Secondary Hypertrophic Osteoarthropathy


Article Author:
Rebanta Chakraborty


Article Editor:
Sandeep Sharma


Editors In Chief:
Susan Johnson
Alexandra Caley


Managing Editors:
Avais Raja
Orawan Chaigasame
Carrie Smith
Abdul Waheed
Khalid Alsayouri
Frank Smeeks
Kristina Soman-Faulkner
Trevor Nezwek
Radia Jamil
Patrick Le
Sobhan Daneshfar
Anoosh Zafar Gondal
Saad Nazir
William Gossman
Pritesh Sheth
Hassam Zulfiqar
Navid Mahabadi
Steve Bhimji
John Shell
Matthew Varacallo
Heba Mahdy
Ahmad Malik
Mark Pellegrini
James Hughes
Beata Beatty
Nazia Sadiq
Hajira Basit
Phillip Hynes
Tehmina Warsi


Updated:
6/9/2019 11:45:17 PM

Introduction

Hypertrophic osteoarthropathy (HOA) is a syndrome characterized by a combination of clinical findings of severe disabling arthralgia and arthritis, digital clubbing, and periostosis of tubular bones, with or without synovial effusion.[1]

With fibrovascular proliferation at the heart of the pathogenesis, it can occur as a primary familial autosomal dominant condition called pachydermoperiostosis. Much more commonly, it occurs as a secondary manifestation of pulmonary or extrapulmonary chronic diseases and malignancies. Hypertrophic osteoarthropathy associated with pulmonary pathology is also known as hypertrophic pulmonary osteoarthropathy (HPOA).[2] 

Etiology

Pierre Marie and Eugen von Bamberger first described the syndrome in 1890 and 1891. For this reason, secondary hypertrophic osteoarthropathy is also referred to as Pierre Marie- Bamberger syndrome. Marie first coined the term hypertrophic pulmonary osteoarthropathy, referring to the more prevalent association with pulmonary diseases like lung carcinoma, cystic fibrosis, or pulmonary tuberculosis. Ninety-five to 97% of reported cases of hypertrophic osteoarthropathy are of secondary origin.

The causes of secondary hypertrophic osteoarthropathy can be broadly divided into generalized with the symmetrical involvement of multiple bones and localized disease. The majority of generalized disease is of pulmonary origin; hence the name hypertrophic pulmonary osteoarthropathy (HPOA). There are, however, several diseases of extrapulmonary origin that can cause generalized secondary hypertrophic osteoarthropathy. 

Causes of Generalized Pleuro-Pulmonary HPOA[3]

  • Bronchogenic carcinoma
  • Metastatic disease
  • Mesothelioma
  • Solitary fibrous tumor of pleura
  • Cystic fibrosis
  • Pulmonary tuberculosis
  • Chronic infections
  • Pulmonary arteriovenous malformation
  • Sarcoidosis 

Causes of Generalized Extra-Pulmonary HPOA

Cardiac

  • Congenital cyanotic heart disease
  • Atrial myxoma
  • Infective endocarditis

Gastrointestinal

  • Polyposis
  • Cancer
  • Inflammatory bowel disease
  • Achalasia
  • Laxative abuse

Hepatobiliary[4]

  • Cirrhosis
  • Biliary atresia
  • Primary biliary cirrhosis
  • Wilson disease
  • Carcinoma
  • Primary sclerosing cholangitis

Miscellaneous

  • Thymoma
  • POEMS syndrome
  • Myelofibrosis
  • Hematological malignancy

Causes of Localized HPOA [5]

  • Infected vascular graft
  • Infected arteritis
  • Patent ductus arteriosus
  • Aneurysms

Epidemiology

No racial or sexual predominance is seen. The common age of presentation is 55 to 75 years.

