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  Indian J Med Microbiol
 

Figure 5: A 45-year-old male with multinodular goiter s/p total thyroidectomy and right neck dissection. Histopathology was reported as papillary thyroid carcinoma – conventional type treated with 120 mCi of 131I. Four months later developed small painless, purple-colored skin nodules. Whole body FDG PET/CT was suggested. Images showed focal FDG avidity in multiple intramuscular deposits (left 6th intercostal space, left gluteus intermedius, paravertebral muscle on left side at level of L4/L5, right pectoralis major anterior to 3rd rib, right psoas muscle, left longissimus colli, and bilateral latissmus dorsi). Stimulated Tg was 845 ng/ml. (c) FDG PETCT scan - arrow showing FDG positive cutaneous and muscle deposits, (d) Biopsy of Right psoas muscle deposit - shows infiltarting neoplasm composed of cells arranged in a papillary pattern, separated by fibrinous stroma. Each cell has round to oval clear nuclei, with nuclear overlapping, moderate eosinophilic cytoplasm. Neoplastic cells are CK 7 and thyroglobulin positive and negative for CK 20.

Figure 5: A 45-year-old male with multinodular goiter s/p total thyroidectomy and right neck dissection. Histopathology was reported as papillary thyroid carcinoma – conventional type treated with 120 mCi of <sup>131</sup>I. Four months later developed small painless, purple-colored skin nodules. Whole body FDG PET/CT was suggested. Images showed focal FDG avidity in multiple intramuscular deposits (left 6<sup>th</sup> intercostal space, left gluteus intermedius, paravertebral muscle on left side at level of L4/L5, right pectoralis major anterior to 3<sup>rd</sup> rib, right psoas muscle, left longissimus colli, and bilateral latissmus dorsi). Stimulated Tg was 845 ng/ml. (c) FDG PETCT scan - arrow showing FDG positive cutaneous and muscle deposits, (d) Biopsy of Right psoas muscle deposit - shows infiltarting neoplasm composed of cells arranged in a papillary pattern, separated by fibrinous stroma. Each cell has round to oval clear nuclei, with nuclear overlapping, moderate eosinophilic cytoplasm. Neoplastic cells are CK 7 and thyroglobulin positive and negative for CK 20.