Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Ribeirão Preto, Sao Paulo.
Dermatol Online J. 2020 Nov 15;26(11):13030/qt5qv7r84f.
We report a 7-year-old boy who presented with a nodule on the upper lip. A previous clinical history of mechanical trauma in the lesional area had been noted. After surgical excision, microscopy revealed fibrocollagenous fascicles associated with neurovascular bundles and skeletal striated muscle fibers in diffuse subepithelial distribution, suggesting rhabdomyomatous mesenchymal hamartoma. However, strict clinicopathological correlation favored a healing process with trapped striated skeletal muscle tissue. After three years of follow-up, an improvement in the aesthetic appearance of the upper lip was observed. To the best of our knowledge, a case of pseudo-rhabdomyomatous mesenchymal hamartoma has not been reported to date.
我们报告了一例 7 岁男孩，其在上唇出现一个结节。病变部位曾有机械性创伤的既往临床病史。手术切除后，显微镜下观察到纤维胶原束与神经血管束相关，并在弥漫性黏膜下分布中伴有骨骼肌条纹纤维，提示肌母细胞瘤性间叶性错构瘤。然而，严格的临床病理相关性提示存在伴有条纹状骨骼肌组织嵌压的愈合过程。经过 3 年的随访，观察到上唇的美学外观得到改善。据我们所知，目前尚未报道过假性肌母细胞瘤性间叶性错构瘤病例。
