Publications by authors named "Mark Puhaindran"

Major limb amputation in a child is a rare but devastating injury associated with significant psychosocial and financial burden. This, combined with the higher growth and remodelling potential despite segmental limb loss, decreases the threshold for replantation in children. Advances in microsurgical techniques and a better understanding of such injuries have led to lower limb replantation becoming a feasible option, with good long-term functional outcomes, even in bilateral amputations.

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Purpose: The objective of this study was to evaluate the Masada and Jo classifications for clinical use in patients with forearm deformity caused by hereditary multiple osteochondroma and propose a new classification system that is all-inclusive and can guide clinical management.

Methods: A retrospective review of 275 forearms was performed. A split-sample approach was used, where 138 forearms were analyzed to create a new classification, which was then validated on the remaining 137 forearms.

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» Tumors of the brachial plexus are uncommon and can present as a mass, with or without neurological symptoms. At times, asymptomatic tumors are also picked up incidentally when imaging is performed for other reasons.» Magnetic resonance imaging is the main imaging modality used to evaluate tumors of the brachial plexus.

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Article Synopsis
  • * The Birmingham Orthopaedic Oncology Meeting in January 2024 gathered 300 experts from over 50 countries to reach global consensus on chondrosarcoma treatment and address challenges related to periprosthetic joint infection in cancer surgeries.
  • * The meeting aimed to not only resolve current controversies but also to encourage collaboration among specialists for future research that could improve patient outcomes worldwide.
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Artificial intelligence (AI) has witnessed significant advancements, reshaping various industries, including healthcare. The introduction of ChatGPT by OpenAI in November 2022 marked a pivotal moment, showcasing the potential of generative AI in revolutionising patient care, diagnosis and treatment. Generative AI, unlike traditional AI systems, possesses the ability to generate new content by understanding patterns within datasets.

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Surgical reconstruction can restore length and function, but cannot adequately resolve the problem of disfigurement. Prosthetic fitting can play a complementary role in enhancing the aesthetic outcomes post reconstruction. However, complex reconstruction involving flaps coupled with the surgical imperative for limb length preservation can lead to outcomes where the reconstructed stumps are challenging to fit with prosthesis.

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Introduction: Malignant peripheral nerve sheath tumors (MPNSTs) are malignancies that demonstrate nerve sheath differentiation in the peripheral nervous system. They can occur sporadically or be associated with neurofibromatosis type 1 (NF1), an autosomal dominant neurocutaneous disorder, with up to 13% of patients developing MPNSTs in their lifetimes. Previous studies have suggested conflicting findings regarding the prognosis of NF1 for patients with MPNSTs.

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Published reports on the functional benefits of esthetic prosthesis are based on either anecdotal evidence or simplified, nonstandard forms of hand function evaluation performed by the researcher. It is not clear whether and how patients actually make functional use of their prosthesis on a daily basis. We report a case of a patient with a partial hand amputation who was initially ambivalent about fitting an esthetic prosthesis, but went on to make functional use of her prosthesis for activities of daily living, work, and social life at 3 years after injury.

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Background: Color matching is a critically important part of, and by far, also the most challenging aspect of producing esthetic silicone prosthesis. There is a knowledge gap in the literature and a lack of opportunities for training in the expertise, particularly regarding color-matching techniques.

Objective: This article details a color-matching technique that is able to achieve life-like coloration in esthetic prosthesis.

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We analysed the differences in clinical presentation between proximal (above elbow) and distal (below elbow) upper limb metastases in a retrospective review of patients presenting to our centre from 2011 to 2019. There were 55 cases, 64% involving the humerus and 62% occurring in men. The median age at the time of diagnosis was 64 years.

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Pigmented nail lesions are challenging problems. The differential diagnosis is broad and ranges from common self-limiting conditions, such as subungual hematoma and infection, to potentially fatal conditions, such as subungual melanoma. Clinical assessment and adjuncts, such as dermoscopy and imaging, are usually insufficient to establish a diagnosis, and a nail bed biopsy is often required.

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Background: Peripheral Nerve Sheath Tumors (PNST) are a diverse group of mostly benign tumours uncommon in the general population. About 5-10% of PNSTs are hereditary, predominantly arising from germline variants in NF1, NF2, SMARCB1, or LZTR1 gene.

