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Synthesis and Functions of Calcitonin00:51

Synthesis and Functions of Calcitonin

Calcitonin, a vital polypeptide hormone, regulates calcium levels within body fluids. It is released by the parafollicular cells, also known as C cells, situated in the follicular epithelium of the thyroid gland. Calcitonin responds to fluctuations in blood calcium levels and the influence of gastrointestinal hormones like gastrin and cholecystokinin.
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...
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Gross Anatomy of Bone01:17

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Synovial Fluid Analysis to Identify Osteoarthritis
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Synovial Fluid Analysis to Identify Osteoarthritis

Published on: October 20, 2022

Characterization of synovial sarcoma calcification.

Benjamin W Wilkerson1, Julia R Crim, Man Hung

  • 1Department of Radiology, University of Utah Health Sciences Center, 30 North 1900 East, 1AO71, Salt Lake City, UT 84132, USA. bwwilkerson@gmail.com

AJR. American Journal of Roentgenology
|November 22, 2012
PubMed
Summary

Fine, stippled calcifications in soft-tissue masses can indicate synovial sarcoma. These patterns may mimic other conditions, highlighting the need for careful diagnosis of soft-tissue tumors.

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Area of Science:

  • Radiology
  • Oncology
  • Pathology

Background:

  • Synovial sarcoma is a rare soft-tissue malignancy.
  • Calcification patterns in soft-tissue tumors can aid in diagnosis.
  • Distinguishing synovial sarcoma from other soft-tissue lesions is clinically important.

Purpose of the Study:

  • To characterize the diverse patterns of calcifications observed in synovial sarcoma.
  • To assess the diagnostic implications of these calcifications.

Main Methods:

  • Retrospective analysis of imaging findings in pathologically confirmed synovial sarcoma cases.
  • Detailed review of calcification morphology, distribution, and association with tumor characteristics.

Main Results:

  • Fine, stippled calcifications were a frequent finding, raising suspicion for synovial sarcoma.
  • Coalesced calcifications could mimic hydroxyapatite deposition disease or soft-tissue osteosarcoma.
  • Spiculated calcifications were less common but showed overlap with other sarcomas.

Conclusions:

  • The presence of fine, stippled calcifications is a key indicator for considering synovial sarcoma.
  • Radiologists and clinicians should be aware of the potential mimicry of other conditions by synovial sarcoma calcifications.
  • Understanding these patterns improves differential diagnosis in soft-tissue masses.