Ninety percent of reported hypertrophic osteoarthropathy is associated with malignancy. Non-small cell lung cancer (NSCLC), specifically adenocarcinoma, is the most common cause of secondary hypertrophic osteoarthropathy, reported as between 0.7% and 17%. Although lower in absolute incidence, a higher percentage of pleural tumors result in hypertrophic osteoarthropathy (22% of solitary fibrous tumor of pleura compared to 5 % of NSCLC).[6][7]

Pathophysiology

The etiopathogenesis of secondary hypertrophic osteoarthropathy has been largely attributed to either a neurogenic pathway or a vascular pathway triggered by circulating growth factors. The vascular pathway can be classified into two subtypes: (1) hypersecretion of vasoactive agents by the tumor itself or hypoxemia and (2) the mechanical release of vasoactive agents in systemic circulation due to arteriovenous shunting within the pulmonary circulation.

A neural reflex triggered by the affected organs with vagal innervation results in vasodilatation and increased blood circulation to the extremities, leading to the clinical manifestations. Chemical and surgical vagotomy have achieved symptom suppression with varying level of success.

Alternatively, a hypoxemia-driven surge of circulating growth factors, like platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), or prostaglandin E2 (PGE2) have also been proven to incite the triad of changes, including clubbing, effusion of small joints, and periostosis of tubular bones.[8] The function of PDGF includes stimulation of endothelial, smooth muscle proliferation, vascular permeability, and chemotaxis of neutrophils. Similar to PDGF, VEGF is also derived from platelets and stimulates angiogenesis. Newly formed immature vessel walls tend to be more permeable. At the tissue level, VEGF induces vasodilatation, vascular hyperplasia, interstitial edema and collagen deposition. Connective tissue proliferation in the outer margin of bones elevates the periosteum and deposits new osteogenic matrix underneath. In addition, VEGF also has a direct effect on osteoblasts and osteoclasts. Silveri et al., as well as multiple other studies, demonstrate overexpression of PDGF and VEGF in hypertrophic osteoarthropathy patients in comparison to healthy subjects. When concurrent with malignancies, removal of primary tumors also results in a decline of these levels. In the presence of pathological intracardiac or intrapulmonary shunt, the megakaryocytic precursor of platelets bypass fragmentation in the pulmonary circulation and enter into systemic circulation instead. This aberrant entry of circulating factors in systemic circulation in the presence of pulmonary shunt was first hypothesized by Dickenson and Martin in 1987. The release of PDGF from entrapped platelet fragments at the capillary level promotes hypervascularization as well as fibroblast activity. Paraneoplastic hypersecretion of VEGF by bronchogenic carcinoma as well as pleural fibrous tumor also results in a similar surge of their function.

Genomic studies also support a role of prostaglandin E2 in the pathogenesis of primary hypertrophic osteoarthropathy. Families with primary hypertrophic osteoarthropathy often carry homozygous and compound heterozygous mutations in 15 hydroxyprostaglandin dehydrogenase encoding gene HPGD, which is the key enzyme for platelet degradation. There is a resultant high circulating level of PGE2 and its metabolite PGEM. However, PGE2 is presumed to have more of an indirect role in secondary hypertrophic osteoarthropathy, acting as a facilitator to VEGF expression, particularly in bones and joints.[9]

Patients with congenital cyanotic heart diseases of myriad forms, have a common histological feature of a pleomorphic platelet population, of giant macrothrombocytes with aberrant volume distribution curves. They also tend to have glomerular enlargement with entrapped megakaryocytic nuclei, as well as a high circulating level of von Willebrand factor antigen. All these experimental models allude to activation of platelets and endothelial cells as the primary histologic mechanism with subsequent release of growth factors as a secondary step, leading to the common clinical manifestations.

A somewhat different, but well-demonstrated, pathology is seen in vascular graft infection-associated hypertrophic osteoarthropathy, where the bacteria adherent to graft releases certain endotoxins and vasoactive agents.[5]

Histopathology

Structural damage to vessel integrity is confirmed by certain electron microscopic findings including the presence of Weibel–Palade bodies, prominences of Golgi complexes, activated endothelia, reduplicated capillary basement membranes, and perivascular infiltrate. Even at the level of joints, synovial cell proliferation is minimal, but pathologic changes are dominated by arterial wall thickening with deposition of electron-dense material.[10]

History and Physical

Affected patients can present at any point in a continuum of symptom complexes, from asymptomatic to a classic triad of clubbing, periostosis, and synovial effusions.

