这段话：
Inflammatory carcinoma of the breast is characterized by diffuse, brawny induration of the skin with an erysipeloid edge, usually with no underlying mass. If the skin biopsy is negative and there is no localized measurable primary cancer, the T category is pTX when pathologically staging a clinical inflamatory carcinoma (T4d)。 Dimpling of the skin，nipple retraction, or other skin change, except those in T4b and T4d, may occur in T1, T2, or T3 without affecting the classification.
乳腺的炎性乳癌，特点是皮肤弥漫性红肿、变硬，一般无肿块。如果皮肤活检阴性且局部未见癌，则TNM分期中，临床为T4d而病理TNM分期为pTX。皮肤橘皮样、乳头回缩以及其他皮肤改变，除了发生在T4b和T4d期外，也可发生在T1、T2、T3，因此并不影像其TNM分期。
这样理解对吗？
我觉得有问题啊
皮肤发生改变，至少就是T4b了啊，怎么还“may occur in T1, T2, or T3 without affecting the classification”
是我理解有错误吗？