The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
Peter Basse - One of the best experts on this subject based on the ideXlab platform.
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Thrombosis of the Ulnar Veins : an unusual manifestation of Loa loa filariasis
Scandinavian journal of infectious diseases, 1998Co-Authors: Søren Petersen, Jens Rønne-rasmussen, Peter BasseAbstract:A 49-y-old male, who had travelled in Central Africa, was admitted to hospital with oedema of the right forearm. He was diagnosed as having thrombosis of the Ulnar Veins. Subsequently eosinophilia and positive serology for filariae established the aetiologic agent as Loa loa. The patient received antithrombotic and antiparasitic therapy. This is, to our knowledge, the first reported case of thrombosis of the Ulnar Veins associated with Loa loa.
Søren Petersen - One of the best experts on this subject based on the ideXlab platform.
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Thrombosis of the Ulnar Veins : an unusual manifestation of Loa loa filariasis
Scandinavian journal of infectious diseases, 1998Co-Authors: Søren Petersen, Jens Rønne-rasmussen, Peter BasseAbstract:A 49-y-old male, who had travelled in Central Africa, was admitted to hospital with oedema of the right forearm. He was diagnosed as having thrombosis of the Ulnar Veins. Subsequently eosinophilia and positive serology for filariae established the aetiologic agent as Loa loa. The patient received antithrombotic and antiparasitic therapy. This is, to our knowledge, the first reported case of thrombosis of the Ulnar Veins associated with Loa loa.
Jens Rønne-rasmussen - One of the best experts on this subject based on the ideXlab platform.
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Thrombosis of the Ulnar Veins : an unusual manifestation of Loa loa filariasis
Scandinavian journal of infectious diseases, 1998Co-Authors: Søren Petersen, Jens Rønne-rasmussen, Peter BasseAbstract:A 49-y-old male, who had travelled in Central Africa, was admitted to hospital with oedema of the right forearm. He was diagnosed as having thrombosis of the Ulnar Veins. Subsequently eosinophilia and positive serology for filariae established the aetiologic agent as Loa loa. The patient received antithrombotic and antiparasitic therapy. This is, to our knowledge, the first reported case of thrombosis of the Ulnar Veins associated with Loa loa.
Nicolo Scuderi - One of the best experts on this subject based on the ideXlab platform.
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Ulnar artery thrombosis and nerve entrapment at guyon s canal our diagnostic and therapeutic algorithm
in Vivo, 2010Co-Authors: Giampaolo Monacelli, Maria Ida Rizzo, A M Spagnoli, Cristiano Monarca, Nicolo ScuderiAbstract:Hypothenar hammer syndrome is a rare condition of Ulnar artery aneurysm or thrombosis, which can be associated with a neuropathy of the Ulnar nerve. There is no agreement regarding an optimal diagnosis and treatment for this syndrome. Most authors suggest angiography as the gold standard for diagnosis and recommend observation for the thrombotic type, and reconstructive surgery for the aneurysmal type. We report here our diagnostic and therapeutic algorithm, reviewing 9 patients with Ulnar artery thrombosis and nerve entrapment at Guyon's canal; and an evaluation of the type of management including: anamnesis, diagnostic tests, and reconstructive surgery. We consider resection of the arterial thrombotic segment as the treatment of choice, due to the fact that Ulnar arterial thrombosis can induce severe chronic inflammation into Guyon's canal and Ulnar nerve sufferance. Therefore, we propose a planned approach, including 3 steps: clinical evaluation with Tinel and Allen's tests; magnetic resonance and ultrasound images; Ulnar nerve decompression and arterial reconstruction. We believe that this practice is important for the early therapy of Ulnar arterio-neuropathy in affected patients. Hypothenar hammer syndrome (HHS) describes a rare condition of aneurysm or thrombosis of the Ulnar artery that is usually the result of repetitive trauma to the hypothenar region. According to the literature, treatment options include watchful observation for the thrombotic type and reconstructive surgery for the aneurysmal type (1). We would like to report our clinical experience with Ulnar neuropathy and artery thrombosis in the presence of associated HHS and Guyon's canal syndrome and the successful surgical procedures. These syndromes are two distinct pathologic entities that most often occur separately in the hypothenar eminence; however, they may also be associated, and, in that case, they are more difficult to diagnose (2). Guyon's canal is a fibro-osseus tunnel located along the anteromedial portion of the wrist. It is not a rigid conduit but rather a space of varying dimensions that conducts the Ulnar neurovascular bundle through the wrist. The Ulnar nerve lies between the pisiform bone and the Ulnar Veins and artery. Because of its anatomic position, the Ulnar nerve is subject to entrapment and injury. The wrist (Guyon's canal) is the second most common site of Ulnar nerve entrapment, also referred to as nerve compression syndrome. Possible causes of Ulnar entrapment neuropathy at Guyon's canal include ganglia, lipomas, cysts, anomalies of ligaments or muscles, and fractures of the radius or pisiform bone or hook of the hamate. Ulnar entrapment may also be due to arterial compression. Segmental Ulnar neuropathy has been reported as a result of Ulnar nerve compression due to post-traumatic false aneurysms, thrombosis, true aneurisms, or tortuous distal Ulnar artery (2- 6). Lastly, Guyon's canal syndrome can also be the result of repetitive strain injury (7). HHS is caused by blunt repetitive injury to the Ulnar artery and superficial palmar arch from impact against the hamulus. Typically, the resultant trauma to the hypothenar eminence is chronic. Because of the anatomic configuration of the Guyon canal, the Ulnar artery is particularly vulnerable to mechanical injury due to its entrapment between a hammer (external force) and an avil (the hamulus). Intimal hyperplasia is almost invariability present in HHS, along with duplication and fragmentation of the internal elastic lamina. Arterial wall damage may lead to aneurism formation with or without vessel thrombosis and to microemboli formation and compression of the sensory branch of the Ulnar nerve (2, 8-10). The aim of this report is to present nine cases of Ulnar entrapment neuropathy due to Ulnar arteriopathy at Guyon's canal, and to suggest an algorithm of diagnosis and treatment for the early identification and recovery from Ulnar nerve compression.
