case_images: PMC9896428_01
case_images: MRI of the knee. The MRI was suggestive of synovial thickening (white arrow) and collections in lower thigh soft tissue ( ). Also, there is extensive soft tissue edema around the knee joint and lower thigh region (curved arrow).
case_images: cureus-0015-00000033342-i01.jpg
case_images: PMC9896428_01_cureus-0015-00000033342-i01.jpg
case_images: FIG1
case_images: Also, there was extensive soft tissue edema around the knee joint and lower thigh region (Figure 1).
case_images: PMC9896428_02
case_images: The KOH mount (40x) showed thin, hyaline, branched, septate hyphae.. KOH: Potassium hydroxide
case_images: cureus-0015-00000033342-i02.jpg
case_images: PMC9896428_02_cureus-0015-00000033342-i02.jpg
case_images: FIG2
case_images: The direct potassium hydroxide (KOH) mount was positive for fungus wherein septate hyphae were seen (Figure 2). 
case_images: Histopathological examination images. The histopathological examination was suggestive of fragments of synovial tissue with chronic inflammatory cell infiltrate (a), along with acute inflammatory exudate (b) and granulation tissue (c).
case_images: cureus-0015-00000033342-i03.jpg
case_images: PMC9896428_02_cureus-0015-00000033342-i03.jpg
case_images: FIG3
case_images: The histopathological examination was showing fragments of synovial tissue with chronic inflammatory cell infiltrate along with acute inflammatory exudate and granulation tissue (Figure 3).
case_images: PMC9896428_03