Demonstration of a tubercular fistula-in-ano on F-18 FDG PET/CT

Gunjan Garg, Madhavi Tripathi, Maria D'Souza, Abhinav Jaimini, Nikunj Jain, Aditi Khurana, Rajnish Sharma, Anupam Mondal

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A 53-year-old man diagnosed as a case of adenocarcinoma of the colon, was referred for a FDG-PET/CT after receiving 6 cycles of chemotherapy. On the maximum intensity projection image, a striking curvilinear pattern of FDG accumulation was seen extending postero-inferiorly in the pelvic region to the right side of the midline. This was localized to a curvilinear track of soft tissue attenuation arising from the anal canal, traversing through the right ischio-rectal fossa into the overlying skin in the natal cleft on the fused PET/CT image. On being questioned the patient confirmed of having a history of recurrent fistula-in-ano and had been operated twice for the same. The polymerase chain reaction for TB was positive and the patient was taking antitubercular treatment. In patients being evaluated for malignancies it is important to identify such benign, infective but clinically consequential lesions and the key to correct interpretation in such cases is a detailed history of the patient.

Original languageEnglish (US)
Pages (from-to)300-302
Number of pages3
JournalClinical nuclear medicine
Issue number4
StatePublished - Apr 2010
Externally publishedYes


  • Fistula-in-ano
  • Tubercular

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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