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Table 2 Summary of histological features of KH cases. (n = 8)

From: Kaposiform Hemangioendothelioma: clinicopathological characteristics of 8 cases of a rare vascular tumor and review of literature

Case # Tumor size
(cm.)
Percentage of Vascular Nodules Percentage of Spindle cells Lymphangioma-like vessels Mitoses /10 HPFs Cytoplasmic vacuoles Microthrombi Extent/Plane of invasion (Skin, subcutaneous tissue, bone) Margins Additional features
1# 5 × 2 5 % 95 % None 6 Absent Absent Muscle Involved Sieve-like architecture of nodules
2 1 × 0.5b > 95 % < 5 % None 5 Absent Absent Dermis Involved Lymphoid follicles, mixed inflammation
3 1.5 × 1a 80 % 20 % None 7 Present Absent Dermis & subcutis Cannot be assesseda Hyaline globules
4 3 × 1.5a > 95 % None < 5 % 6 Present Absent Soft tissue Cannot be assesseda Hemorrhage & Perineural invasion
5 2 × 0.8 80 % 15 % 5 % 4 Absent Absent Synovium Involved Background fibrosis
6 5.5 × 3.5 70 % None 30 % 6 Present Absent Bone Involved Perineural invasion
7 1.5 cm. 80 % 15 % 5 % 6 Present Present Pancreas Tumor free None
8 2.5 × 1b 90 % 10 % None 2 Present Present Dermis Cannot be assessedb None
  1. aTumor was received in multiple fragments
  2. bIncisional biopsy specimen was received