title: Male pelvic squamous cell carcinoma of unknown primary origin.
abstract: Pelvic squamous cell carcinoma of unknown primary origin has been described in several case reports of female patients. However, there have been no published reports describing male patients with pelvic squamous cell cancer of unknown primary origin. Our case describes a 52-year-old man who presented with right buttock pain, rectal urgency, and constipation. His physical examination demonstrated tenderness to palpation around his gluteal folds. Computed tomography scan of his abdomen and pelvis demonstrated a large mass in his retroperitoneum. The mass was determined to be squamous cell carcinoma of unknown primary origin. Additionally, the patient had small nodules in his right lower lung lobe and right hepatic lobe. The patient was treated with concomitant chemoradiation, including cisplatin and intensity-modulated radiation therapy, followed by carboplatin and paclitaxel. The patient achieved partial remission, in which he remained one year after his presentation. Our case is consistent with the literature which suggests that squamous cell carcinoma of unknown primary origin occurring outside of the head and neck region may have a more favorable prognosis than other carcinomas of unknown primary origin. Further studies are necessary to determine the most appropriate work-up, diagnosis, and optimal treatment strategies.
authors.affiliation: University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
authors.forename: Lauren
authors.identifier: 0000-0003-4347-1438
authors.initials: L
authors.lastname: Chiec
authors.affiliation: Division of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
authors.forename: Sadhna
authors.initials: S
authors.lastname: Verma
authors.affiliation: Division of Pathology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
authors.forename: Ady
authors.initials: A
authors.lastname: Kendler
authors.affiliation: The Vontz Center for Molecular Studies, 3125 Eden Avenue, RM 1312, ML 0562, Cincinnati, OH 45267, USA.
authors.forename: Nagla
authors.identifier: 0000-0001-5112-5100
authors.initials: N
authors.lastname: Abdel Karim