You might wonder why I am printing these papers. Coincident to other tests that I had over the holidays, we have found a number of enlarged lymph nodes and other masses which just showed up on the CT scans. I furously began reserching this issue and found the following papers. Frankly, this is the best news that I have found. It would appear that a number of these masses do appear and are mistaken for cancerous lesions. This is the good news: "mistaken for cancerous lesions." Turns out these masses are filled with metal debris from the hip replacements. I hope that is the case with me as well! Will keep you posted.
I just thought if others have found this to be the case in follow up scans, these papers might be of use. I have had a few frightening weeks and these papers provide a different perspective other than just cancerous lesions.
Sinus histiocytosis of pelvic lymph nodes after hip replacement. A histiocytic proliferation induced by cobalt-chromium and titanium.
SourceDepartment of Pathology, University of Texas Southwestern Medical Center, Texas, Dallas 75235-9072.
AbstractSix men who had undergone hip replacements for degenerative joint disease or trauma subsequently had radical prostatectomies or cystoprostatectomies with bilateral pelvic lymph node dissections for adenocarcinoma of the prostate or transitional cell carcinoma of the urinary bladder. The hip prostheses implanted in three patients were known to contain cobalt-chromium alloy and titanium. The pelvic lymph nodes ipsilateral to the hip prosthesis in five patients and the bilateral pelvic nodes in the only patient with bilateral hip prosthesis had dark brown or black cut surfaces. These lymph nodes did not contain carcinoma but showed florid sinus histiocytosis characterized by large polygonal histiocytes filling and expanding sinuses and interfollicular regions. The foamy histiocytes contained cobalt-chromium and titanium microparticles by light microscopy, ultrastructure, and energy-dispersive x-ray microanalysis. The lymph nodes uninvolved by the histiocytic reaction lacked the heavy metal microparticles. Four cases were found to have a small number of polyethylene particles, which might have contributed to the histiocytic response. By immunohistochemistry, the foamy cells displayed immunoreactivity for lysozyme, alpha-1-antitrypsin, alpha-1-antichymotrypsin, and cathepsin D, providing additional support for their histiocytic derivation. To our knowledge, this is the first time that microparticles of cobalt-chromium and titanium that migrate from hip prostheses to pelvic lymph nodes have been shown to elicit a distinctive type of florid sinus histiocytosis. Pathologists should be aware of this characteristic foreign-body tissue response to avoid confusion with other types of sinus histiocytosis or with metastatic carcinoma.
In medicine, histiocytosis refers to an excessive number of histiocytes, (tissue macrophages), and is typically used to refer to a group of rare diseases which share this as a characteristic. Occasionally and confusingly, the term "histiocytosis" is sometimes used to refer to individual diseases.
The histiocytes may attack skin, bone, muscles, and other important organs, including the liver, lung, spleen, and hematopoietic system. The disease is somewhat similar to cancer, and treatment often involves radiation and chemotherapy
Acta Cytol. 2003 Mar-Apr;47(2):270-4.
Chromium-induced lymph node histiocytic proliferation after hip replacement. A case report.
SourceDepartment of Pathology, Rambam Medical Center, Department of Pathology, B. Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
BACKGROUND:Prosthetic joint replacement is frequently used for the treatment of degenerative joint disease, rheumatoid arthritis, bone tumors and traumatic lesions. The prostheses contain such materials as titanium, cobalt and chromium. We describe a patient who, after total hip arthroplasty, developed an inguinal-pelvic mass. Fine needle aspiration revealed metallic particles, also seen on light microscopy in reactive pelvic lymph nodes. Ultrastructure was consistent with the presence of foreign particles, while energy dispersive x-ray microanalysis established the presence of chromium. To our knowledge, this is the first report of chromium-related lymph node metallosis diagnosed by fine needle aspiration.
CASE:Eight years after total hip arthroplasty, a 78-year-old woman developed a right pelvic cystic mass. Aspiration drainage was performed. Smears from fine needle aspiration showed numerous macrophages with abundant, foamy cytoplasm and round nuclei without atypia. Small, birefringent particles were seen in the cytoplasm. Histopathology showed fibroconnective tissue with chronic inflammation and marked lymph node sinus histiocytosis. Within histiocytes, numerous particles were present, identical to those seen in the smears. Their nature as "foreign bodies" was confirmed by electron microscopy, and the presence of chromium was shown by energy dispersive x-ray analysis.
CONCLUSION:Fine needle aspiration and polarized microscopy are excellent techniques to evaluate foreign materials in lymph nodes draining the sites of joint prostheses, thus precluding confusion with other conditions, such as metastatic carcinoma.
Lymphadenopathy associated with total joint prostheses. A report of two cases and a review of the literature.
SourceHarvard Medical School, Boston, Massachusetts 02115, USA.
Lymphadenopathy is a term meaning "disease of the lymph nodes." It is, however, almost synonymously used with "swollen/enlarged lymph nodes". It could be due to infection, auto-immune disease, or malignancy