Lymphoscintigraphy for Peri-Anal Squamous Cell Carcinoma: A Case Report of an Atypical Location for Sentinel Lymph Node.

This case report describes a 41-year-old man with a progressively enlarging, painful vegetative lesion in the perianal region, ultimately diagnosed as squamous cell carcinoma (SCC), through a punch biopsy. Sentinel lymph node (SLN) mapping was performed via preoperative lymphoscintigraphy utilizing 99mTc-Phytate. Notably, an SLN was identified in an atypical location, below the anterior superior iliac spine (ASIS) in the subcutaneous tissue, diverging from typical drainage patterns associated with perianal SCC.

Radiotracer Accumulation in the Pyelocaliceal System of Transplanted Kidney: A Potential Pitfall in Lymphoscintigraphy of Pelvic Malignancies.

A 34-year-old woman with a history of renal transplantation and cervical cancer underwent lymphoscintigraphy using 99mTc-phytate before surgery. Initial planar images revealed multiple foci of uptake, which were later precisely localized using SPECT/CT imaging. Notably, uptakes in the right lower quadrant were attributed to the pyelocalyceal system of the transplanted kidney, highlighting a potential pitfall in patients with ectopic or transplanted kidneys.