Characteristically, malignancy patients complain of a deep-seated burning sensation of digits in early forms to the excruciating pain of lower extremity long bones, aggravated in a dependent position in later stages. Bone and joint pain often mislead to a diagnosis of inflammatory arthritis. Often the classical history suggests a poor response to opioid agents and encouraging response to NSAIDs. Joint involvements are typically bilaterally symmetrical and are characterized by effusion without inflammatory cellular infiltrate or synovial membrane hypertrophy. Symptoms related to the primary organ dysfunction are also often the diagnostic cues including new onset cough, hemoptysis, weight loss in lung malignancies, exophthalmos and myxedema in Graves disease, stigmata of chronic liver disease, or biliary disease.

Evaluation

Physical examination reveals some characteristic findings. Clubbing with "drumstick" appearance of the nailbeds are identifiable by meticulous digital exam. Convex nail with shiny overlying skin and loss of normal crease renders the characteristic appearance to both fingers and toes, although toes are more difficult to appreciate due to normal splaying of toe tips.

Clubbing may be the only clinical manifestation, although secondary hypertrophic osteoarthropathy may present with cylindrical swelling of the legs known as "elephant" legs. Thickening of long bones may be evident in nonmuscular locations like ankles and wrists.

Large joint effusion is more common in knee and wrists. Arthrocentesis yields a pauci-inflammatory fluid with less than 500 WBC, but with a tendency to clot spontaneously. Effusions are considered to be a sympathetic response to periostosis in the vicinity.

Clinical diagnosis is often challenging as the symptom complex on presentation can be very similar to connective tissue diseases. To complicate things further, there are reports of HPOA associated with lung malignancy which presented with elevated ANA and anti-Sm antibody levels. There are reported cases of positive ANCA serology as well. There are no specific serological markers of HOA. However, there is indirect evidence of increased circulating bone formation markers like bone alkaline phosphatase, osteocalcin or amino-terminal propeptide of type 1 procollagen. With a limited scope of this marker in routine clinical practice, diagnosis of HPOA is often delayed although HPOA appears early in the course of lung malignancy.[11]

Imaging is the mainstay of diagnosis. Symmetrical periostosis, in the absence of cortical destruction or fracture, is the hallmark of radiological findings. It characteristically involves shafts of tubular bones, initially limited to diaphysis (epiphyseal involvement is more common in primary HOA). With progression, metaphysis is also involved. There is an initial monolayer circumferential widening without transformation of bone shape, followed by multilayered, laminated, centripetal thickening with an irregular appearance in advanced stages. Tibia, fibula, radius, and ulna are most commonly affected, followed by phalanges.[12]

Long-standing clubbing can cause osseous resorption at terminal phalanges. In addition, tuftal overgrowth is seen in malignancy-associated HOA, first in toes and then in fingers.

MR imaging usually shows a low to intermediate signal intensity on T1 and T2 weighted images, highlighting periosteal elevation and reaction. MRI also helps in identifying synovial effusions.

There are reports of diagnosis of hypertrophic pulmonary osteoarthropathy based on PET scan findings of irregular bilateral periosteal new bone formation with increased fluorodeoxyglucose (FDG) uptake. For the same reason, there is a possibility of an erroneous diagnosis of metastatic disease based on FDG avidity. [13]

Bone scintigraphy with technetium 99m (99mTc) methylene diphosphonate (MDP) is the gold standard and is a more sensitive test. In fact, early suspicion based on radiograph should prompt a radionuclide bone scan along with a search for primary etiology with thoracic imaging.[14]

Enhanced tracer uptake in a symmetric distribution along cortical margins of tubular bones in the bone scan, is described by “double stripe" or "tramline" sign. Digital clubbing also results in prominent tracer uptake. There is an immense utility of radionuclide scan as a marker of treatment response, as scintigraphic findings do resolve with successful treatment of underlying etiology.

