The stroma is predominantly collagenous. Characteristic wiry to ropey

Histopathological features of giant mediastinal tumors—a literature review - Brcic - Mediastinum

Cornea Stroma - an overview

Pseudosarcoma

Tumours composed of fat are no longer a simple diagnosis: an overview of fatty tumours with a spindle cell component

The broadening spectrum of spindle cell lipoma and related tumors: A review - ScienceDirect

Fibrous dysplasia with collagenized stroma. The cells in the stroma are

Fine-Needle Aspiration of Soft Tissue and Bone (Chapter 16) - Differential Diagnosis in Cytopathology

Tumours composed of fat are no longer a simple diagnosis: an overview of fatty tumours with a spindle cell component

Low‐fat and fat‐free spindle cell lipomas in the oral cavity: Immunohistochemical analysis and review of the literature - Rocha - 2019 - Journal of Cutaneous Pathology - Wiley Online Library

Fibrous and myofibroblastic tumors and reactive lesions (Chapter 6) - Pearls and Pitfalls in Neoplastic Dermatopathology

The stroma is predominantly collagenous. Characteristic wiry to ropey