PMC9699853_01
(a) Paucicellular smear with a few spindle cells (MGG, x400). (b) with eosinophilic collagen-like material (MGG, x400). (c) Gross: Skin-covered soft tissue with 10 cm nodule. (d) Hyperkeratotic stratified squamous epithelium with large dense bundles of glassy collagen in mid to deep dermis showed (H & E, x100). Inset: Masson's trichrome stain highlights the thick collagen bundles in the mid-dermis (x200).
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F1
Grossly, it measured 10 cm in maximum dimension, and externally, it was skin-covered [Figure 1c]. Mid to deep dermis showed large dense bundles of glassy collagen [Figure 1d].