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case_images: A,B, C: Magnetic resonance imaging depicting an elongated mass (blue asterisk) located in the right posterolateral thoracic wall, adjacent to the lower angle of the scapula. The mass (blue asterisk) displayed well-defined borders and a striated pattern, attributed to alternating linear structures with low signal intensity on T1 and T2 MRI sequences within a fatty background.
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case_images: T1 and T2 MRI sequences, set against a fatty background (Fig. 1A, B, and C). These findings were consistent with a diagnosis of ED.
case_images: A: Intraoperative photos depict the tumor bed after resection, exposing the ribs and the scapulothoracic space following the separation of the scapula without caudal angulation.. B: Macroscopic examination of the mass after complete excision, measuring 14 x 10 x 3 cm.
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case_images: The patient subsequently underwent complete surgical excision of the mass (Fig. 2A). The excised specimen weighed 352 g, measured 14 x 10 x 3 cm, and exhibited a rubbery consistency (Fig. 2B).
case_images: The cut surface displayed a gross appearance resembling layered leaves, with whitish fibrous tissue interspersed with streaks of yellow fatty tissue. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
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case_images: On the cut surface, the specimen displayed gray or whitish fibrous tissue interspersed with streaks of yellow fatty tissue, resembling layered leaves (Fig. 3).
case_images: A: Histological examination of elastofibroma dorsi reveals a lesion characterized by the presence of fibrocollagenous tissue. Within this tissue, eosinophilic elastic fibers and scattered fibroblasts are observed. Additionally, a variable amount of mature adipose tissue is dispersed throughout the fibrocollagenous matrix. (Hematoxylin and eosin, magnification x 100).. B: Microscopic examination reveals elastic fibers with a coarse texture, exhibiting an eosinophilic (pink-stained) appearance and fragmented morphology (black arrows). These fibers have the propensity to align linearly, forming either globular or serrated disk-like structures that bear a resemblance to beads on a string (black arrows). (Hematoxylin and eosin, magnification x 400). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
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case_images: Histopathological examination revealed an ill-defined proliferation of fibrocollagenous tissue containing numerous abnormal elastic fibers, along with scattered bland spindle cells mixed with adipose tissue (Fig. 4A). The elastic fibers were coarse, pink-stained, and fragmented, forming linearly arranged globular or serrated disk-like structures reminiscent of beads on a string (Fig. 4B).