Dear Editor,

The article titled “Bilateral four heads of the sternocleidomastoid muscle”, authored by So-Yeon Kim et al., accepted from Surgical Radiologic Anatomy, has conflicts between figures and explanations [1].

In the second paragraph of the Case Report section, it is explained that right-side m. sternocleidomastoideus consists of two sternal and two clavicular heads on page: 871 and there is an orientation to Fig. 1a. However, the explanations which were mentioned in the same paragraph contradict with Fig. 1a. In such a manner that picture on Fig. 1a shows that the muscle consists of 1 sternal and 3 clavicular heads on the right side.

There is also the similar issue in the first paragraph of the page 872 in the article. It is explained that there are 4 heads which belongs to left side; m. sternocleidomastoideus consists of 1 sternal and 3 clavicular heads pointed at Fig. 1b, c. Even if these figures shows left side, m. sternocleidomastoideus consists of 2 sternal and 2 clavicular heads; not 1 sternal and 3 clavicular heads as described in the relevant paragraph of the article.

The absence of any distinctive marker makes it difficult to understand the anatomic placement and neighborhood of muscle and bone and various structures, which is mentioned.


Sincerely.