BJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Monteiro, M
Right arrow Articles by Tomé, V
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Monteiro, M
Right arrow Articles by Tomé, V

Sacrococcygeal teratoma with malignant transformation in an adult female: CT and MRI findings

M Monteiro, MD1, T M Cunha, MD1, A Catarino, MD2 and V Tomé, MD3

Departamentos de 1 Imagiologia, 2 Patologia Morfológica e 3 Oncologia Médica, Instituto Português de Oncologia de Francisco Gentil (I.P.O.F.G.) Centro Regional de Lisboa, R. Prof. Lima Basto, 1099-023 Lisboa Codex, Portugal



View larger version (46K):

[in a new window]
  		Figure 1. CT scans show (a) a thin walled cystic mass with homogeneous hypodense content anterior to the sacrum, compressing the urinary bladder and anteriorly displacing the rectum and vagina. A discrete amount of floating fat can be seen anteriorly (arrowhead). (b) At an inferior level, a contrast enhancing solid nodule is seen, apparently vegetating from the posterior wall, in close relation with the coccyx. There is no evidence of bone destruction. (c) The mass extends inferiorly into the left ischiorectal fossa.

 


View larger version (94K):

[in a new window]
  		Figure 2. MRI reveals two independent cystic portions. Axial scans show (a) a right-sided superior and (b) a left-sided inferior cyst with homogeneous contents. The superior cyst shows hyperintense signal on both (a.1) T1 and (a.2) T2 weighted images, compatible with high protein fluid. The inferior cyst shows (b.1) hypointense signal on T1 and (b.2) hyperintense signal on T2 weighted images, indicating serous fluid. (b.1) Only the discrete lamella of hyperintense signal, visible at the right periphery of the inferior cyst (arrowhead) corresponds to pure fat content, as it is completely suppressed on a fat saturated sequence (b.3). a.1 and b.1, T1 weighted images (TR, 426 ms; TE, 8.0 ms); a.2 and b.2, T2 weighted turbo spin echo (TR, 5404 ms; TE, 120 ms); b.3, fat saturated T1 weighted (TR, 680 ms; TE, 8.0 ms).

 


View larger version (74K):

[in a new window]
  		Figure 3. Axial T1 weighted (TR, 426 ms; TE, 8.0 ms) scan. (a) Without contrast the adenocarcinomatous nodule has hypointense signal, indistinguishable from the content of the inferior cyst. (b) After gadolinium administration the nodule becomes distinctively hyperintense.

 


View larger version (126K):

[in a new window]
  		Figure 4. (a) Coronal and (b) midline sagittal T2 weighted turbo spin echo MR images (TR, 6859 ms; TE, 150 ms). The tumour has an hourglass appearance with the rectosigmoidal transition tightly compressed between the cystic components. The solid component at the isthmus (arrowhead) is seen in close relation with the anterior surface of the coccyx. No evidence of invasion of the surrounding structures was seen in any of the planes.

 


View larger version (144K):

[in a new window]
  		Figure 5. Photomicrographs (haematoxylin-eosin stain, original magnification (a) x40; (b) x20) show (a) the wall of the cyst composed of fibrous tissue with an inner lining of mature squamous epithelium and respiratory epithelium, and (b) irregular nests of moderately differentiated adenocarcinomatous glands infiltrating the surrounding stroma.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2002 by the British Institute of Radiology.