Giampaolo Monacelli - One of the best experts on this subject based on the ideXlab platform.
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Ulnar artery thrombosis and nerve entrapment at guyon s canal our diagnostic and therapeutic algorithm
in Vivo, 2010Co-Authors: Giampaolo Monacelli, Maria Ida Rizzo, A M Spagnoli, Cristiano Monarca, Nicolo ScuderiAbstract:Hypothenar hammer syndrome is a rare condition of Ulnar artery aneurysm or thrombosis, which can be associated with a neuropathy of the Ulnar nerve. There is no agreement regarding an optimal diagnosis and treatment for this syndrome. Most authors suggest angiography as the gold standard for diagnosis and recommend observation for the thrombotic type, and reconstructive surgery for the aneurysmal type. We report here our diagnostic and therapeutic algorithm, reviewing 9 patients with Ulnar artery thrombosis and nerve entrapment at Guyon's canal; and an evaluation of the type of management including: anamnesis, diagnostic tests, and reconstructive surgery. We consider resection of the arterial thrombotic segment as the treatment of choice, due to the fact that Ulnar arterial thrombosis can induce severe chronic inflammation into Guyon's canal and Ulnar nerve sufferance. Therefore, we propose a planned approach, including 3 steps: clinical evaluation with Tinel and Allen's tests; magnetic resonance and ultrasound images; Ulnar nerve decompression and arterial reconstruction. We believe that this practice is important for the early therapy of Ulnar arterio-neuropathy in affected patients. Hypothenar hammer syndrome (HHS) describes a rare condition of aneurysm or thrombosis of the Ulnar artery that is usually the result of repetitive trauma to the hypothenar region. According to the literature, treatment options include watchful observation for the thrombotic type and reconstructive surgery for the aneurysmal type (1). We would like to report our clinical experience with Ulnar neuropathy and artery thrombosis in the presence of associated HHS and Guyon's canal syndrome and the successful surgical procedures. These syndromes are two distinct pathologic entities that most often occur separately in the hypothenar eminence; however, they may also be associated, and, in that case, they are more difficult to diagnose (2). Guyon's canal is a fibro-osseus tunnel located along the anteromedial portion of the wrist. It is not a rigid conduit but rather a space of varying dimensions that conducts the Ulnar neurovascular bundle through the wrist. The Ulnar nerve lies between the pisiform bone and the Ulnar Veins and artery. Because of its anatomic position, the Ulnar nerve is subject to entrapment and injury. The wrist (Guyon's canal) is the second most common site of Ulnar nerve entrapment, also referred to as nerve compression syndrome. Possible causes of Ulnar entrapment neuropathy at Guyon's canal include ganglia, lipomas, cysts, anomalies of ligaments or muscles, and fractures of the radius or pisiform bone or hook of the hamate. Ulnar entrapment may also be due to arterial compression. Segmental Ulnar neuropathy has been reported as a result of Ulnar nerve compression due to post-traumatic false aneurysms, thrombosis, true aneurisms, or tortuous distal Ulnar artery (2- 6). Lastly, Guyon's canal syndrome can also be the result of repetitive strain injury (7). HHS is caused by blunt repetitive injury to the Ulnar artery and superficial palmar arch from impact against the hamulus. Typically, the resultant trauma to the hypothenar eminence is chronic. Because of the anatomic configuration of the Guyon canal, the Ulnar artery is particularly vulnerable to mechanical injury due to its entrapment between a hammer (external force) and an avil (the hamulus). Intimal hyperplasia is almost invariability present in HHS, along with duplication and fragmentation of the internal elastic lamina. Arterial wall damage may lead to aneurism formation with or without vessel thrombosis and to microemboli formation and compression of the sensory branch of the Ulnar nerve (2, 8-10). The aim of this report is to present nine cases of Ulnar entrapment neuropathy due to Ulnar arteriopathy at Guyon's canal, and to suggest an algorithm of diagnosis and treatment for the early identification and recovery from Ulnar nerve compression.