Treatment / Management

Prognosis and treatment of secondary hypertrophic osteoarthropathy are understandably related to the primary etiology. Treatment strategy can be broadly classified as follows:

  1. Treatment of Primary Etiology[15]Definitive treatment is targeted at curing the underlying cause including surgical resection, definitive chemotherapy or radiofrequency ablation for primary lung malignancy, antimicrobial therapy as in pulmonary tuberculosis, or lung transplantation in cystic fibrosis. Beyond pulmonary etiology, treatment of liver disease with liver graft or orthoptic liver transplantation is well reported. Haux et al. reported the first successful treatment of hypertrophic osteoarthropathy in cholestatic cirrhosis with copper overload with liver graft. Surgical correction of cyanotic heart disease has been reported as early as 1982 by Frand et al. There are also reports of total esophagectomy achieving cure of hypertrophic osteoarthropathy in association with esophageal squamous cell carcinoma or leiomyoma. Unilateral hypertrophic osteoarthropathy from infected vascular graft is treated with surgical removal of prosthetic graft coupled with systemic antibiotic therapy. However, overall survival is only 58%. 
  2. Symptom SuppressionIt is somewhat more challenging to treat hypertrophic osteoarthropathy in cases where the primary etiology cannot be cured or treated. Considering the advanced stage of the underlying disease, the extent of symptoms in this subset of patients are also severe.[16][17]

Unilateral Vagotomy

Ipsilateral vagus nerve dissection resulting in symptom relief in HPOA in inoperable cases of primary lung malignancy was reported by Geoffrey Flavell in the 1950s and was later reconfirmed by Yacoub et al. in 1962. It was never universally adopted and lost favor subsequently, as the humoral theory of pathogenesis gained prominence. Less invasive targets for symptom control, therefore, appeared justified. However, the approach was revisited in 2006 by Ooi et al. in a patient with inoperable lung malignancy where HOA symptom control was successfully achieved by video-assisted thoracoscopic surgery (VATS) assisted truncal vagotomy.[18][19][20]

Adrenergic Blockade

A combination regimen of adrenergic antagonists with propranolol and phenoxybenzamine was reported to achieve symptom suppression in hypertrophic osteoarthropathy associated with small cell carcinoma lung, as reported by Readon et al. in 1976. The treatment response was objectively measured by improvement in the thermographic index as well as the functional ability, including ring size and grip strength.[21]

NSAIDS

Letts et al. published a case series of five infants with arthritis and periostitis following PGE2 infusion for patent ductus arteriosus. That aligned with subsequent reports of a robust response of hypertrophic osteoarthropathy symptoms to NSAIDs like indomethacin and ketorolac and COX-2 inhibitors like rofecoxib. In contrast, opioid analgesics were not nearly as effective. A PGE2-induced mechanism of hypertrophic osteoarthropathy was suggested, as rofecoxib suppressed cyclooxygenase 2 which is an inducer of the prostaglandin E2 pathway.

Octreotide

Johnson et al. first reported successful treatment of hypertrophic osteoarthropathy with 200 mcg of octreotide daily in a patient with squamous cell carcinoma lung. Angel Moreno Maroto et al. also reported pain relief with octreotide in a patient with cyanotic heart disease from Tetralogy of Fallot and pulmonary artery atresia. Apart from inhibition of endothelial proliferation through VEGF, octreotide also has a well-demonstrated role in inhibition of nociceptive neurons.[22]

Bisphosphonates

There have been several case reports of intravenous pamidronate and zoledronic acid achieving symptomatic relief of hypertrophic osteoarthropathy in bronchogenic carcinoma, as well as in metastatic breast carcinoma and cyanotic congenital heart disease. Therapeutic response was noted in terms of symptom suppression as well as the radiographic resolution of periostitis in the bone scan. The mechanism of action of the bisphosphonates traces them to a proven inhibition of circulating VEGF levels in plasma.[23]

Specific Inhibitors

VEGF circulating levels, as well as tissue expression, are enhanced in almost all cases of hypertrophic osteoarthropathy, irrespective of the primary etiology. It is only rational therefore that specific inhibitors of VEGF should inhibit the final common pathway and achieve symptom suppression. Therapeutic trials of combining Bevacizumab with conventional chemotherapy regimen in non-small cell lung cancer is underway. Similarly, isolated case reports from Japan suggest the reduction of periostitis in advanced lung malignancy, with use of erlotinib, an epidermal growth factor receptor tyrosine kinase inhibitor.[24][25]

