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Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
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The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
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Elastofibroma dorsi.

Pradeep Goyal1, Darshan Gandhi1, Sonali Gupta1

  • 1Department of Radiology, St. Vincent's Medical Center, Bridgeport, Connecticut (Goyal, Gandhi, S. Gupta, Olsavsky, N. Gupta); and the Department of Radiology, Yale New Haven Health at Bridgeport Hospital, Bridgeport, Connecticut (Li, Kumar, Olsavsky).

Proceedings (Baylor University. Medical Center)
|July 4, 2017
PubMed
Summary
This summary is machine-generated.

A benign tumor, elastofibroma dorsi, can mimic malignancy on PET-CT scans. This case highlights its typical location and imaging features, preventing misdiagnosis of soft tissue sarcoma.

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Area of Science:

  • Oncology
  • Radiology
  • Pathology

Background:

  • Metastatic squamous cell carcinoma presents diagnostic challenges, especially with an unknown primary.
  • Positron emission tomography-computed tomography (PET-CT) is crucial for staging and monitoring cancer treatment.
  • Soft tissue masses require accurate differentiation between benign and malignant entities.

Observation:

  • A 60-year-old man with metastatic squamous cell carcinoma developed hypermetabolic subscapular masses post-treatment.
  • Biopsy of the right subscapular mass revealed elastofibroma dorsi, a benign tumor.
  • Elastofibroma dorsi exhibits characteristic uptake on PET-CT.

Findings:

  • Elastofibroma dorsi can present as an incidental hypermetabolic mass on PET-CT.
  • The typical location is the subscapular region.
  • Histopathology confirmed elastofibroma dorsi, ruling out malignancy.

Implications:

  • Accurate interpretation of PET-CT is vital to avoid misdiagnosing benign conditions like elastofibroma dorsi as soft tissue sarcoma.
  • Understanding the imaging features of elastofibroma dorsi can improve diagnostic accuracy in oncology.
  • This case underscores the importance of integrating imaging findings with biopsy results for definitive diagnosis.