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 +0  (nbme20#12)

Thoracic duct relations.

 +3  (nbme20#12)

Thoracic duct relations.

consuela_salon  This was the picture that I liked the most for this question. If you imagine that the injury is at the level of the left subclavian vein (LSV) and thoracic duct (TD) crossing each other, maybe it will help you realize that the left breast & left upper extremity bypass the injury. The right lung is drained by the right lymphatic duct, not the TD (see one of the links bellow). And the heart is where eventually all the drainage is going to end up to be pumped again (TD -> LSV -> SVC -> heart).

 +0  (nbme20#12)

Mediastinal relations.

 +2  (nbme20#12)

The mass described is in the posterior mediastinum (see images below). The thoracic duct is damaged “near the mass”, hence drainage of organs distal to that point will be affected. The images below should clarify.

 +8  (nbme20#31)

A radiographically visible air-fluid level suggests a pretty large lesion (hence, “cavitary”). That's not going to become normal tissue again. Six months following resolution of symptoms you can expect healing in the form of a scar; that is, fibrosis but only in a single spot.

masonkingcobra  Robbin's: The basic mechanisms of fibrosis are the same as those of scar formation during tissue repair. However, tissue repair typically occurs after a short-lived injurious stimulus and follows an orderly sequence of steps, whereas fibrosis is induced by persistent injurious stimuli such as infections, immunologic reactions, and other types of tissue injury. The fibrosis seen in chronic diseases such as pulmonary fibrosis is often responsible for organ dysfunction and even organ failure.

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