Key words

IJNM

Indian Journal of Nuclear Medicine

0972-3919

Society of Nuclear Medicine, India

ijnm-22-4-049

RESEARCH ARTICLE

PET/CT in Anorectal Melanoma Initial Experience

Arora

Shah

Pathak

Sujata

Sharma

A R

Purandare

N C

Rangarajan

Bioimaging Unit, Tata Memorial Hospital, Parel, Mumbai.

122007

224

Key wordsFDGPET-CTAnorectal Melanoma

Aims

Primary Anorectal melanomas are rare. Treatment approach is surgical with a local excision to a regular AP resection. Involvement of liver is a contraindication for surgery and a palliative approach is made. There is hardly any report on the use of PET/CT in the evaluation of Anorectal melanoma. Our aim is to examine the utility of PET/CT in Anorectal melanomas.

Material & Methods

A retrospective study was done on the patients with Anorectal melanomas who had PET/CT study. PET/CT was done in dedicated 16 slice CT/BGO plus full ring system. Patients received a minimum of 10mci 18F FDG and were imaged after uptake period of 1 hour.12 patients were studied.

Observation

7 patients were studied as pre operative assessment and five were studied in the post surgery period. In the pre operative assessed group of patients, PET/CT detected metabolic activity in the primary site in all the patients (Max SUV 4–33). Local nodes (common, internal, external iliac, sacral) with metabolic activity were detected in six patients.Distant metastases liver involvement were seen in 3 patients and lung involvement was noted in 2 patients. Among the five patients studied in the post surgery period, metabolic disease was detected in the local site suggesting local recurrence in four patients. Distant metastases were seen in four patients.

Conclusion

PET/CT evaluation in Anorectal Ca patients changed the planned treatment in seven out of twelve patients. Hence this investigation when available should be offered to all patients of Anorectal melanoma.

PET/CT in Anorectal Melanoma Initial Experience

Keywords