Differential Diagnosis

Differential diagnosis based on radiological signs of multifocal periosteal reactions include thyroid acropathy, primary hypertrophic osteoarthropathy, hematological malignancy, Hypervitaminosis A, and a rare autosomal dominant disease entity named Camurati Engelmann disease or progressive diaphyseal dysplasia. Voriconazole has been reported to cause periostitis that often mimics findings typical of hypertrophic osteoarthropathy.[26] Inflammatory arthropathy, connective tissue diseases, and vasculitis-related arthropathy often can be the initial diagnosis before the actual diagnosis of hypertrophic osteoarthropathy is established.

Pearls and Other Issues

  • In an individual with a new, clinical diagnosis of clubbing and joint or bone pain, attention must be directed to chest imaging, even if asymptomatic.
  • In an individual with a known chronic disease like rheumatic heart disease or AV graft, new signs of hypertrophic osteoarthropathy should trigger a search for an emergent complication like an infection of the graft or endocarditis.
  • Bilaterally symmetrical involvement of appendicular skeleton characterizes hypertrophic osteoarthropathy, as opposed to metastatic disease which is usually unilateral, focal, and irregular, involving both axial and appendicular skeleton
  • Unlike inflammatory arthritis, joint effusion is pauci- or non-inflammatory and has involvement of adjoining bone.
  • Definitive clinical management is aimed at treating the underlying cause, although symptom control can be achieved reasonably well with NSAIDs, bisphosphonates, or octreotide.

 

Enhancing Healthcare Team Outcomes

Hypertrophic osteoarthropathy is best managed by a multidisciplinary team that includes oncology nurses. Secondary hypertrophic osteoarthropathy should be actively entertained in the differential of bone and joint pain and new-onset clubbing in a patient with known malignancy, chronic lung disease, liver disease, or cyanotic heart disease. Reciprocally, a new diagnosis of hypertrophic osteoarthropathy based on clubbing, periostitis, and arthropathy should always trigger a search for a primary cause. As opposed to inflammatory arthritis, both the joint and the adjacent bone are involved. Rheumatoid factor is absent usually, and if the synovial fluid is aspirated, it is noninflammatory. A technetium bone scan is the diagnostic imaging of choice. Treatment is best achieved by definitive treatment of the primary pathology wherever possible. Where the primary disease is noncurative, symptom suppression is achieved at varying degrees with bisphosphonates, COX-2 inhibitors, octreotide, and certain anticancer chemotherapies that target fibroblastic growth factors.

The outcomes for patients with hypertrophic osteoarthropathy depend on the cause. Cases associated with a malignancy usually have a poor outcome, despite treatment.


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Secondary Hypertrophic Osteoarthropathy - Questions

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An adult female with a history of chronic obstructive pulmonary disease and hypertension presents complaining of aching in her wrists and weight loss. On exam, she has erythema over her wrists and bilateral clubbing. Upper extremity x-ray shows periosteal thickening of the wrists. What is next exam to order?



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A 52-year-old white female with 40 pack year history of smoking, presents with a month-long history of burning sensation in both feet and fingers. For past two weeks, both her knee joints and legs appear swollen. She has clubbing on examination. She has also been losing weight for three months and has an occasional cough which she attributed to smoking. What should be the first diagnostic intervention in a primary care setting?



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A 65-year-old Asian male with known history of rheumatic mitral valve disease presents with a 1-week history of new-onset gnawing pain and swelling of both arms and wrist joints. He also has a high-grade fever for past four days with increased shortness of breath. According to his son, he is mildly confused since this morning. What would be the most obvious acute condition to suspect?



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What are the key differentiating features of periostitis in hypertrophic osteoarthropathy from metastatic lesions?



