<p>Subcutaneous panniculitis-like T-cell lymphoma is a distinct entity of cutaneous malignant lymphoma. We report an atypical presentation of subcutaneous panniculitis-like T-cell lymphoma in a 3-month-old infant, incidentally diagnosed with a right chest wall mass devoid of ulceration, tenderness, or systemic symptoms (fever). Due to unresectability, the child underwent five cycles of chemotherapy. This rare case highlights the importance of considering subcutaneous panniculitis-like T-cell lymphoma in young patients with image findings suggestive of subcutaneous fat involvement. Timely diagnosis via recognition and biopsy is paramount for guiding management strategies.</p>