Methods: We reviewed the clinical characteristics and genetic testing results of patients referred to the NCIS Adult Cancer Genetics Clinic for suspected hereditary PNST.

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Background: Pediatric osteosarcoma outcomes among developed and developing countries have not been previously compared. Countries in Southeast Asia (SEA) have a wide variety of socioeconomic statuses. A multi-institutional retrospective study was conducted to determine the prognostic factors and outcomes for pediatric osteosarcoma in SEA.

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Purpose: Upper limb masses are one of the most common presentations in the outpatient setting. However, there is a paucity of information in the literature regarding the epidemiology of upper-extremity masses in the pediatric population. The aim of this study was to determine the differential diagnoses and clinical characteristics in children aged ≤18 years presenting with upper limb masses.

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Soft tissue sarcoma (STS) is a heterogeneous disease that arises from connective tissues. Clinical outcome of patients with advanced tumors especially de-differentiated liposarcoma and uterine leiomyosarcoma remains unsatisfactory, despite intensive treatment regimens including maximal surgical resection, radiation, and chemotherapy. MAP kinase-interacting serine/threonine-protein kinase 1 and 2 (MNK1/2) have been shown to contribute to oncogenic translation via phosphorylation of eukaryotic translation initiation factor 4E (eIF4E).

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Angiosarcoma (AS) is a rare disease with a dismal prognosis. The treatment landscape and prognostic factors for advanced AS, including locally advanced, unresectable, and metastatic disease remain elusive. The Asian Sarcoma Consortium is an international collaborative effort to understand the sarcoma treatment landscape in Asia.

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The COVID-19 pandemic has disrupted all segments of daily life, with the healthcare sector being at the forefront of this upheaval. Unprecedented efforts have been taken worldwide to curb this ongoing global catastrophe that has already resulted in many fatalities. One of the areas that has received little attention amid this turmoil is the disruption to trainee education, particularly in specialties that involve acquisition of procedural skills.

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The case spectrum in hand surgery is one of extremes-purely elective day surgery cases under local anesthesia to mangling limb injuries that require immediate, and frequently, lengthy, surgery. Despite the cancellation of most elective orthopedic and plastic surgical procedures, hand surgeons around the world continue to see a steady stream of limb-threatening cases such as severe trauma and infections that require emergent surgical care. With the increase in community-spread, an increasing number of COVID-19-infected patients may be asymptomatic or have mild, nonspecific or atypical symptoms.

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Management of malignant peripheral nerve sheath tumours (MPNSTs) is primarily surgical, involving surgical resection with wide margins, and frequently radiation therapy. When a MPNST involves a major peripheral nerve, wide resection leads to significant distal neurologic deficits. A patient who underwent resection of a MPNST involving the median nerve above the elbow is presented.

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Most tumors of the hand and the wrist are benign; however, malignant conditions can mimic benign tumors and must be worked up accordingly. Advanced imaging should be followed by biopsy before definitive treatment of tumors of unknown diagnosis. The most common soft-tissue masses in the hand and the wrist are ganglion cysts, whereas the most common bone tumors are enchondromas.

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Lipomas are benign fatty tumors with a high prevalence rate, mostly found in adults but have a good prognosis. Until now, reason for lipoma occurrence not been identified. We performed whole exome sequencing to define the mutational spectrum in ten lipoma patients along with their matching control samples.

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Negative-pressure wound therapy (NPWT) has gained increasing popularity among clinicians since its introduction in 1997 as a potential aid to wound healing. Multiple benefits of NPWT have since been proven in studies, including increase in granulation tissue formation, decrease in bacterial load, and the improved survival of flaps. With our increasing use and greater understanding of the tissue and cellular changes that occur in a wound treated with NPWT, our lower-limb reconstructive practice has also evolved.

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Management of sarcomas in the lower extremities have evolved from amputations to limb-preserving surgeries with evidence to support that they have equal overall survival, albeit with better functional outcome. The challenge of reconstruction lies in providing a durable, functional, and aesthetically pleasing limb. However, limb-preserving intention should not delay interventions that provide a survival benefit such as chemotherapy and radiotherapy.

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