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A 45-year-old male with known diagnosis of non-small cell carcinoma lung had a newly diagnosed knee joint swelling and effusion with pain. An ultrasound-guided arthrocentesis was performed to rule out infection. What characteristics of the fluid will support a diagnosis of hypertrophic pulmonary osteoarthropathy?



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What is the diagnostic test of choice for secondary hypertrophic osteoarthropathy?



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A 65-year-old male with known GOLD stage 4 chronic obstructive pulmonary disease was diagnosed with unresectable stage 3b adenocarcinoma of the right lung. He was also diagnosed with hypertrophic pulmonary osteoarthropathy resulting in excruciating pain in both arms and elbow. What will be the medication of choice for symptom relief that has the best outcome?



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A 45-year-old male with known diagnosis of stage 1b non-small cell carcinoma right upper lung had a newly diagnosed knee joint swelling and effusion with pain. Arthrocentesis shows minimal WBCs in joint fluid. He also has grade 2 clubbing of fingers. What is the most definitive treatment of his knee joint symptoms?



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A 30-year-old man presents to the office with frequent episodes of pain and swelling of his hands and fingers. He has no known chronic lung or heart problems. He is a nonsmoker and does not use alcohol. Clinical examination showed significant digital clubbing with diffuse swelling of the hands and feet. A chest x-ray is normal. Blood work for autoimmune serologies came back negative. A bone scan reveals diffuse periostosis along the length of the epiphysis of metacarpals and phalanges of both hands. There was no evidence of bony destruction. Which of the following is the best initial therapy for his symptoms?



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A 55-year-old lady presents to the office with subacute onset pain and swelling of both knees and elbows. She has a history of hypertension, hyperlipidemia, and a recent diagnosis of a lung nodule which is undergoing further diagnostic workup. On examination, both knee joints appear swollen significantly. Her fingers also have a characteristic swan neck deformity. As a part of a detailed workup, she undergoes serological studies, technetium bone scan and a PET scan which was primarily ordered to evaluate the lung nodule. Which among the following findings would best help confirm her underlying diagnosis?



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A 65-year-old African American female has been admitted to the hospital with severe pain and swelling of both knee joints and wrist joints over the past one month. She has a low-grade fever but is otherwise hemodynamically stable. Lab work shows a white cell count of 12000/microL with normal liver and renal function. There is evidence of bilateral knee joint tenderness with effusion. She has been very active functionally in the past. Her medical history is significant for small cell carcinoma lung treated with chemoradiation three years ago. She had post-radiation fibrosis with secondary cavitation and was diagnosed with aspergilloma for which she has been on antifungal therapy for the past two months. A bone scan to evaluate the knee joints shows evidence of bilateral tibial periostitis with the involvement of epiphysis and diaphysis. Which of the following is the best initial therapy for this patient?



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A 65-year-old African American lady was recently diagnosed with small cell carcinoma right lung and is yet to start definitive therapy. Respiratory symptoms are minimal at present except for a nagging cough. For the past month, however, she has been complaining of back pain, and since last week she has intense pain in her legs. On examination, knee joints are significantly swollen. PET scan was done to stage her lung cancer and showed multiple high 2-[18F]fluoro-D-glucose (FDG) uptake spots in ribs, thoracic vertebra, and both tibia. The tibial lesions show no cortical destruction or distortion of bone architecture in bone scan. She really wants help with her leg pain so she can walk again. Which of the following is the best initial therapy for this patient?



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A 45-year-old Caucasian female presents to the hospital with new onset diffuse swelling and pain in both legs, wrist, and elbow. She had a similar episode a year back that resolved with pain medications. On examination, knee joints appear swollen but not warm. Her temperature is 38 C. White blood cell count is 13,000/microL. ESR and CRP are mildly elevated. A knee joint arthrocentesis shows WBC of 400/microL with negative microbial culture. Serology workup shows positive ANA titer. Chronic medical history is significant for hypertension, dyslipidemia, and a chronic lung disease that she cannot specify. Home medications include hydralazine, amlodipine, albuterol, hydrochlorothiazide, and atorvastatin. Which among the following investigations would be most helpful in confirming her underlying disease process?



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Secondary Hypertrophic Osteoarthropathy - References

References

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