Psoas as an Unusual and Overlooked Place for a Metastatic Tumor

Abstract

We report a case of a 60-year-old hemodialysis patient who clinically mimicked psoas abscess, which was subsequently proven to be from metastatic disease seconddary to uroepithelial tumor. The patient presented with 3 weeks history of fever, weight loss and back pain. Computer tomography (CT) scan of abdomen and pelvis revealed psoas muscle infiltration not amenable to drainage by interventional radiology. Careful history to provide additional clues to the diagnosis is of paramount importance in this condition.

Compound Pelvic Muscle Metastasis in Laryngeal Carcinoma

“…According to the available literature, there are three important pathophysiological mechanisms that explain the causes of muscular metastasis. First proposed mechanism states that muscular metastases can develop by hematogenous spread through arterial vessels [8]. Second proposed mechanism states that malignant tumors can metastasize into the musculature via venous vessels, especially through the paravertebral venous plexus.…”

“…Although skeletal muscle is most abundant tissue in the body, metastasis is very rare with the prevalence from 0.03 to 17.5% [7]. The psoas muscle is less commonly associated with tumoral involvement and is more commonly linked to infectious processes such as abscess formation [8]. Early recognition and appropriate management are essential in these cases.…”