall Down Mastoidectomy? Comparison of Clinical Outcomes Between Type 0 Tympanoplasty and Ossiculoplasty
Michelle J. SUH ; Jin-A PARK ; Hee Jun YI ; Chan Il SONG
Journal of Audiology & Otology 2021;25(2):104-109
Background and Objectives:
To assess whether the audiological and clinical outcomes of type 0 tympanoplasty (T0) performed using cartilage were comparable with those of ossiculoplasty in patients who underwent canal wall down mastoidectomy (CWDM).
Subjects and Methods:
This study included patients who had chronic otitis media with cholesteatoma and underwent CWDM with ossiculoplasty involving partial ossicular replacement prosthesis (PORP), total ossicular replacement prosthesis (TORP), or T0. Anatomical success rates and hearing outcomes were analyzed.
Results:
Seventy-two patients were included in this study; 29 of them underwent CWDM with T0, 27 underwent CWDM with PORP, while 16 underwent CWDM with TORP. The difference in mean improvement in the air-bone gap (ABG) between the groups was not significant. The differences in the rates of ABG closure to ≤10 dB HL (p=0.030) and ≤20 dB HL (p=0.029) were significant. There were significant differences in improvements in the ABG at 3 kHz among the PORP, TORP, and T0 groups.
Conclusions
The audiological outcomes of CWDM with ossiculoplasty seemed to be better than those of CWDM with T0 with no significant difference in the incidence of complications following ossiculoplasty and T0.
9.Electrocardiographic Criteria for Left Ventricular Hypertrophy in Asians Differs from Criteria Derived from Western Populations--Community-based Data from an Asian Population.
Chang Fen XU ; Eugene S J TAN ; Liang FENG ; Rajalakshmi SANTHANAKRISHNAN ; Michelle M Y CHAN ; Shwe Zin NYUNT ; Tze Pin NG ; Lieng Hsi LING ; A Mark RICHARDS ; Carolyn S P LAM ; Toon Wei LIM
Annals of the Academy of Medicine, Singapore 2015;44(8):274-283
INTRODUCTIONElectrocardiographic (ECG) criteria for left ventricular hypertrophy (LVH), such as the Cornell and Sokolow-Lyon voltage criteria were derived from Western populations. However, their utility and accuracy for diagnosing echocardiographic LVH in Asian populations is unclear. The objective of this study was to assess the accuracy of ECG criteria for LVH in Asians and to determine if alternative gender-specific ECG cut-offs may improve its diagnostic accuracy.
MATERIALS AND METHODSECG and echocardiographic assessments were performed on 668 community-dwelling Asian adults (50.9% women; 57 ± 10 years) in Singapore. The accuracy of ECG voltage criteria was compared to echocardiographic LVH criteria based on the American Society of Echocardiography guidelines, and Asian ethnicity and gender-specific partition values.
RESULTSEchocardiographic LVH was present in 93 (13.6%) adults. Cornell criteria had low sensitivity (5.5%) and high specificity (98.9%) for diagnosing LVH. Modified gender specific cut-offs (18 mm in women, 22 mm in men) improved sensitivity (8.8% to 17.5%, 0% to 14.7%, respectively) whilst preserving specificity (98.2% to 94.2%, 100% to 95.8%). Similarly, Sokolow-Lyon criteria had poor sensitivity (7.7%) and high specificity (96.1%) for diagnosing LVH. Lowering the cut-off value from 35 mm to 31 mm improved the sensitivity in women from 3.5% to 14% while preserving specificity at 94.2%. A cut-off of 36 mm was optimal in men (sensitivity of 14.7%, specificity of 95.5%).
CONCLUSIONCurrent ECG criteria for LVH derived in Western cohorts have limited sensitivity in Asian populations. Our data suggests that ethnicity- and gender-specific ECG criteria may be needed.
Aged ; Asian Continental Ancestry Group ; statistics & numerical data ; Dimensional Measurement Accuracy ; Echocardiography ; methods ; Female ; Humans ; Hypertrophy, Left Ventricular ; diagnosis ; ethnology ; Male ; Middle Aged ; Sensitivity and Specificity ; Sex Factors ; Singapore ; epidemiology
10.The Clinical Value of PELP1 for Breast Cancer: A Comparison with Multiple Cancers and Analysis in Breast Cancer Subtypes
Xingen WANG ; Julia YS TSANG ; Michelle A LEE ; Yun Bi NI ; Joanna H TONG ; Siu Ki CHAN ; Sai Yin CHEUNG ; Ka Fai TO ; Gary M TSE
Cancer Research and Treatment 2019;51(2):706-717
PURPOSE: Proline, glutamic acid, and leucine-rich protein 1 (PELP1), a novel nuclear receptor (NR) co-regulator, is highly expressed in breast cancer. We investigated its expression in breast cancer subtypes, in comparison with other breast markers as well as cancers from different sites. Its prognostic relevance with different subtypes and other NR expression was also examined in breast cancers. MATERIALS AND METHODS: Immunohistochemical analysis was performed on totally 1,944 cancers from six different organs. RESULTS: PELP1 expression rate was the highest in breast cancers (70.5%) among different cancers. Compared to GATA3, mammaglobin and gross cystic disease fluid protein 15, PELP1 was less sensitive than GATA3 for luminal cancers, but was the most sensitive for non-luminal cancers. PELP1 has low expression rate (<20%) in colorectal cancers, gastric cancers and renal cell carcinomas, but higher in lung cancers (49.1%) and ovarian cancers (42.3%). In breast cancer, PELP1 expression was an independent adverse prognostic factor for non-luminal cancers (disease-free survival [DFS]: hazard ratio [HR], 1.403; p=0.012 and breast cancer specific survival [BCSS]: HR, 1.443; p=0.015). Interestingly, its expression affected the prognostication of androgen receptor (AR). AR(pos)PELP1(lo) luminal cancer showed the best DFS (log-rank=8.563, p=0.036) while AR(neg)PELP1(hi) non-luminal cancers showed the worst DFS (log-rank=9.536, p=0.023). CONCLUSION: PELP1 is a sensitive marker for breast cancer, particularly non-luminal cases. However, its considerable expression in lung and ovarian cancers may limit its utility in differential diagnosis in some scenarios. PELP1 expression was associated with poor outcome in non-luminal cancers and modified the prognostic effects of AR, suggesting the potential significance of NR co-regulator in prognostication.
Breast Neoplasms
;
Breast
;
Carcinoma, Renal Cell
;
Colorectal Neoplasms
;
Diagnosis, Differential
;
Glutamic Acid
;
Immunohistochemistry
;
Lung
;
Lung Neoplasms
;
Ovarian Neoplasms
;
Phenobarbital
;
Prognosis
;
Proline
;
Receptors, Androgen
;
Stomach Neoplasms