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Invasive breast carcinoma - IARC

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Fig. 5.40 Venous haemangioma. Vascular channels<br />

of variable size occupy the cervical stroma. Note a<br />

portion of the ectocervical squamous epithelium in<br />

the right upper corner of the field.<br />

Fig. 5.41 Postoperative spindle cell nodule. The lesion is composed of spindle-shaped mesenchymal and<br />

inflammatory cells..<br />

Histopathology<br />

The tumour is composed of rhabdomyoblasts<br />

with small, uniform<br />

nuclei dispersed in a myxoid and<br />

oedematous stroma. The typical cambium<br />

layer of sarcoma botryoides is<br />

absent {690}.<br />

Postoperative spindle cell nodule<br />

Definition<br />

A localized, non-neoplastic re a c t i v e<br />

lesion composed of closely packed proliferating<br />

spindle cells and capillaries<br />

simulating a leiomyosarcoma occurring<br />

at the site of a recent excision.<br />

Clinical features<br />

The lesion develops at the site of a recent<br />

operation several weeks to several<br />

months postoperatively {1420,2020}.<br />

Histopathology<br />

The lesion is composed of closely packed,<br />

mitotically active, spindle-shaped mesenchymal<br />

cells and capillaries often with<br />

an accompaniment of inflammatory cells,<br />

and may infiltrate the underlying tissue.<br />

Differential diagnosis<br />

Postoperative spindle cell sarcoma may<br />

closely resemble a leiomyosarcoma or<br />

other malignant spindle cell tumours, but<br />

the history of a recent operation at the<br />

same site facilitates its diagnosis.<br />

Other benign tumours<br />

R a re examples of cervical lipoma<br />

{334,1910}, haemangioma {47,629}, glomus<br />

tumour {64}, localized neurofibromatosis<br />

{381,986}, schwannoma {1093},<br />

pigmented melanocytic schwannoma<br />

{2900}, granular cell tumour {553,952,<br />

1101}, ganglioneuroma {858} and paraganglioma<br />

{3229} have been reported.<br />

Mesenchymal tumours 283

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