Singh Amrit P, Murray Glenn P, Pandey Soumya
Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
Case Rep Pathol. 2020 Jul 2;2020:4674103. doi: 10.1155/2020/4674103. eCollection 2020.
Histiocyte-rich pseudotumors (HRPT) developing postchemoradiation therapy are a florid response to treatment and reparative change. Although these are benign processes, clinically and radiologically, these may mimic recurrent/relapsed disease. We describe a case of an adult male with history of diffuse large B-cell lymphoma (DLBCL), status postchemoradiation therapy, who developed HRPT at the site of original involvement, mimicking relapse of disease on positron emission tomography/computed tomography (PET/CT) imaging. This is one of the few reported cases of posttreatment HRPT. This entity is important to point out the limitations of PET/CT imaging in patients with lymphomas and metastatic disease and stresses the importance of an excisional biopsy for determining relapse and the need for further treatment.
放化疗后出现的富含组织细胞的假瘤(HRPT)是对治疗的一种显著反应及修复性改变。尽管这些是良性过程,但在临床和放射学上,它们可能酷似复发/再发疾病。我们描述了一例成年男性,有弥漫性大B细胞淋巴瘤(DLBCL)病史,放化疗后,在原受累部位出现HRPT,在正电子发射断层扫描/计算机断层扫描(PET/CT)成像上酷似疾病复发。这是为数不多的报道的治疗后HRPT病例之一。指出这个实体对于明确PET/CT成像在淋巴瘤和转移性疾病患者中的局限性很重要,并强调了切除活检对于确定复发及进一步治疗需求的重要性。